Big Finish Doctor Who – Companions / Characters

Companions of the Doctor appearing in Big Finish's audio plays based on Doctor Who.

Please keep in mind that, although the series is officially part of the Whoniverse, it encompasses many different timelines and continuities and adaptations of existing works from the Doctor Who Expanded Universe. Owing to Big Finish's sheer size and complexity, it also plays by the rules of the Doctor Who Expanded Universe: the TV series can at times contradict or overwrite the timelines described here, or adapt them for the televised continuity.

For a still-growing recap list of the audio dramas featuring these characters, feel free to look here.

For the other cast pages relating to Big Finish Doctor Who, see:

Every companion from the classic era of the Doctor Who TV series and many of the companions from the revived era have returned for the Big Finish audio adventures. All surviving actors have returned to play their roles, and a handful have been recast due to the actors' deaths. Although they usually travel with the Doctor, some appear together in Companion Chronicles for their own adventures, or in their own separate series. For general character tropes about these returning companions, see either the classic series companions page or the revival series companions page.

The companions listed here are sorted in order of their first time meeting the Doctor in the TV series.

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Susan Foreman, later Susan Campbell

Susan Campbell (First and Eighth Doctors)

https://static.tvtropes.org/pmwiki/pub/images/susan_foreman.jpg

^{Click here to see her older self}

Voiced by: Carole Ann Ford, Claudia Grant (First Doctor Adventures)

Aside from appearing in plenty of Companion Chronicles with the First Doctor, Susan returns as a companion to the Eighth. She's had a busy 20-odd years since her grandfather left her with freedom fighter David Campbell. She raised a half-human son, Alex, and rose high in Earth's fledgling government. Later winds up helping the Earth adjust to the concept of working alongside aliens... and fighting Daleks. Again, and again.

Break the Cutie: A second Dalek invasion, just like the first... but far worse, losing her son to the Daleks in said invasion and her entire life is ruined in the span of two audio dramas. But despite all she's lost, Susan is more worried about her grandfather's mental state than herself.
Give Him a Normal Life: Susan doesn't give up her son, but she does pretend to be human for his sake.
Jumped at the Call: Despite the Doctor attempting to stop her, when she gets a message that is basically her call up papers to go and take part in the Last Great Time War she decides to leave Earth and fight.
Mama Bear: She's this to her son Alex.
Reasonable Authority Figure: Both on planet Earth in its regular timeline, and in the alternate timeline of "Auld Mortality"/"A Storm of Angels", in which she becomes Lady President of Gallifrey.
Shipper on Deck: The Companion Chronicle "Here There Be Monsters" opens with her talking about how she thinks that Ian and Barbara truly belong together.
Uncertain Doom: As of this writing, the last appearance of Susan is in the Susan's War range, where after the deaths of everyone she loved on Earth, she decided to return to Gallifrey and join the Time War. She would later attract the attention of Rassilon, though what that means is unknown. All we know after that is that the Doctor seems pretty certain she's dead.

The TARDIS

See Doctor Who – The TARDIS.

Barbara Wright

Voiced by: Jemma Powell

TBA

Ian Chesterton

Ian Chesterton (First Doctor)

Voiced by: William Russell, Jamie Glover

Having spent a long time travelling with the First Doctor, Ian has many, many stories to tell. Now much older, he fondly looks back on his adventures.

Closest Thing We Got: "Sphere of Influence" sees an elderly Ian being called upon by Susan and the Time Lords to help them negotiate an alliance with the Sensorites to help in the Time War. Ian protests that he isn't a trained diplomat, but the Time Lords affirm that they are aware of his experiences with the Doctor that make him more qualified than many of their own people.
Flash Back: His stories in general, since William Russell's voice wouldn't be able to pass for young Ian anymore.
Relationship Upgrade: "The Rocket Men" chronicles the exact moment he fell in love with Barbara. Literally. Out of a World in the Sky at terminal velocity.
The Slow Path: Averted in "The Revenants", when he and Barbara manage to reach the 1950s, but can't bring themselves to live out the years in quiet solitude until they'd reach their own timeframe again. They choose to go back to the TARDIS instead.

Vicki Pallister

Vicki Pallister (First Doctor)

Voiced by: Maureen O'Brien

Joining the TARDIS crew as a young girl after the death of her father, Vicki went on to make a new life for herself in ancient Troy.

Like Brother and Sister: Vicki is established as having this kind of bond with Steven, which leaves him hurt when she decides to leave.
Nice Job Breaking It, Hero: “The Crash of the UK-201” sees Vicki become essentially unstuck in time, allowing her to go back to the crash that killed her father with the goal of saving his life. She succeeds in this goal and goes on to marry and have children, but when she jumps back in time to change her history after one or the other of her children die in a war, she causes so many changes that she doesn’t even give birth to the same children as she had before.
Spanner in the Works:
- Vicki is a particular problem to the plans of the villain in “The Fifth Traveller”; Jospa has been able to manipulate the desires of the Doctor, Ian and Barbara to go along with his plans, but Vicki just wants to keep travelling, so she has nothing Jospa could compel her to want more so that he can control her.
- Vicki ends up serving as this in "Fugitive of the Daleks" as well; when the robot Doctor essentially hijacks the TARDIS, the ship travels to an older Vicki, allowing her to help the robot Doctor resist his Dalek programming long enough for her to find Dodo and the real Doctor.

Steven Taylor

Steven Taylor (First Doctor)

https://static.tvtropes.org/pmwiki/pub/images/steven_0.jpg

Voiced by: Peter Purves

The action-prone, long-suffering pilot from the far future, Steven's audio adventures greatly extend his time travelling with the Doctor, implied to be at least a few years by the time he eventually departed. His relatively short time travelling onscreen with fellow companions Vicki, Sara Kingdom and Dodo are extended, and he becomes quite Genre Savvy about the kinds of situations they find themselves in (much to the Doctor's irritation, as he firmly believes the only real expert is him). Steven's experience as a pilot and soldier comes up much more often than it ever did onscreen, and some details about his past as well as his future after leaving the TARDIS are eventually revealed.

A Birthday, Not a Break: Steven's 21st birthday, several years before he met the Doctor, involved him being brutally beaten by a Rocket Men captain and having his legs broken. During "Return of the Rocket Men", he, Dodo and the Doctor accidentally travel back to the exact date, where he rescues his past self so he can go on to travel in the TARDIS and eventually rescue himself and makes what he fully believes to be a Heroic Sacrifice in the process.
Action Duo: Forms an unofficial one with Sara Kingdom during the months she travels in the TARDIS. She is a professionally trained SSS operative, skilled in unarmed combat and handy with a blaster, while Steven is more of a brawler, and they complement each other nicely.
Adaptation Expansion: Steven was a member of the regular cast for roughly one year of real world time. Several of his Big Finish stories, like "Mother Russia", "An Ordinary Life" and "The War To End All Wars" feature him staying in one place for weeks or months on end, and the time that Sara Kingdom spent travelling with him and the Doctor is also expanded to about six months in order to tell more stories with her. This all adds up to Steven being one of the First Doctor's longest-serving companions, second only to Susan.
Alternate Timeline: Thanks to various temporal mistakes, Steven is prominently featured in two alternate timelines. In "Daughter of the Gods", he, the Doctor and Katarina are prevented from heading straight to Kembel after leaving ancient Troy in "The Myth Makers", and he gets to spend much more time with Katarina before the timeline is restored to normal. In "The Secret History", meddling with the Doctor's timeline sees Steven and Vicki briefly travelling with the Fifth Doctor in place of the First, and a later, more extensive rewrite makes them the Monk's companions before the Doctor restores the original timeline.
Back for the Finale: Retroactively. A much-older Steven makes contact with the First Doctor one last time while he is in Antarctica circa 1986, shortly before his first death and regeneration.
Cloud Cuckoo Landers Minder: With the Doctor's mood swinging randomly from blunt and crotchety to mysterious and mischievous, Steven has to do a lot of reigning him in and apologising to other people on his behalf.
Cold-Blooded Torture: Subjected to this by a squad of Sontarans via an Agony Beam. They want him to give up information about the earth empire in the time period Steven is currently in, but poor Steven doesn't have any information to give even if he wanted to.
Dead Guy Junior: Long after he has left the TARDIS and settled on the planet from "The Savages", Steven names one of his three children after his travelling companion Dodo.
Desperately Looking for a Purpose in Life: Steven's adventures on audio progressively develop his dissatisfaction with the nomadic lifestyle of TARDIS travel; though he likes helping people, he often feels that moving on with the Doctor so quickly might be a mistake and that some situations can't be resolved with one battle against an alien menace. His desire to stop wandering in and out of events and make a real difference somewhere serves as foreshadowing for his eventual departure in "The Savages", explaining his willingness to accept the position of leader on the planet from that story and help their society rebuild.
Did Not Get the Girl: Various stories establish that he has very strong feelings for Sara Kingdom, but is aware that she doesn't return them and even if she did, is still too traumatised by her brother's death to even think about a relationship. Her eventual death means that Steven never stood a chance with her.
Distressed Dude: Captured or severely injured in several stories, including seemingly dying during the events of "The Anachronauts".
Fish out of Temporal Water: More than once, Steven is separated from the Doctor and the TARDIS at various points in Earth's past, and while he acclimates well enough, even getting himself employment during "An Ordinary Life" and "The Vardan Invasion of Mirth", he still struggles with many customs that have passed out of human habit by his time, not to speak of basic skills like cooking. He and Sara manage to find a way to burn salad.
Free-Love Future: Steven comes from far enough in the future of humanity that nobody bats an eye at things like sexual orientation. After Oliver Harper (from the early 1960s) joins the TARDIS, Steven is shocked to find out that homosexuality is illegal in Oliver's time.
The Good King: Makes good on his promise to help rebuild the society of the planet he parts company with the Doctor on, becoming a beloved, benevolent ruler. Long after he leaves the throne and his children take over, he is still so admired by his people that getting his blessing for a new ruler is a top priority for anyone vying for the position.
Grand Theft Me: The lone Vardan destroyed by Oliver's Heroic Sacrifice kept a fragment of itself alive in both Steven and the Doctor's minds, spending long decades slowly influencing Steven into building the device that would reunite him with the Doctor, allowing it to reconstitute itself.
Help Yourself in the Future: During "Return of the Rocket Men", Steven realises that the rogue Rocket Man who had rescued him from certain death on his 21st birthday was his future/current self in disguise.
Improbable Aiming Skills: During "The Cold Equations", Steven employs his knowledge of physics gained from space pilot training to aim a bit of debris through open space to hit a small target against all odds, managing to retrieve the TARDIS and saving his and Oliver's lives.
Lantern Jaw of Justice: Steven's impressive jawline and general bone structure cause him some issues with comedian Teddy Baxter in "The Vardan Invasion of Mirth". Teddy is looking for a partner to join him in his comedy double act, but is concerned that somebody as "chiselled" as Steven might upstage him without saying a word.
Like Brother and Sister: Is very close with both Vicki and Dodo, though he bickers with the latter much more. His affection for them is in stark contrast to his romantic feelings for Sara, and Steven's relationships with all three are considerably more fleshed out in audio than they ever were on television.
The Slow Path: Becomes well-acquainted with Earth in the 1950s on two separate occasions after being separated from the Doctor, once for several months with Sara Kingdom, and again by himself for a couple of weeks.
Straight Man and Wise Guy: His practised role at being patient-yet-exasperated in response to the Doctor's eccentricities ends up getting him recruited as the comedy partner of comedian Teddy Baxter after being stranded in the 1950s.

Katarina

Katarina (First Doctor)

Voiced by: Ajazz Awad

Broken Pedestal: Learning the full details of the First Doctor’s role in the fall of Troy, Katarina acknowledges that he isn’t a god, but still chooses to respect him as a friend.
Heroic Sacrifice: In the end, Katarina faces her destined fate with dignity.
The Nth Doctor: Portrayed in audio by a different actress but still intended to be the same Katarina.
Spared by the Adaptation: A collision in the Time Vortex diverted the First Doctor’s TARDIS from Kembel, resulting in Katarina surviving past the date she was meant to die… until the Second Doctor explains the truth and puts things back.
You Can't Fight Fate: Katarina is still certain that she was meant to die despite the Doctor and Steven’s assurances to the contrary.

Sara Kingdom

Sara Kingdom (First Doctor, Fifth Doctor)

Voiced by: Jean Marsh

An agent of the Space Security Service, Sara was manipulated by Mavic Chen into killing her brother in the belief that he was a traitor. She joined the Doctor and Steven to complete her brother's final mission. Although she was killed in the confrontation with the Daleks, a copy of her consciousness survived to help a house that essentially granted the wishes of its inhabitants' exercise more moral judgement and avoid responding to more impulsive wishes.

My God, What Have I Done?: Various storylines confirm that she is still tormented by her guilt over her role in Bret's death.
You Can't Fight Fate: In the audio "The Guardian of the Solar System", when the TARDIS arrives a year in her relative past, Sara tries to change her history by warning Brett and offering advice to Mavic Chen of how he might do things differently, but realises as she's leaving that her actions will just inspire Brett and Chen to do what they did in her past anyway.

Dodo Chaplet

Dorothea "Dodo" Chaplet (First Doctor)

Voiced by: Lauren Cornelius

All-Loving Hero: Dodo is such a compassionate individual that she even begs for the Monk's life because she doesn't want him dead even after he manipulated her into joining a group of outlaws that could have led to her being executed.
The Beastmaster: In "The Secrets of Det-Sen", Dodo is taught a secret chant that allows her to ask the Yeti for help.
The Nth Doctor: Portrayed in audio by a different actress but still intended to be the same Dodo.
Wrong Genre Savvy: When they arrive in the time of King John, Dodo initially responds to the situation based on her knowledge of the tales of Robin Hood, and the Doctor has to carefully explain to her that things weren't as simple as the myths present regarding whether Richard was a good king and John a bad one.

Jamie McCrimmon

Jamie McCrimmon (Second Doctor)

https://static.tvtropes.org/pmwiki/pub/images/jamie_5.jpg

Voiced by: Frazer Hines

Nice Job Breaking It, Hero: Jamie nearly changes his own history in "The Glorious Revolution" by causing a dangerous temporal paradox, requiring complex assistance from a Time Lord visiting his future self to prevent the change becoming permanent.
Something Only They Would Say: Tries to get the Sixth Doctor to do this during "The Last of the Cybermen", not believing he's a future version of the Doctor he knows, but it doesn't happen (he still ends up believing the man, but for different reasons).
You Can't Fight Fate: The Sixth Doctor tries warning him about what happens at the end of "The War Games" during "The Last of the Cybermen", but to no avail.

General Sir Alistair Gordon Lethbridge-Stewart

Voiced by: Nicholas Courtney (2000-10), Jon Culshaw (2019 onwards)

Now retired and Happily Married to Doris, the Brigadier (or the General, although he prefers being called the former) still works with UNIT at times.

Cool Old Guy: The Brigadier might be retired, but he's still willing to pull his weight in a crisis (even in an alternate universe where he spent thirty years defending Earth without the Doctor).
Deadpan Snarker
Happily Married: He has a good life with Doris... at least until a boating accident claims her life, and the Brigadier spends the remainder of his in a nursing facility before his own time comes.
Hidden Depths: When events lead to the Eighth Doctor visiting the Brigadier during his third incarnation's exile, he swiftly understands the Doctor's explanation that he's a future version of the Doctor the Brigadier's familiar with currently caught in a time loop.
Retired Badass: Although he is rather old and retired, the UNIT series sees him leading a covert operation to save Britain from total anarchy. In "Forty 2- The Auton Infinity", he manages to trick the Master into a trap, exploiting the Master's ego and noting that he's become more practical in his old age. The Unbound story "Masters of War" has him putting that experience to good use, despite having been forcibly retired.
Self-Serving Memory: When the Eighth Doctor witnesses the Brigadier's Hidden Depths (see above), the Doctor realises that he focused more on his own bitterness about his exile and let it colour his own views of events in that time.
10-Minute Retirement: He signs back on with UNIT, as a scientific advisor, when he realises he can never truly bring himself to leave.
Vitriolic Best Buds: Interestingly averted: due to Six's straightforward attitude and Eight's kindness, he gets along noticeably better with Six and Eight than he ever did with Two, Three, Four and Seven in the TV series. The Unbound version of him has this relationship with the alternate Third Doctor as well.

Zoe Heriot

Zoe Heriot (Second Doctor)

Voiced by: Wendy Padbury

When Zoe parted from the Second Doctor, the Time Lords erased Zoe's memory of her adventures. But certain parties have evidence that she travelled in time, and have tracked her down in search of the information she doesn't know she knows.

Character Catchphrase: "I remember everything — and I remember nothing."
Friendless Background: Zoe had a troubled upbringing, and since she left the Doctor her troubled mental state has made it even harder to connect with people.
Nice Job Fixing It, Villain: When the Cybermen tried to turn Zoe into the new Cyber-Controller, she was able to use that control to trap the Cybermen in the Land of Fiction, and later summon the Sixth Doctor for help.
Past Experience Nightmare: Has suffered from them for decades, due to repressed memories of her time with the Doctor.
Stable Time Loop: "Second Chances" sees Zoe regain her memory of a trip to a particular space station in what was her home era's future just as the event is about to happen 'now'; she ends up ensuring the survival of her past self during the crisis while trying to save the station.
Wetware CPU: During "The Last of the Cybermen", she winds up being taken over by the Cyber-Controller as a suitable interface. She gets better, fortunately.
Wistful Amnesia: She knows she's lost something, and it's damaged her ability to connect with people.

Liz Shaw

Dr. Elizabeth "Liz" Shaw (Third Doctor)

https://static.tvtropes.org/pmwiki/pub/images/lbvynpa2byqsrnaiahybtznejmpuyvyi_hq.jpg

Voiced by: Caroline John (2007-2012), Daisy Ashford (2019-present)

The intellectually brilliant and steadfastly brave companion to the Third Doctor, Liz appeared in only four television stories and was infamously written out of the show without being given an on-screen departure. To combat this, most stories featuring Liz are set between her final TV adventure, "Inferno", and her replacement by Jo Grant in "Terror of the Autons" and go some way to explaining her choice to leave UNIT and the Doctor. A few stories are placed between her televised adventures (where she becomes well-acquainted with River Song) and she also reunites with the Doctor a couple of times after she has permanently left him.

Caroline John reprised her role in five stories for the Companion Chronicles range, the last of which was released posthumously. Beginning in 2019, the role of Liz was taken up by Daisy Ashford, John's daughter.

Brainwashed and Crazy: Some time after leaving UNIT, Liz becomes infected with the same substance from "Inferno". She has developed a supressant that prevents her from fully becoming a barbaric Primord, but her mind is overridden by the need to infect and transform others. The Doctor and Jo are able to cure her, eventually.
Defrosting Ice Queen: Take some time to warm up to River Song, initially resenting the other woman for being brought in to do her job or even replace her, and is frosty towards her throughout their first adventure together. Eventually she grows to trust River, at one point straight up disobeying the Doctor to travel with River using her vortex manipulator rather than ride with him in Bessie.
Deliberate Values Dissonance: In "The Blood Woods", the Doctor has taken a leave of absence and the Brigadier searches for a replacement, much to Liz's frustration as the Doctor's job had originally been hers in the first place. Though the Brigadier never outright says it, Liz knows that he doesn't think she can do the job on her own without a man around.
Loony Friends Improve Your Personality: Describes herself as an uptight prude when she was a teenager and young adult, but her unlikely friendship with wild child Jean Milburn brought her out of her shell and, among other things, influenced her fashion sense, explaining the giant hats and miniskirts she wore in the show.
Love Cannot Overcome: A platonic version. Though she cares for the Doctor very deeply, ultimately Liz is completely unsuited to military life with UNIT and is well aware that her scientific brilliance is being wasted on things that the Doctor could manage perfectly well by himself. She sticks it out for at least a year, but eventually forces herself to leave the Doctor behind to better her own life.
Overshadowed by Awesome: Liz is without a doubt an extremely brilliant scientist; UNIT forcefully recruited her for a reason, after all. But she is all too aware that with the Doctor around, she is pretty much a spare part, and feels without purpose in UNIT.
Parent-Child Team: Teams up with her mother, Dame Emily Shaw, to take on the Apocalypse Clock in "The Last Post".
Screw This, I'm Outta Here: Told from Liz's perspective, most of her Companion Chronicles build to her pulling one of these, stemming from her frustration with UNIT's rigidity and sexism, as well as generally feeling like a spare part in comparison to the Doctor.
Teeth-Clenched Teamwork: Liz likes the Brigadier and her other UNIT colleagues well enough as individuals, but she chafes under the constrictive, occasionally blinkered views and protocols of military life. Post-"Inferno" stories show her becoming increasingly frustrated with the chain of command and the military mind, building up to her abrupt resignation.
They Call Me MISTER Tibbs!: For Liz, it's not so much that she has to insist on being referred to by title, but which title she is called that is the issue. Everybody at UNIT refers to her almost exclusively as "Miss Shaw", and she periodically reminds them that she is, properly, "Doctor Shaw".

Jo Grant, later Jo Jones

Josephine "Jo" Jones née Grant (Third and Eleventh Doctors)

https://static.tvtropes.org/pmwiki/pub/images/jo_grant.jpg

Voiced by: Katy Manning

Jo stars in many stories set during her time with the Third Doctor at UNIT, occasionally with Mike Yates along for the ride. Adventures taking place after "The Green Death" typically jump forward several decades to showcase the older Jo seen in "Death of the Doctor". Even in her later years, Jo continues to be quite an active adventurer, joining up with Iris Wildthyme for several adventures, teaming up with her old UNIT teammates Yates and Benton to help out Kate Stewart, and assisting Jack Harkness in the Torchwood story "The Green Life".

Brief Accent Imitation: During "The Green Life", she attempts to imitate Jack Harkness's accent.
Cerebus Retcon: Her meeting the Eleventh Doctor is put in a new light in UNIT: Tidal Wave and The Sacrifice of Jo Grant. While she by no means regrets meeting him, Jo actually found it very hard to look at him as he looked and acted nothing like the Third Doctor. Seeing him was pretty much confirmation that the man she loved was gone forever.
Dirty Old Woman: She might be a happily married woman in her late 60s, but Jo is not beyond indulging in a healthy snog with Jack Harkness. Jack doesn't exactly complain, either.
Fake Memories: She spends a horrific evening thinking she's having a nice night in with her uncle, reminiscing about her UNIT days. The problem is that said uncle has been dead for quite a while - it's the Master, who spends the soiree delighting in playing with her senses until she breaks down in horror at the revelation, and to make it worse, when the villain leaves, she's stuck with the implanted memories.
A Fête Worse than Death: In "Masterful", Jo encounters a roomful of Time Lords, who she finds slightly stuffy but fairly amiable, unlike the Doctor's opinions of his own people. She herself compares them to "friendly bank managers". Most find it inexplicably amusing, while one loses his marbles to the point of demanding a weapon to immediately kill her. Unfortunately, it turns out they're all indeed Time Lords... all of them incarnations of the Master, who've brought her to the gathering to sacrifice her. While they succeed, the timeline these events happen in collapses, undoing all of it.
Have We Met Yet?: In "The Sacrifice of Jo Grant", Jo of 2020 is sent back to the 1970s and is incredulous when the Third Doctor of that era initially assumes she's her younger self.
Heroic Sacrifice: 412 of them in "The Many Deaths of Jo Grant." Fortunately, it's All Just a Dream.
Identical Stranger: Jo looks and sounds exactly like Iris. This is never acknowledged by anyone, Rule of Funny being in full effect.
Killed Off for Real: In Masterful she makes the mistake of trusting Missy and this leads to her death when the Mistress gets tired of her. Thankfully this was an Alternate Timeline.
Missed Him by That Much: During "The Elixir of Doom", Iris enforces this to make sure that Jo never directly interacts with the Eighth Doctor, fearing that Jo would jump at the first chance to leave her and travel with the Doctor again.
Morality Pet: Jo acts as the best version of herself when she travels with Iris Wildthyme. Though hardly a villain, Iris indulges in Jo's more upright views, paying for clothes instead of shoplifting and not drinking quite so much while driving the bus. That said, Jo doesn't mind the parties and fun that Iris brings - she just doesn't want it to be all partying.
Noodle Incident:
- Jo and the Third Doctor like to go out ballroom dancing on Saturday nights with Benton.
- When she joins up with the Eleventh Doctor in the Short Trip "The Infinite Today", the narration strongly implies that this is not her first meeting with him since "Death of the Doctor".
Real Life Writes the Plot: Jo was the Third Doctor's longest-serving companion anyway, but the deaths of the actors who played Liz, Sarah Jane and the Brigadier mean that Jo was the de facto main companion of nearly all Third Doctor stories until all three of the above characters were recast in the late 2010s.
Soapbox Sadie: Even when walking through an abandoned mine, she still feels the need to lecture Jack on wearing leather shoes, and using a gun on venomous maggots. Jack just shoots back that she's still got a gas guzzling car.
What the Hell, Hero?: She chews out the Third Doctor, once she realises the Long Game he's been playing to replace her memories in order to protect her.
Young and in Charge: In "The Havoc of Empires", Jo successfully impersonates a chief security officer by way of a Bavarian Fire Drill, with the Doctor and Mike Yates as her subordinates. At this point in her life she would have been 23 at most, yet nobody bats an eye at her Improbable Age.

Captain Mike Yates

Captain Mike Yates (Third Doctor)

https://static.tvtropes.org/pmwiki/pub/images/mike_yates.jpg

Voiced by: Richard Franklin

Mike appears in a few Companion Chronicles, the third instalment of "Destiny of the Doctor", the second half of "The Worlds of Doctor Who" and in "The Third Doctor Adventures". Though he was previously part of non-Big Finish Doctor Who audio episodes by BBC Audio, they were given a mention in "The Worlds of Doctor Who", which is part of Big Finish canon after Big Finish acquired BBC Audio's properties.

The Atoner: He has come to regret his betrayal of UNIT, and has not only managed to work his way back into their trust but helps Ruth Matheson and Charlie Sato into good standing as well.
Canon Welding: Initially, Yates had a significantly greater presence in non-Big Finish Doctor Who audio episodes, accompanying Tom Baker's Fourth Doctor (and housekeeper Mrs Wibbesey) in the "Hornets' Nest", "Demon Quest" and "Serpent Crest" trilogy by Paul Magrs. Mrs Wibbesey was then given mention in "The Screaming Skull" during a probe of Mike Yates's mind, keeping Magrs's series in continuity with Big Finish.
Easily Forgiven: Zigzagged; he had to work long and hard to get back into his position at UNIT, what with the business with the dinosaurs and all. The Sixth Doctor, though a bit disappointed to be meeting Mike in the ruins of his old laboratory, doesn't seem to hold the past against him.
Naïve Newcomer: "Vengeance of the Stones" is the story of how he met the Doctor, stopped an alien invasion and joined UNIT ("Foreshadowing" features a similar event, except that on that occasion it was the Eighth Doctor subtly prompting Mike on the path that would lead him to UNIT).
Rank Up: He starts off his introduction story as a Lieutenant and we find out how he came to be promoted to Captain, then transferred to UNIT. In a meta sense, he is also occasionally bumped up to Companion status in a way he never was in the TV series, going on several adventures in the TARDIS with the Doctor and Jo.
Took a Level in Kindness: The experiences since his betrayal has led him to shed his Jerkass tendencies, leading to him becoming a better man and soldier.

Sarah Jane Smith

Voiced by: Elisabeth Sladen (2002, 2005-06), Sadie Miller (2021 onwards)

Prior to her reappearance on Doctor Who and later, The Sarah Jane Adventures, Big Finish gave Sarah Jane her own two-season series in Sarah Jane Smith. Her return to TV in the revived series and her subsequent spin-off meant Big Finish could no longer use the character, but in 2020 it was announced that the part had been recast to Sladen's daughter Sadie, who will play the character for the first time in "Return of the Cybermen", an adaptation of the original version of what became "Revenge of the Cybermen" for the Lost Stories range.

Anti-Hero: Arguably. Sarah Jane sometimes comes across as a bit of a Jerkass, puts the greater good ahead of her friends' lives, and in "The TAO Connection," she essentially murders the villain of the episode.
Badass Normal: As always, she fights aliens without any powers.
Break the Cutie: This being a Big Finish series aimed at an adult, fan audience, Sarah Jane is a lot more downbeat and even cold at times.
Left Hanging: Thanks the series being unexpectedly cancelled, Sarah was last seen running out of air in a spacesuit. Presumably she got out of it somehow, but we'll never learn just how.
Real Life Writes the Plot: The creation of The Sarah Jane Adventures meant that Big Finish couldn't use the character any more. When Tom Baker came on board, Nick Briggs received permission from Russell T Davies to use Sarah for the first series of The Fourth Doctor Adventures, but Elisabeth had to quietly drop out after falling ill.
Took A Level In Jerk Ass: Sarah Jane herself, after she left the Doctor (see Anti-Hero above). When she's called on it, she says that she basically had to in order to make life-or-death decisions for herself and others when the Doctor isn't there to save the day.

Leela of the Sevateem

Tropes associated with Big Finish

Voiced by: Louise Jameson

Leela travels with the Fourth Doctor in stories set between their TV series episodes. Later, living on Gallifrey, she meets the Eighth Doctor and Romana during their battle with Eldritch Abomination Zagreus. She and Romana subsequently get their own Big Finish spinoff, Gallifrey, and during that time, she travels back to Victorian London to team up with Jago and Litefoot for many adventures.

Doctor Who

Awesomeness by Analysis: Leela only has to use a weapon once to be an expert and she handles a gun proficiently after using one to protect her friends Jago and Litefoot in "The Talons of Weng-Chiang."
The Bus Came Back: Essentially acts as the Fifth Doctor's bodyguard during his time as Lord President of Gallifrey in Time in Office and serves as his companion when he's asked to hunt down Abby and Zara.
Constantly Curious: Leela is often eager and willing to learn from the Doctor even if she doesn't always understand his initial explanations.
The Determinator: Regardless of how powerful her opponent is, Leela will not stop trying to kill something that is clearly trying to kill her; when the mysterious Mr Shift proved capable of shifting his state from solid to liquid to gas, Leela's response to the Doctor's declaration that Shift must be indestructible was that she was "working on it".
Easily Forgiven: "Wrath of the Iceni" sees Leela briefly join Boudica's army and essentially betray the Doctor, but once Leela realises that she cannot go along with Boudica's ruthless campaign, the Doctor easily accepts her apology.
Literal-Minded: Leela's straightforward nature means she often has trouble with figures of speech.
Tomato in the Mirror: "Splinter" reunites Leela with K9 and the Tenth Doctor, but it's later revealed that "this" Leela technically originates from an alternate universe, although the Doctor makes it clear that she's still Leela as far as he's concerned.
Unusually Uninteresting Sight: She's not even remotely surprised when, at one point, the day is saved literally by the use of applied nonsense. After all, everything the Doctor does looks like nonsense to her.
Weak-Willed: Relatively speaking. As a human, she's much weaker against Mind Control than Gallifreyans, which her enemies gladly make use of.

Gallifrey

Handicapped Badass: Becomes blind due to an explosion in the third series of Gallifrey and she stays this way for a while. But this barely even slows her down as she has honed her other senses to still enable her to fight and defend herself and others because she can still hear her foes. She also sometimes pretends to be weak and helpless in order to trick her enemies, as well.

The War Doctor

The Bus Came Back: After being assumed dead since the start of the Time War, Leela is revealed to be alive in “The Lady of Obsidian”.
Trauma Conga Line: Leela experiences a particularly terrible one in “The Lady of Obsidian”; after a Disruptor Dalek nearly erased her from history, she was reconstituted with memories of all her alternate lives, to the extent that every near-death experience she had with the Doctor is now the memory of a true death and she can’t recall if she ever had children or who she married, among other details.
You Can't Go Home Again: As the War Doctor observes, everyone Leela knew on Gallifrey is dead by the time she returns in “The Enigma Dimension”.

Lungbarrow

Named by the Adaptation: Gives her full name as "Leelandredloomsagwinaechegesima".
Related in the Adaptation: Author, Marc Platt said in Doctor Who Magazine that her son grows up to become The Other and therefore The Doctor.

Doctor of War

In an Alternate Universe where the Doctor tried to destroy the Daleks in Genesis of the Daleks and caused the Time War to occur much earlier, Leela's life is altered forever due to the actions of the Master.

Downer Ending: The Master engineers events so that she and Gentek would conceive two children, and after the Master wipes out the Sevateem he uses a time device to accelerate Gentek's aging until he dies. He then uses it on Leela to accelerate her pregnancy and grow her children into adults, planning to use them as the start of a race of warriors that he can use to destroy the Daleks and eventually the Time Lords. Weakened from the pregnancy, Leela is unable to stop the Master from leaving her crying in the forest as he departs with her children in the TARDIS.
Promoted to Love Interest: She and Gentek become a couple in Who Am I?, while in The Face of Evil they were enemies.

Professor George Litefoot and Henry Gordon Jago

George Litefoot & Henry Jago (Fourth and Sixth Doctors)

https://static.tvtropes.org/pmwiki/pub/images/litefootjago.jpg

Voices By: Trevor Baxter and Christopher Benjamin

The pathologist and impresario from "The Talons of Weng-Chiang", who helped the Fourth Doctor and Leela. They returned in a Companion Chronicles story which was a Poorly Disguised Pilot for their own series titled Jago & Litefoot. After several adventures they reunite with the Doctor in his sixth incarnation and go on a couple of adventures. For Big Finish tropes related to these characters see here

K- 9

Has his own page.

Romana

Has her own page.

Adric of Alzarius

Adric (Fourth and Fifth Doctors)

https://static.tvtropes.org/pmwiki/pub/images/adric_2.jpg

Voiced by: Matthew Waterhouse, and briefly by Andrew Sachs (2008)

Matthew Waterhouse initially refused to return for Big Finish, so for a re-interpretation of the character post-"Earthshock", a much older Adric was played by Andrew Sachs in 2008. Waterhouse eventually agreed to join the cast in 2014, and many stories with Adric set during his TARDIS travels with the Fifth Doctor, as well as a few with the Fourth, have been produced since then. These adventures make an attempt at fleshing out his character more than the TV stories ever did, going some way to explain why he behaves as he does, confronting him with that behaviour and generally softening him out a little, making him a much more bearable character this time around, though he never quite loses his arrogant streak. Greater focus is put onto his Odd Friendship with Nyssa and the mentor-student relationship he had with the Doctor, as well as showcasing the kind of person he might have turned out to be in an alternate timeline during the Short Trip story "A Full Life".

Actor-Shared Background: Matthew Waterhouse is gay and an alternate, older Adric ends up in a relationship with another man, Reebac.
A God Am I: God-king of the prehistoric bug people.
Alternate Timeline: Two are shown where he has relevance. One, where the Doctor and Romana died in E-Space, stranding him and allowing him to grow old, and another where he was sent after "Earthshock".
Author's Saving Throw: In a more general sense. Big Finish attempts to make the most of the potential of Adric's character, which was not always on full display on television. The audio stories show that he can be useful, intelligent and passionate, though not to the extent of Character Shilling and deftly enough to avoid changing his character completely.
Back for the Dead: He spends his final moments helping Thomas Brewster.
Boy Meets Ghoul: In "A Full Life", Adric meets and marries Asun, who had previously drowned and been brought back to life by her grandfather. A fairly mild case, as even though Asun is technically undead, she was brought back exactly as she was when she was alive, with no side effects.
Deadpan Snarker: Unlike in the television stories where Tegan invariably won their many arguments, the audio series allows him to get a few licks in.
Adric: We brought this on ourselves. We should have been more careful, exercised better mental self-discipline.
Tegan: What? How were we supposed to know that something would be reading our minds?
Adric: I'm just saying, that's all.
Tegan: Well, don't. As my Aunt Vanessa used to say, if you can't think of anything useful to say, keep your mouth shut.
Adric: Say that to you a lot, did she?
Distressed Dude: In the Eighth Doctor story "Companion Piece", Adric is one of many companions abducted out of his timeline by the Nine and kept prisoner.
Dreaming of Things to Come: During "A Full Life". In a situation similar to "Turn Left", Romana and the Doctor's deaths mean that all the disasters they went on to avert still come to pass. Adric begins dreaming about the Master and the entropy wave which, without the Doctor's intervention, would have consumed the entire universe, and he knows he has to stop it.
Forgotten Fallen Friend: Averted, more so than on television, where his death was mourned for a full 90 seconds. His fellow companions talk about him every once in a while after he dies, and the Seventh Doctor still cares enough to tell his new companion Chris all about Adric, many decades (or centuries) after Adric died.
The Friend Nobody Likes: A downplayed example; while the Doctor, Nyssa and Tegan all miss him, during a later conversation the Doctor and Tegan admit that they often found Adric irritating, although the Doctor attributes that to Adric reminding him of his own teenage years.
Healing Factor: Adric's accelerated ability to heal plays a part in several stories, most commonly allowing him to feign injury to lull enemies into a false sense of security before he can escape. On one particular occasion, he was able to survive infection with a spore that basically killed everyone else exposed to it.
Heroic Sacrifice: In "A Full Life", he sacrifices the life he grew old in so that he can prevent the Doctor and Romana dying on Veridis. This doesn't actually kill him, but it does erase the timeline he came from, and directly ensures that the events we already know lead to his death in the normal timeline come to pass.
My Greatest Failure: His death is often implied to be this for the Doctor. When Adric meets the Seventh Doctor in "Cold Fusion", the manipulative and calculating Doctor is quite subdued upon seeing him again, and spends some time emphasizing the fact that as much as he might wish to change the past, he simply can't, without ever giving away to Adric what he's talking about.
Obfuscating Disability: Adric gets shot in the leg during "Iterations of I", and is kidnapped by his attacker. His Alzarian healing powers help him recover from the wound extremely quickly, but he pretends to still be hobbled for a while to trick the bad guy and eventually escape.
Only Mostly Dead: Turns out he survived the end of "Earthshock".
Stalker with a Crush: Spending decades of his life on prehistoric Earth, without any humanoid women around, led him to become a bit... preoccupied with the memory of Nyssa.
This Looks Like a Job for Aquaman: His mathematical brilliance, almost an Informed Attribute in the classic series, helps to save the day in "Iterations of I". In the same story, he also gets to show off his oft-forgotten Healing Factor.
What Could Have Been: "A Full Life" explores a timeline where he... had a full life, enough to grow old, get married and have children and a grandchild.

Nyssa of Traken

Nyssa of Traken (Fifth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/nyssa_17.jpg

Voiced by: Sarah Sutton

For the first ten years or so, Nyssa was the most prolific companion of the Big Finish line. Due to Mark Strickson's infrequent availability and Janet Fielding and Matthew Waterhouse initially refusing to take part, she became Five's de facto main companion for a long time, receiving massive amounts of Character Development never afforded by the TV series. Since the involvement of the other actors became more regular, Nyssa stories can be divided into four categories: she has many, many adventures travelling solo with the Doctor that are set between "Time-Flight" and "Arc of Infinity", as well as adventures with Tegan along for the ride once she rejoined after the latter story. There are also stories set early in her travels with Tegan and Adric (before "Earthshock", obviously). Finally, she would also encounter the Doctor and her friends again 50 years after she left the TARDIS in "Terminus" — despite it being only two days later for them. Luckily, as she's not human, this isn't as much of a problem as it could be, and she has many further adventures with the Doctor, Tegan and Turlough.

Action Mom: She ends up settling down and having two children, while still going out on medical research and rescue missions. The action ramps up even more once she comes back on board the TARDIS.
Alone with the Psycho: Made infinitely worse when said psycho is the Master, whose War incarnation is patient and skilled enough to make his sadistic mind games work.
Angst Aversion: Finally averted. The series notoriously neglected to ever examine the fact that the Master wiped out Nyssa's entire people and stole her dad's body to do it. In her audio appearances, Nyssa actually gets to confront her loss.
The Bus Came Back: She rejoins Five, Tegan, and Turlough 50 years later (for her) and two days after the events of "Enlightenment" (for them).
Burn the Witch!: As one of few people to ever leave their Arcadia, Nyssa falls under suspicion by the old world Trakenites who believe she's tainted by their version of the devil. Not that she was that safe on Earth: In "Winter For the Adept", the headmistress of Tremayne Academy is insistent that Nyssa is a succubus. In "The Land of the Dead", she picks up a psychic impression from still-living dinosaur skeletons in Alaska; the superstitious dig team mistakes it for a genuine premonition, and Nyssa is tied up and offered to the "spirits" as sacrifice.
- She's also subjected to the ducking stool in "Ghost Walk".
Calling Me a Logarithm: In "Winter For the Adept", she has this reaction to the Tremayne headmistress labelling her a "harlot". "Whore of Babylon" draws yet another blank.
Can't Stay Normal: Defied in Nyssa's case. She considers pursuing a simple life with Andrew, the boy she met in Stockbridge. Torn between her responsibilities as a scientist and the anxieties of a linear existence, Nyssa decides she can't cope and leaves in the TARDIS. However, "Circular Time" reveals that she does eventually marry a professor named Lasarti, with whom she has two daughters and a son.
Character Aged with the Actor: Nyssa's Plot-Relevant Age-Up allowed Sarah Sutton to play a Nyssa who was much closer to her own adult voice rather than that of her teenage self. This only lasted until "The Emerald Tiger", when she was infused with rejuvenation energy and physically de-aged to her younger self.
Character Focus: "Circular Time" is a sweet, almost dreamy character study of Nyssa.
Dead Guy Junior: Her youngest son is named Adric Traken, after her friend and planet both.
Died in Your Arms Tonight: In Tegan's, during "The Darkening Eye". (She gets better.)
Exposed to the Elements: Nyssa gets a rude awakening one night when the Doctor's teleport experiment sends her somersaulting down the Swiss Alps in her nightgown. She didn't see the humour in it.
Finishing Each Other's Sentences: With the Doctor, frequently.
Germanic Depressives: Like all Trakenites, she tends toward humourlessness, blank expressions, and Pop-Culture Isolation. Stuck in Hamburg without the TARDIS translating for her in "Fanfare For the Common Men", she begins to grow fond of the German language.
The Heart: Nyssa has always been one of the most kind and caring of all companions, but her status as The Heart is never clearer than when travelling alongside Tegan and Turlough.
How Unscientific!: Alien activity Nyssa can accept. Telekinesis and energy waveforms, for that matter. But ghosts in "Winter For the Adept"? Sorry, there's just no scientific basis for that.
Nyssa: I can't believe you're saying he's a ghost!
Doctor: He isn't! He's a floating cloud of energy which has the power to focus itself and move physical objects, often with dramatic results!
Hugh Mann: Nyssa never gets the hang of the whole 'incognito' thing. In "Spare Parts", Sisterman Constant radios in to report her as suspicious and out after curfew, and lists her "possibly bogus" alias as Nyssa O'Traken. Similarly, when Nyssa tells Andrew Harper in "Circular Time" that she is from Traken, he assumes from her hair that it's in Ireland.
I Choose to Stay: Fifty years after pulling one of these in "Terminus", Nyssa makes the sacrifice of leaving the TARDIS crew to stay behind in E-Space, meaning she'll never see them or her own family again.
Innocent Fanservice Girl: Very reluctantly so in "Primeval". The Doctor eventually caves in and lends her his coat to cover up with.
Killer Rabbit: "Spare Parts" reveals that the Cybermats originated as toys/pets for children on Mondas, since animals couldn't survive in the cavern environment. Nyssa mistakenly brings one home to the TARDIS, causing it to leech off the ship's engines. When Five finds out, his meltdown makes the Sixth Doctor look positively staid by comparison.
Letting Her Hair Down: In "Circular Time", she briefly tries a simple human life, even wearing jeans. The Doctor gently encourages her to explore it.
A Little Something We Call "Rock and Roll": In "Primeval", Nyssa teaches a bemused Trakenite how to dance the Charleston to the accompaniment of Atari music (It's the best their computers can manage, as there're no music recordings on Traken).
Older Than They Look:
- Thanks to the introduction of Trakenites' slowed aging, Nyssa is able to spend several in-universe years travelling solo with The Doctor after "Time-Flight" while still justifying Sarah Sutton looking exactly the same come "Arc of Infinity".
- After rejoining the TARDIS crew in "Cobwebs" after 50 years away, she is in her seventies but looks a couple of decades younger than that. This is taken to extremes in "The Emerald Tiger" when she goes through a rejuvenation process that reverts her to looking like she's in her 20s.
Poison and Cure Gambit: Shortly after leaving home in "Logopolis", she unknowingly became a puppet for Kwundaar, one of the Old Ones who ran the universe back in the Dark Times. When Nyssa falls ill, the Doctor thinks it's because she has no built-in immunities (since Trakenites have long since eliminated disease), when it's actually a ploy to lure them there.
Poke in the Third Eye: Nyssa's latent telepathic abilities make her a prime target for psychic beings and phenomena, sometimes resulting in prophetic dreams or being knocked unconscious. In fact, looked at chronologically, Nyssa experiences various pokes over three stories in a row^note.
Real Life Writes the Plot: Due to Sarah Sutton being the only Fifth Doctor companion (apart from Nicola Bryant) being readily available to Big Finish for a long time^note — as well as Author Appeal from Peter Davison, a longtime Nyssa fanboy — Nyssa's character was expanded as a matter of utility.
Sacred First Kiss: She has her first kiss with an English boy in Stockbridge. The moment shocks her — all her life, she'd imagined it as a logical thing, something that might happen and that she would have to deal with as part of a larger process, but the moment comes and goes very quickly and naturally. She gives the relationship a go, but soon realises that she has a lot to learn and she hasn't found the right person yet.
Science Hero: Can keep up with the Doctor, and does much autonomous research while he's busy with other plotlines. He even trusts her to repair the TARDIS all by herself at times, and she tells him outright that she is twice the biochemist he is. The Doctor doesn't disagree.
Sickeningly Sweet Talked about in "Circular Time" Nyssa takes advantage of her and the Doctor's downtime to write a memoir (framed as a fantasy book) about her home before it was destroyed. Playfully, Andrew needles her about the tedious blissfulness of Traken and lack of any meaningful antagonist. Nyssa confesses that, once the true villain enters her story, the book will end—and she will no longer be able to entertain the fantasy that her world exists somewhere.
The Spock: She does show a flicker of dry wit whenever the Doctor's plans go tits up on him again, but Earth humor mostly goes over her head.
Nyssa: I am not a princess.
Korky: Aye, but yer close 'nough that you couldn't tell that was a joke.
Technical Pacifist: In "Spare Parts", Nyssa becomes trapped in the TARDIS as it's being swarmed by Cybermats. Finally, she has enough and electrifies the outer hull, which she describes as "worryingly satisfying."
Timey-Wimey Ball:
- After witnessing the Fifth Doctor's regeneration during a telepathic meeting ("Circular Time-Winter"), Nyssa is reunited with the Doctor, Tegan and Turlough from a point where they have just left her on Terminus a few days ago while fifty years have passed for her.
- After Nyssa is left behind in E-Space, the Eighth and Tenth Doctors meet Nyssa while she is running a hospital ship and dealing with the fallout of the Time War, apparently at a point before she was reunited with the Fifth Doctor (always assuming that the temporal complexity of the Time War means that these events 'always' happened for her).
Trapped in Another World: Her (presumably) final fate, having chosen to stay behind in E-Space.
You Can't Go Home Again: Well, the Doctor does take her back to Traken... a few thousand years into her past, before her people exchanged fanaticism for science. The Trakenites are as litigious as ever, though, severely testing the Doctor's temper as he's forced to jump through bureaucratic hoops to prove they're not heretics.

Tegan Jovanka

Tegan Jovanka (Fifth Doctor)

"Will you stop holding time's hand for one minute? It's bigger than you are, it can look after itself."

Voiced by: Janet Fielding

The Doctor: Am I sensing a certain hostility from you?

Tegan: Spot on.

— "The Gathering"

Janet Fielding agreed to do one, and exactly one, audio for Big Finish, set after her travels with the Doctor. However, she enjoyed the experience enough to come on board properly in 2010, and Tegan now travels rather regularly with the Fifth Doctor and his other companions in tales taking place during their time on the show together, both in the monthly range as well as in the Lost Stories. Her return had the benefit of expanding the types of Fifth Doctor stories that Big Finish could make as well as the time period in which they were set, as Tegan travelled with the Fifth Doctor for longer (at least on screen) than any of his other companions, and her absence meant that a lot of stories with either Nyssa or Turlough had to be squeezed into ambiguous gaps between certain episodes to justify Tegan not being there. In Big Finish stories, Tegan is just as brash and blunt as ever, but the audios give her a bit more Character Development and focus on personal issues that the TV series simply ignored, as well as putting a greater emphasis on her humor.

"Ass" in Ambassador: Tegan is appointed as Gallifrey's Ambassador to Earth, so she likes to introduce herself by her title to other Time Lords for no other reason than to annoy them.
Call-Forward: "Cold Fusion" has her putting on the fur coat she would later wear throughout The Five Doctors.
The Constant: The Doctor relies on her as this during the events of "Secrets of Telos", "God of War" and "The Auton Infinity", when a very young Fifth Doctor is bounced all around different points of his own timestream. He notes Tegan as the only one of his companions to have remained with him for all that time and thus the only person able to keep him up-to-date on everything that has happened between his time jumps, and he makes sure she knows how grateful he is to her for her loyalty. Ironically, he tells her this almost immediately before she makes the difficult decision to leave him for good.
Crazy-Prepared: When a robot bouncer asks to see some identification during "Cold Fusion", set very early on during her TARDIS travels, Nyssa is surprised that Tegan just happened to have brought her passport with her from the TARDIS. Tegan apparently walks around with everything she might need to jump ship to Heathrow and begin working as an air stewardess at any given moment, even during situations where that is incredibly unlikely to happen.
Deadpan Snarker: Actually amplified in some episodes compared to the old days in The '80s.
Demonic Possession: Since Tegan's back, so is the Mara, during the episode "Cradle of the Snake". It's just as traumatic for her the third time around.
Doom Magnet: Even when she's not travelling in the TARDIS, Tegan seems to attract (or be drawn to) alien menaces wherever she goes. Her high school boyfriend is body-swapped with a giant insect, her more recent boyfriend is a robot using her because she travelled in time and even decades after leaving The Doctor she manages to get caught up in a Cybermen plot. Her Jade-Coloured Glasses as detailed below are not exactly unjustified.
Emergency Impersonation: In "The Lady of Mercia", she manages to pose as a 10th century warrior queen by virtue of being scary and loud. She passes herself (and Adric) off as dangerous mercenaries in "Kingdom of Lies" for much the same reasons.
Genre Savvy: She has been through enough madcap adventures and near-death experiences to recognize the typical hallmarks of a Doctor Who story about to kick off.
Nyssa: The Doctor has been gone a long time. Do you think we should go after him?
Tegan: Oh, no, no, no. I know how this story ends. The Doctor tells us to stay put, we wander off, we get captured, lots of people are shot and it all ends badly. I'm sorry Nyssa, but no.
Jade-Coloured Glasses: Even as a young woman Tegan was never the most positive or optimistic person, but the older Tegan from "The Gathering" has become deeply disillusioned with life back on Earth, especially after ending up in a career and an environment that wouldn't be particularly fulfilling to anyone, much less somebody who's seen the wonders of the universe.
The Knights Who Say "Squee!": When meeting Harry Houdini.
The Lad-ette: Emphasized during "The Gathering". Now in her mid-forties, Tegan is much more prone to harsh language, doesn't hesitate to order a strong drink at any bar she happens across, and when a friend tries to cover for her work absences by inventing a story about the two of them going shopping together, absolutely nobody believes that Tegan would take time out of her day to go to the mall.
Lame Pun Reaction: She just can't let a terrible pun go by, not even in life and death situations.
Tegan: Electronic life? What are we talking about, here, digital insects? Computerized birds?
The Doctor: Fish in chips?
Tegan: All right, get out.
Limited Wardrobe: Her season 20 white-corset-and-shorts ensemble is explained in "The Elite" when she comes back on board the TARDIS after "Arc of Infinity": The Doctor put all her belongings into storage during her time away and he can't remember where he put them. Tegan moans that she'll have to wear the same outfit for weeks.
New Old Flame: Tegan gets two: high school boyfriend Mike in "Hexagora", and recent ex Kyle in "The Waters of Amsterdam".
The Nicknamer: Usually with a Shout-Out. Robots get called "Metal Mickey" or "Tik-Tok", Sontarans get "Napoleon", giant tigers get "Pussy Galore"...
Odd Friendship: With Cicero, who appreciates her straightforward nature even though her casual ribbing of him pokes holes in his stuffy demeanour.
Open Mouth, Insert Foot: As always, Tegan's mouth is just as likely to get her in trouble as any alien or monster she comes across.
Only Sane Man: Despite her reputation, the audio stories progressively show this aspect of Tegan as time goes on, tying into the Doctor's assessment of her as a 'coordinator' during "Castrovavla". She manages to keep her head when the more typically even-keeled Doctor and Nyssa go a bit off the rails during "The Children of Seth", she is the only one in "The Butcher of Brisbane" not so caught up in alien attacks and political intrigue that she can't think about the innocent lives on the line, and in "Conversion", when the Doctor is at his most unhinged facing off against the Cybermen that killed Adric, it's she who stops him from doing something truly dangerous.
Phrase Catcher: When Tegan inevitably puts her foot in it, the Doctor will try to quiet her with a strained "yes, thank you, Tegan". It rarely works.
Pop-Cultured Badass: On audio, Tegan is much more prone to slinging around "modern" references, usually as part of her role as The Nicknamer. Since she is the only human on board the TARDIS and they rarely travel to her own time period, her references usually go over everyone's heads.
Precision F-Strike: In "The Gathering", she calls Jodi a 'bitch'. It's not unjustified, given the circumstances, but coming from a character last seen during the decidedly G-rated television stories, it's quite shocking.
Sarcastic Devotee: She wouldn't be Tegan, otherwise.
The Slow Path: At the end of "The Edge of the War", Tegan is separated from the Doctor and Nyssa for a year, stuck in the French village of Villy in 1939. She spends it with her new boyfriend, soldier Armand, and says nothing when he goes off to a battle that she knows will end in his death in order to preserve the Web of Time.
Taking the Veil: An amateur-built time machine simultaneously sends Tegan back to 918 A.D. and replaces her with Æthelfrid of Mercia. Worryingly, the real Æthelfrid is due to fight a decisive (and doomed) battle with the Danes that same morning. At the end, the Doctor manages to safely deposit Æthelfrid at a convent, where she will vanish into the mists of history. Before he returns in the TARDIS, though, Tegan is stuck pottering around the convent for a week, and she is not happy about it.
Too Spicy for Yog-Sothoth: Tegan manages to terrify the psychic rats in "Rat Trap" into leaving her alone by overloading their minds with her disturbingly vivid memories of The Mara. Rats really don't like snakes.
Touched by Vorlons: Theorized in-universe, but not outright confirmed. In "The Lady of Mercia" she has a psychic vision of a tenth century battle when she looks at a sword used in that fight. Since nobody else experiences anything like this when around the sword, the Doctor wonders if she might have picked up some kind of time sensitivity during her travels with him.
- It's also implied to be a Blessed with Suck case in "The Gathering", when Tegan learns that her brain tumor was also picked up at some point during her time on the TARDIS, making its origin something unidentified, but definitely alien.
You Will Be Beethoven: "The Lady of Mercia" has her spending some time impersonating a historical warrior queen. All she really has to do is put on the outfit and shout a bit to have the locals convinced.

Vislor Turlough

Vislor Turlough (Fifth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/turlough_2.jpg

"Ladies and gentlemen, you're flying Certain Death Airways! Very shortly, we'll be catapulted into the air by a vast explosion, prior to reaching our destination in a million tiny pieces."

Voiced by: Mark Strickson

"You might say, 'surely, being instructed to cheat and kill someone by an evil voice in your head can't possibly be worse than public school?' And I will say, all things considered, it was about the same."

— Turlough, "Gardens of the Dead"

Travelling with the Fifth Doctor, Turlough is typically not in the mood to deal with humans, with Earth, or with having to play the hero sometimes. Big Finish stories with Turlough tend to emphasize his Lovable Coward tendencies, while also framing him as a bit of a Pragmatic Hero and a deeply snarky Only Sane Man. His past on his home planet of Trion gets touched upon, as well as the lingering guilt he feels for having tried to kill the Doctor under the Black Guardian's influence. Turlough has several solo outings with the Doctor set before his departure in "Planet of Fire", as well as multiple adventures with Tegan and Nyssa, the latter of whom rejoins the TARDIS crew after leaving in "Terminus".

Butt-Monkey:
- The majority of his adventures take place on Earth, his absolute least favourite planet in the galaxy. He keeps begging the Doctor to go for a holiday on the planet of warm beaches and cute girls. The Doctor ignores him.
- In "Trap For Fools", out of all the possible places in all of space and time, the TARDIS arrives at an alien school in the far future that models itself on old-fashioned English public schools, like Brendon. The Doctor cheerfully deploys Turlough to go undercover and be a boarding school student again, his worst nightmare.
Deadpan Snarker:
Fifth Doctor: Where is your sense of adventure?
Turlough: In my room in the TARDIS, in a box marked "sense of adventure".
Enemy Without: In "Loups-Garoux", a group of werewolves hypnotizes him into seeing a visual manifestation of his dark side. It really scares him.
Fish out of Water: The Doctor tries to show him all the best parts of Earth and to teach him cricket. It doesn't take, mostly because Turlough looks down on Earth so much that he prefers to be a fish out of water.
Genre Savvy: He has an uncanny sense for impending adventure, though, being a Lovable Coward, he mostly uses these instincts to try and remove himself and the others before they get sucked in. It never works.
Lovable Coward: His first action when faced with danger tends to be to run to the nearest place of safety or even re-enter the TARDIS, to both the amusement and annoyance of the rest of the TARDIS crew.
New Old Flame: Meets up with an old girlfriend of his in "Kiss of Death". Subverted when she's actually working with the bad guys of the story, and dies in his arms when she rejects them.
Not What It Looks Like: In "The Lady of Mercia", the Doctor and Turlough bear witness to some illicit affairs going on in the University of Frodsham physics department: a lively couple is shagging their students and faculty both. A jealous preppie barges into the lab and spots the wife with Turlough, who is also wearing a school uniform. Things being what they are — and Turlough being Turlough — it isn't long before Turlough gets socked right in the nose.
Obsessed with Food: His primary motivation during the first half of "Phantasmagoria" is to find something to eat. Only when he finally gets to feed his face does he properly tune in to the plot.
Older and Wiser: Long after he left The Doctor, an older Turlough relates the story "Gardens of the Dead", and he swears that he has become this trope in his old age, even being considered downright respectable.
Pragmatic Hero: Insists that he is this when other characters accuse him of being a Dirty Coward, and indeed his devious nature and moral ambiguity actually help to save the day more than once. These tendencies do lead to a huge argument with the Doctor in "The Entropy Plague", when Turlough suggests offering up a criminal to a life-draining device rather than one of the TARDIS crew sacrificing themselves, reasoning that all the good they do in the universe means they deserve to live over a murdering thug.
Real Life Writes the Plot: Mark Strickson no longer lives in the UK, which meant that Turlough stories were intermittent for a long time; there were just three between 1999 and 2005, then nothing at all until 2010 bar a Companion Chronicle. With advances in technology making it possible for actors to record their lines from elsewhere when need be, from the 2010s onwards there are usually at least a couple of stories featuring Turlough released each year.
Reluctant Hero: As always, Turlough enjoys travelling in the TARDIS, but not the day-saving that is usually required.
Hannah: *screams*
Turlough: Oh, no. I suppose I have to do something about this.
The Slow Path: Spends three years stranded on Earth with Nyssa in the 51st century after an attack on the TARDIS separates them from Tegan and the Doctor.
Sour Supporter: Like Tegan, he'll follow the Doctor to the ends of the universe, but he has no qualms about pointing out when The Doctor really hasn't thought things through or suggesting that they'd all be better off minding their own business.
Unrequited Love Lasts Forever: "Gardens of the Dead", narrated by an older Turlough, heavily implies that he has always carried a bit of a torch for Nyssa, and he's certainly much more relaxed and kind around her than he is with Tegan.
What the Hell Is That Accent?: Whenever he narrates Tegan's dialogue in a Companion Chronicle or Short Trip. Mark Strickson's attempt at an Australian accent has to be heard to be believed.
Why Did It Have to Be Snakes?: Being back in a public school during "Trap for Fools" is basically his living nightmare.
You Can't Go Home Again: He's tremendously homesick at times.

Kamelion

Kamelion (Fifth Doctor)

Voiced by: Jon Culshaw

The many, many problems with the Kamelion prop on the TV series are happily non-existent in an audio format, and Big Finish found a way to work him in beginning in 2019. In these stories, Kamelion is actually allowed to venture outside of the TARDIS, and his personality is expanded to showcase his Undying Loyalty to the Doctor and his guilt over having tried to kill the team while under The Master's influence.

11th-Hour Ranger: In "Forty 2- The Auton Infinity", after the TARDIS interior is displaced from its exterior by the Master's latest scheme, Kamelion assists a mental duplicate of a younger version of the Fifth Doctor in programming the TARDIS to create a time rip that will allow them to dispose of the intruding Nestene Consciousness before it can manifest in this reality.
Androids Are People, Too: Part of Tegan's lesson during "Devil in the Mist" is that Kamelion is not a soulless machine, he has thoughts and feelings just like she does.
Blessed with Suck: He can sense emotions, tap information networks and transform into anyone or anything. But anyone or anything can also make him transform. "Devil in the Mist" shows that the other person doesn't necessarily need to be trying to influence him, as was the case with Tegan.
Creepy Monotone: Well, not always creepy, but it can be very disconcerting hearing him beg Tegan and the Doctor for help in the same calm, conversational manner he uses to say everything else.
Does Not Understand Sarcasm: And considering his travelling companions are Tegan and Turlough, he's really out of his depth.
I Just Want to Have Friends: He is completely devoted to the Doctor right from the jump, and he spends quite a lot of time trying his hardest to get Tegan to like him.
Involuntary Shapeshifter: Poor Kamelion really has no control over himself when someone starts to exert their influence on him, and he is always confused and somewhat upset when he comes back to himself and realizes what he's done.
The Other Darrin: Due to Gerald Flood's death, impressionist Jon Culshaw was called on to do Kamelion's voice.
Then Let Me Be Evil: A fairly tragic case, when it turns out he wasn't actually being controlled by the Monster of the Week at all, but only seemed to be because Tegan believed this to be the case, and he was locked onto her. It takes a lot of convincing to get him to back down, because all he wanted to be was what Tegan wanted him to be, even if that was a vicious monster.
Unexpected Character: During "Winter", the final chapter of the anthology story "Circular Time", where he is used as a pawn by the Master. Again.

Perpugilliam "Peri" Brown

Perpugilliam "Peri" Brown (Fifth and Sixth Doctors)

https://static.tvtropes.org/pmwiki/pub/images/peri_brown.jpg

Voiced by: Nicola Bryant

Unlike on television, Peri had many adventures with the Fifth Doctor before "The Caves of Androzani", travelling with him solo as well as with original companion Erimem. Her travels with the Sixth Doctor are also explored, and as his first companion, Peri stories with the youngest version of him are used to highlight the massive Character Development he received throughout his time at Big Finish, particularly once Peri returns for more adventures post-"Mindwarp" with a much older Doctor. Peri is treated with much more care and sympathy on audio than on television, making her into a relatable and dynamic character who regularly proves her mettle against the bad guys.

Break the Cutie: Big Finish took the TV series' habit of doing egregiously terrible things to Peri and took it deadly seriously, giving her a whole arc from her relatively carefree adventures with the Fifth Doctor to her increasingly traumatic ones with the Sixth. It recontextualises "The Caves of Androzani" into part of a Trauma Conga Line that involves her losing Erimem, then the Doctor she knows is replaced by an unstable and violent one. While she and the Sixth Doctor eventually learn to get along, her attempt to go home results in the death of all her loved ones. Then she dies. And it doesn't even end there.
The Cameo: After not appearing in a full cast Fifth Doctor story since 2008, Peri makes a brief, uncredited appearance at the end of 2022's "The Auton Infinity", where a mental clone of a very young Fifth Doctor is projected towards the end of his timestream and inhabits the body of his future self. He speaks with her for a few moments before they step out of the TARDIS and onto Androzani Minor.
Character Focus: "Peri And The Piscon Paradox" is two hours of Peri-centric comedy, followed by one hell of a Mood Whiplash.
Dead Alternate Counterpart: Inverted and enforced; during the Doctor's trial, Peri's timeline was altered and she was assassinated to discredit the Doctor by corruption within the offices of Gallifrey. However, realizing that the Doctor would likely take umbrage with a friend of his being killed by his own people, a new faction decided to instead have Peri be alive and married to King Yrcanos. However, another faction considered this to be akin to a fate worse than death, and so they set up Peri with another fate... and then another, and another. The heavy manipulation of her timeline splintered it so each fate we saw happened to a separate Peri, multiplying her. Suffice to say, the Doctor isn't pleased when he learns of this.
Future Me Scares Me: Peri gets a great smacking of this in "Peri And The Piscon Paradox", finding that she has become a cold-hearted, alien hunting secret agent. Neither past nor future Peri get along very well. Unfortunately, "Mindwarp" certainly happened, and the self the past!Peri observed is actually a version of herself the Time Lords created, among others, to try and avoid the wrath of the Doctor post-trial. And no, she's not a secret agent nor alien hunter - she's just a television host who has had a very bad marriage with her highschool sweetheart, and had to act the part to keep the Web of Time stable.
Head-Turning Beauty: Even Peri is starting to tire of being desired by everyone.
Heterosexual Life-Partners: Her and Erimem become fast friends. Which ends up just one more thing that makes her first meeting with the Sixth Doctor so traumatic.
I Need a Freaking Drink: After a while, she starts just disappearing in the middle of Six's lectures and wandering off to the nearest bar.
Law of Inverse Fertility: She would love to get Happily Married and have children someday. In "Peri And The Piscon Paradox", it's revealed that the copy of Peri who was returned to Earth became infertile due to severe Domestic Abuse.
Identical Stranger: Nicola Bryant finally gets to use her natural accent thanks to the hoary old trope of meeting her spitting image in a historical setting. It's Queen Anne in "The Church and the Crown". Someone else comments that Peri has a ridiculous accent — no comment.
Ms. Fanservice: Preview comics for the audio episodes tend to show off her... assets. In "Nekromanteia", she gets completely naked.
The Pirates Who Don't Do Anything: A bit of a Running Gag, as every time her skills in botany might come in handy, she gets interrupted by plot.
Pun: She admits she's a bit addicted to making them.
Real Women Don't Wear Dresses: She is more of a leotard and shorts kind of girl.
Single Woman Seeks Good Man: Poor, poor, poor Peri keeps fancying men who turn out to be villains. Or wife beaters. Or... well, you know.
The Slow Path: In "The Kingmaker", she and Erimem have to spend two years in Richard III's era before the Doctor can pick them up again.
Tomboy and Girly Girl: With Erimem. Peri's the girly girl, Erimem is a warrior who spends much of her Story Arc with a shaved head.

Melanie "Mel" Jane Bush

Melanie "Mel" Jane Bush (Sixth and Seventh Doctors)

https://static.tvtropes.org/pmwiki/pub/images/mel2jpg.jpg

Voiced by: Bonnie Langford

Mel's timeline got a bit wobbly as soon as she was introduced in the TV series, which Big Finish delights in making even more complicated. Stories starring her tend to be light-hearted and fun. Since the Seventh Doctor isn't quite The Chessmaster yet during their travels together (as he would eventually become with Ace), the two of them become quite adept at the Indy Ploy.

Author's Saving Throw: invoked Mel was a notoriously Flat Character in her brief tenure on the series, with much of her personality and interests being told to us by other characters. The Big Finish series rectifies this simply by writing her as the character we were told about rather than the one we saw- a brave, good-hearted and straightforward young Everywoman. It also helps that writers today understand her job of "computer programmer" better than Pip and Jane Baker did in 1986.
Beware the Nice Ones: Melanie Bush made Davros beg for mercy. She spent months believing he was a kind old crippled professor. Once it turns out Davros is a lying sack of crap and reverts to form, Melanie decides to leave him at the so-called mercy of his own creations: the Juggernauts. Who are Mechanoids enhanced with human remains. Just don't piss her off, really.
The Bus Came Back: She eventually leaves Glitz and ends up on the run before rejoining the Doctor and Ace, in stories beginning in 2016. Turns out Glitz, whom we last met selling out his own crew, sold her out too.
Ditzy Genius:
Mel: But, Doctor, we know they can't change history because we've seen the future already.
Seventh Doctor: No. Unfortunately there is an awkward thing called "free will".
Mel: Oh. You mean that predeterminism is merely a philosophical abstract and that the physical reality of the universe is the one in which all potential actions are permitted, including those whose effect cancel out their own logical cause?
Seventh Doctor: ... Yes, Mel.
Fish out of Temporal Water: She gets very annoyed at anything that's not The '80s.
Fun Personified: Although she can be plenty glum and snarky, she's almost always brought in when a story needs to be Lighter and Softer. To the point where two of her episodes are full-on Panto. And when her stories do get serious, you know something's very, very wrong.
I Need a Freaking Drink: After a while, she starts just disappearing in the middle of Six's lectures and wandering off to the nearest bar (exactly like Peri before her).
Love Freak: In the audio play "The Juggernauts" she tries to redeem Davros. Of course, she doesn't exactly have the long history with him the Doctor has, and she only just learned what Daleks are, but still...
New Old Flame: "The Blood Furnace" sees Mel randomly running into her old university boyfriend, Stuart, who just so happens to be involved with the aliens of the story. He offers her a job, which she initially accepts, but eventually decides she's just not ready to stop her TARDIS travels yet.
Reality Warper: In "The Wrong Doctors", its revealed that Mel's powerful memory and contradictory timeline actually gives her, under very precise conditions, the power to pick and choose among countless alternate realities and timelines, pulling them into being in a pocket universe version of Pease Pottage created by a demonic entity from the Time Vortex.
Real Life Writes the Plot: Bonnie Langford no longer lives in the UK, and the resulting scheduling difficulties meant there were no Mel stories released for some five and a half years between 2007 and 2013.
The Slow Path: She gets stuck in 1782 for six months.
Straight Man: Increasingly relegated to the role of the Doctor's keeper. Six is always indignant (forcing Mel to smooth things over), and Seven never shuts up (he can't craft a halfway-decent alibi without Mel backing him up).
Mel: Doctor, do you know what happened to Holmes in the end?
Seven: What?
Mel: Watson bashed him in the head with his own violin for being so aggravating.
Took a Level in Badass: Her time spent travelling with Glitz had quite the influence on Mel. By the time she meets the Doctor and Ace again in "A Life of Crime", she has become an expert safecracker, a cunning and devious businesswoman and nowhere near as much of The Ditz as she used to be.

Dorothy "Ace" McShane

Dorothy "Ace" Gale McShane (Seventh Doctor)

https://static.tvtropes.org/pmwiki/pub/images/ace_doctor_who.jpg

Voiced by: Sophie Aldred

Ace is just a bit older, now even more awesome, and travelling with the Seventh Doctor with no intention of ever stopping. She also appears in a few "Side Step" stories, which take place during the Doctor Who New Adventures.

Affectionate Gesture to the Head: She eventually kisses the Doctor, once, as a very sweet gesture of friendship. Since it's audio, feel free to imagine it as The Big Damn Kiss.
Break the Cutie: From her very first Big Finish episode onwards, she gets broken over, and over, and over.
Can't Stay Normal: Due to events involving the Word Lord, she ends up stuck in 2027 A.D. She makes a half-hearted attempt at living a normal life, but (despite finding a wonderful fiancé) ends up working with UNIT and through sheer determination eventually finds her way back to the Doctor against all odds. As soon as she can go back to the TARDIS, she abandons her fiancé without hesitation, though she cries over the life she might have had. She does try to leave a goodbye for him, and an explanation why she's going, but the Doctor (unknowingly) erases it, and she's too drained by the initial message to make another.
The Chessmaster: Shows off her skills extensively in "A Death In The Family", slowly but steadily outwitting a Reality Warper. She's shocked, in the end, by how well she did, considering it's usually the Doctor who does that sort of thing.
Continuity Snarl: Good luck working out if there's one, two or more Aces, and just where one begins and the other ends. Early on, Big Finish considered themselves in continuity with the Doctor Who New Adventures and Past Doctor Adventures (and specifically, Ace's history with Benny). Then they decided to politely ignore them. Now, with their more holistic approach to continuity, Ace can share new adventures with Bernice Summerfield, and there's adaptations of old ones, but it's difficult to say whether they come before or after her adventures with Hex^noteNot helped by the fact that different writers had different ideas about whether they were writing post-Survival young Ace or post-Deceit soldier Ace, often in consecutive episodes. Her appearances in Gallifrey and Class (2016) mean her history through the Time War and up to the new series is actually quite simple, but what exactly happened to her between "Survival" and then is much more complicated. Numerous stories have attempted to straighten it out:
- The Past Doctor Adventures introduced the first canonical Continuity Snarl into her personal history, involving her timeline-changing death as part of an arc in the Eighth Doctor Adventures in 1998. This story, written by Mike Tucker and Robert Perry, tracked into her early Big Finish appearances written by the pair and explained why her surname originally inconsistent.
- Gallifrey: Time War finally addressed the problem head-on by revealing that Braxietel had been manipulating Ace's timeline for some time. In both "Intervention Earth" and the novel At Childhood's End (written by Sophie Aldred herself) Ace remembers contradictory events, including the timeline where she died, and like Benny, she now remembers every version of her inconsistent history.
Determinator: In "The Shadow of the Scourge", she faces an Eldritch Abomination that talks its victims into crippling despair. Her solution? To have someone destroy her eardrums, because she knows the TARDIS medbay can just fix her up later. She spends over half the story completely deaf and with blood running out of her ears, and she's not even bothered.
Give Him a Normal Life: The Doctor regularly rotates out his companions, and Ace is a living demonstration of why. She's unstuck in time: no relationships, losing track of how long she's been travelled in the TARDIS, more and more willing to resort to unsavoury methods. If the Doctor wanted a chessmaster for a companion, he'd talk to himself.
Doctor: Picking up a gun? Launching a missile? Destroying a planet?
Ace: (Coldly) You've done it.
Doctor: You're not me! You were never meant to be!
Guile Hero: Taking a few levels in the trope, and trying to be more like the Doctor. She's not extremely good at it at first.
Hidden Depths: Her first adventure ("The Fearmonger") shows both her extreme fear of, and her total devotion to, the Seventh Doctor.
I Have You Now, My Pretty: David Tennant's character in "Colditz" has some very unsavoury intentions towards her.
In Love with the Mark: She immediately sets to work resurrecting the Doctor in "Death in the Family." Stranded as she is with a dying TARDIS, Ace spends several months dating a man named Henry Noone, a relationship that grows serious enough that Henry eventually pops the question. Ace ultimately abandons Henry, having taking advantage of his surname to compete with Nobody No-One. But it’s clear that there was genuine affection for him, which greatly pleases Nobody No-One.
Nobody No-One: Better keep an eye on your monkeys, Mister Organ Grinder. They're learning to play music without you.
Long-Lost Relative: Her brother Liam.
Nice Job Breaking It, Hero: While studying at Time Lord Academy, she goes rogue and tries to destroy Skaro far into its past. And fails, miserably.
The Nicknamer: "Oldman Whitehair, Beatles Haircut, Frilly Shirt, Longscarf Bigeyes, Cricket Boy, Joseph And His Amazing Technicolor Dreamcoat, and Lord Byron..."
Ship Tease: Quite a bit of it with Hex, though she mostly just sees him as a little brother.
Story Arc: The benefit of having been the Doctor's companion when the TV series was cancelled is that Ace's story was never given an end, meaning writers don't have to worry about colouring too much outside the lines with her adventures. As such, Ace is the rare companion to get a major story arc of her own in the monthly adventures, and her life is (roughly) progressed ahead at a slow but regular rate. The early episodes tend to also be understandable as standalone stories, though.
The Last Straw: Suffice it to say, the Doctor Ace travels with has left her with a number of grievances, particularly in how he continues to manipulate allies as though they were part of a game even when it's brought up how distrustful it makes said allies and makes them have a bad tendency of messing up otherwise sound plans they aren't aware of. This has made her threaten to leave the TARDIS a number of times, but they never held until the Doctor deliberately allows Jan to die in the adaptation of "Love and War". Sick of the constant manipulations, and having lost yet another person she cared deeply over in the name of a plan to fight the monsters, Ace leaves the TARDIS.
Took a Level in Badass: The Doctor manages to enrol her in Time Lord Academy (after at least one failed attempt), and she becomes a Celestial Intervention Agency operative. This was originally planned for the TV series.
- In a more understated one, Ace learning how to pilot the TARDIS without training, culminating in her actually being able to roughly pilot it in "Afterlife". "Signs and Wonders" showcases a much better departure.
Vague Age: By the time Ace meets Hex, she's in her late teens or very early twenties, old enough to go undercover among adults without comment, but it's strongly implied she's been travelling so long she's lost track of her own age. (The Continuity Snarl mentioned above doesn't help, either, since different writers clearly had different ideas about whether they were writing a post-"Survival" teenager or a post-VNAs young adult.)

Cass

Cass Fermazzi

Voiced by: Emma Campbell-Jones

While the Eighth Doctor and Cass only met on his final day, due to the ever shifting timelines of the Time War, Cass is depicted as travelling with the Doctor and Alex.

Rose Tyler

Rose Tyler (Tenth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/rose_8.jpg

Has her own page.

Captain Jack Harkness

Has his own page.

Donna Noble

https://static.tvtropes.org/pmwiki/pub/images/doc_compan_5593.png

Voiced by: Catherine Tate

Be Careful What You Wish For: In "Death and the Queen", Donna meets a gorgeous, nice prince of a tiny little country, and wouldn't you know it, he likes her. By the time the Doctor catches up, Donna's already gotten sick of having to actually live in pre-Industrial Revolution monarchical conditions, even without the mother in-law from hell. And then it turns out her new beau's country occasionally needs to sacrifice a person as part of this bargain they've got going...
"Begone" Bribe: The Doctor and Donna run into a guy playing bagpipes really badly. Donna gives him her watch to make him shove off in “Time Reaver”.
Blatant Lies: She tells the Doctor about all the perks of being royalty. These are immediately shown to be lies, showing Donna moaning about every little part of being pre-Industrial Revolution royalty (handmaids following her every movement, no indoor plumbing, having to wait for her boyfriend to come home with dinner, a mind-bogglingly obnoxious mother in-law).
Buffy Speak: The "wheely thing", by which Donna means "roulette".
The Bus Came Back: Catherine Tate came back after her time on the show to voice the role of Donna.
Changed My Jumper: In "Time Reaver", she changes into something unspecifically "wench-y", just in case she and the Doctor (but mostly her) stumble onto a Planet of the Boys (who may or may not be dancing around in their underpants, for no particular reason).
Character Development: While Donna still asks the Doctor if they can do anything about the smog pollution of London in "The Creeping Death", unlike when they visited Pompeii she accepts his assurance that he'll do as much as he's allowed rather than keep insisting that he try and save everyone.
Closest Thing We Got: The Donna Noble: Kidnapped! miniseries sees Donna basically forced to act as the Doctor when she and her friend Nat are abducted and Donna has to set the TARDIS in flight to escape.
Confronting Your Impostor: In "The Chiswick Cuckoos", Donna returns home after a month away to discover that a copy of her has been living with Sylvia while she was away.
Dramatic Irony: At the very end, Donna says she knows the only way she's going to get a happy ending is if she stays with the Doctor...
Mistaken for Romance: The old running gag of Donna and the Doctor being mistaken for romantic partners crops up once more, in "Technophobia" and "Death and the Queen".
Mistaken for Special Guest: In "The Sorcerer of Albion", Donna is basically mistaken for Merlin when an aspiring sorcerer thinks he's summoned the TARDIS.
Of Corset Hurts: At the end of “Time Reaver”, Donna mutters that if the Doctor wanted to experience prolonged agony, he could've just gone wench-y like she has.
Royals Who Actually Do Something: When "Death" starts attacking Goritania, Donna tries rallying the people, and has them sequester themselves inside the castle for safety.
Running Gag: Once more, the Doctor and Donna are mistaken for lovers, this time by the Queen of Goritania thinking the Doctor's come to steal her back.
Shipper on Deck: Donna shows full support for Terry and Richard's relationship in "The Creeping Death", which surprises both as they're obviously not used to people being so casual about homosexuality in the 1950s.

Rory Williams

Has his own page.

Kazran Sardick

Kazran Sardick (Eleventh Doctor)

Voiced by: Danny Horn (2016, 2018)

Future curmudgeon and controller of the cloud belt machine, for now the Doctor visits him every Christmas Eve in an attempt to change him for the better. Before meeting Abigail he would like a good story to tell her so the Doctor indulges him the best way he can think of.

River Song

Has her own page.

Big Finish has introduced many new companions, who travel with the Doctor and sometimes afterwards have adventures without him. Some, specifically several of those who traveled with the Eighth Doctor, made it into TV series canon as of his regeneration story "The Night of the Doctor".

The companions listed here are sorted in order of their first appearance in Big Finish.

Several characters from other Doctor Who media also appear in Big Finish, or appear most prominently in Big Finish ranges with their own Tropes pages. For tropes relating to Bernice Summerfield and Bev Tarrant, see here; for Frobisher, Maxwell Edison and Izzy Sinclair, see here; for Fitz Kreiner, see here; for Iris Wildthyme, see here; for Chris Cwej and Roslyn "Roz" Forrester, see here; for Narvin, see here.

See also the Doctor Who Expanded Universe character sheet for Jimmy Forbes and Jenny Wilson and for miscellaneous characters, and the index of Doctor Who character sheets for a general overview.

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Dr. Evelyn Smythe

Dr. Evelyn Smythe, later Evelyn Rossiter (Sixth and Seventh Doctors)

https://static.tvtropes.org/pmwiki/pub/images/evelyn_2591.png

Debut: "The Marian Conspiracy" (2000)

Departure Story: "Thicker Than Water" (2005)

Voiced by: Maggie Stables (2000–2011)

"I'm a historian. This is a time machine. You can take me anywhere... and I'll still be home in time for tea."

One of the Doctor's rare older companions, 55-year-old history professor Evelyn Smythe could also match the Sixth Doctor's acid tongue — a rare bird indeed. Evelyn is by far one of the warmest, friendliest and most emotionally involved companions that the Doctor has ever had. On the one hand, this mellows him out considerably, and the two of them become incredibly close. On the other hand, though, Evelyn can't even begin to cope with the amount of pain and death that a TARDIS traveller sees, and although she tries to stay brave, every friend she loses breaks her heart.

Alternate Universe Reed Richards Is Awesome: "Girl in a Bubble" presents an alternate timeline where Patricia McBride/"Purity" was able to put her plans to remake society into action. In a reality where she never met the Doctor, Evelyn was one of the first people to discreetly oppose this regime due to her knowledge of history, setting up a longer-term underground movement that continued operating even after Evelyn died of her heart condition trying to protect someone else.
Anachronic Order: From "Thicker Than Water" onwards, her episodes get released out of order.
Anguished Declaration of Love: A platonic one to the Doctor.
Badass Teacher: She's a history teacher. And she's badass. She also knits sweaters for her students.
Break the Cutie: She tries to stay brave throughout her adventures, but the cracks begin to form at the end of "Jubilee". She starts to properly break in the middle of "Doctor Who And The Pirates". "Project: Lazarus" sees her finally unable to cope with the Doctor's lifestyle.
Continuity Snarl/Alternate Continuity: Her appearance in the Past Doctor Adventures novel "Instruments of Darkness" features Evelyn leaving the TARDIS in a completely different manner to her eventual finale years later in "Thicker Than Water", mostly due to Big Finish's changing attitudes to cross-medium continuity. And the cliffhanger ending to "Real Time", where the Cyber-controller was actually a future Evelyn was left unresolved due to the BBC abandoning the webcast format. Presumably it was wrapped up in an unseen adventure later.
- The most likely explanation to reconcile "Instruments of Darkness" and "Thicker Than Water" involves the Doctor, Evelyn and Mel experiencing some adventure after "Instruments" that erased Mel's memory of meeting Evelyn, and the other two had to keep that detail secret to avoid causing Mel further mental damage.
Cool Old Lady: Cool enough to chill out Six. (A little.)
Cybernetics Will Eat Your Soul: In "Real Time".
Deadpan Snarker: She is naturally quite straightforward, but the Doctor's more boastful rants tend to bring out this side of her.
Foreshadowing: Thanks to Big Finish releasing episodes in whatever Anachronic Order they like, the Doctor often fondly remembers Evelyn in episodes taking place after she leaves team TARDIS... which are released long before we know why she leaves team TARDIS.
Genius Sweet Tooth
Granny Classic: Evelyn undeniably has a touch of this to her. Her age gives her a strong air of authority and she can be quite stern and stubborn, when she feels the situation calls for it, but more often than not, she is warm and nuturing, and she is unquestionably quite wise, often serving as a voice of reason for the Doctor. And she bakes a mean chocolate cake.
Happily Married: To Rossiter.
Hard-Drinking Party Girl: Evelyn regularly parties with her students, and recalls taking part in a yard of ale drinking contest with them.
The Doctor: Who won?
Evelyn: Oh the yard of ale, definitely.
The Heart: A serious contender for the warmest, kindest, most emotionally involved companion the Doctor's ever had. While her positive influence manages to push Six into quite a bit of Character Development, she also slowly learns that those qualities are not at all suitable for the amount of death and pain a TARDIS traveller tends to see.
Heroic Sacrifice: Helping the Doctor take out a being of nearly ultimate power, at the cost of her own life... as she was already dying, Evelyn was more than willing to ensure her end happened on her terms.
I Choose to Stay: With Rossiter.
It Never Gets Any Easier: Evelyn's main arc revolves around her coping with all the death that follows in the Doctor's wake. He seems to take it all in his stride, while she, well, doesn't. What she takes away from it is that there is no happily ever after, because life has no ever after, just days that are happy and days that are sad. And as long as one person cares, you can keep on living until the next day.
Jumped at the Call: Six doesn't get any say in whether or not she gets to be a companion, since she's already made up her mind just minutes after they first meet (well, after he proved he wasn't a lunatic anyways). As we find out much later, it's partly because she suffered a heart attack not too long before, and the university wanted to try and force her into retirement.
Married to the Job: Almost literally, in that she divorced her husband so she could spend more time at work.
Medical Horror: Especially in "Real Time" and "Thicker Than Water".
Morality Chain: She really brings out Six's softer side, and he grows to care tremendously for her. She also calls him out hard when he puts on a brave face and pretends that everything's fine when it very clearly isn't.
Non-Action Snarker
Not That Kind of Doctor: She often has the same problem as the Doctor when describing herself.
Older Sidekick: She seems noticeably older than the 40ish Sixth Doctor, though she technically isn't.
Old Maid: One of the oldest companions the Doctor has ever had.
Parental Substitute: Eventually becomes one for Hex.
Screw Politeness, I'm a Senior!: Usually, Evelyn's a perfectly friendly old dear, but when she needs to get her way...
Scout-Out: In "The 100 Days of the Doctor", Evelyn, bewildered by the implications of regeneration, asks if the Doctor loses all of his accumulated life lessons. Six searches for a positive spin to put on this; he suggests that one keeps the memories, but views them from an outsider's perspective. This reminds Evelyn of another one of life's great hurdles:
Doctor: The ultimate mystery of the Time Lords... is like signing on with the Girl's Junior Scout Troop. That's... one of the most spectacular similes I have ever heard attempted.
Spot the Impostor: Evelyn identified a man calling himself "the Doctor" as a fake because he didn't know anything about the Daleks.
Thanatos Gambit: A future Evelyn, now on her deathbed, manages to trick the Word Lord into becoming trapped in her mind as it slowly shuts down.
Your Days Are Numbered: She's hiding a serious heart condition from Six, and part of the reason she wants to travel in the TARDIS is to live life to the fullest while she still can.

Erimem

Princess Erimemushinteperem (Fifth Doctor)

Debut: "The Eye of the Scorpion" (2001)

Departure Story: "The Bride of Peladon" (2008)

Voiced by: Caroline Morris (2001–2008)

"I believe in real things. I have heard of men who study the stars."

Erimem is a daughter of Pharaoh Amenhotep II. Rescued by the Fifth Doctor and Peri from Ancient Egypt 1400 B.C. after a few complications involving her impending coronation, she travelled the galaxy with the Doctor to learn about different times and places. Also appears in a number of prose stories and novellas and the solo full-length novel The Coming of the Queen, and subsequently in her own book series by Thebes Publishing.

Abusive Parents: Comes with the time period, but it's revealed in "The Roof of the World" that her father planned to have her tossed to the lepers for accidentally seeing something she wasn't supposed to. And she only finds out about this in limbo. But as it turns out, it was all to protect her and the rest of the world.
Action Girl: She was trained in sword(wo)manship by the Captain of the Royal Guard. Comes in handy when they visit Three Musketeer-era France.
Ambadassador: She's extremely adept at political negotiations... but not mature enough to judge when to stand up for her convictions and when to simply keep silent. When push comes to shove, she can also fight her way out.
Ancient Egypt:
Attempted Rape: In "Nekromanteia", in an attempt to make the series a bit Darker and Edgier, Erimem is almost raped but manages to fight off her attacker. (Fan reception of the episode was overwhelmingly negative, and the author was never hired to write for Big Finish Doctor Who again.)
Badass Normal: Erimem never just sits back when there's trouble.
Beware the Nice Ones: Has a habit of casually breaking people's arms when they try to touch her in less pleasant ways.
Blue Blood: Being born under the king of Egypt will do that to you, though she doesn't flaunt it.
Break the Cutie: She definitely has her moments. Nearly being raped in "Nekromanteia" for one, being convinced she was dead in "The Roof of the World", and seriously considering suicide in "The Kingmaker". She powers through, regardless, if a bit weathered.
Brother–Sister Incest: Was engaged to her brother before his untimely death, and rather excited about the prospect.
Deliberate Values Dissonance: She sees nothing wrong with corporal punishment and a moderate level of fascism, if it's for the good of the people. This becomes very interesting when she gets into a sort of romance with Vlad III, Prince of Wallachia... a.k.a. Dracula.
Driven to Suicide: In "The Kingmaker", although seeing Peri's reaction to the idea stops her. She pretends it was all just a joke, but later reveals to the Doctor that she was deadly serious, and that she feels tremendously guilty for lying about it to Peri.
Guile Hero: Years of court etiquette gives her a lot of skill in manipulating people. She effortlessly talks her way into the King of France's court, and manages to stay in Count Vlad's good graces despite the very hostile environment.
Fake Nationality: Erimem's Egyptian. Her actress is most certainly not.
Faking the Dead
Fish out of Temporal Water: Frequently. "The Veiled Leopard" has her in a bodice and high heels, wanting to try 1960s French fashion. She immediately regrets that decision when she realises she can't properly move anymore.
Friendship Moment: In "No Place Like Home", she and the Doctor quickly bond over how dreadfully stuffy and ceremonial their respective civilisations are. She also learns that he's technically the President of Gallifrey, and that he's on the run from it, just like she is. She and Peri have many besides.
Heterosexual Life-Partners: Mainly with Peri. They're the equivalent of gossiping girls when around each other.
Rebellious Princess: A textbook example.
Royals Who Actually Do Something: She sees no reason to not go into battle with her troops, and is quite able to rally an army should she need one.
The Slow Path: In "The Kingmaker".
Team Pet: Antranak, a stray cat she dragged along during her hasty escape from ancient Egypt. The Doctor really doesn't get along with Antranak, but tolerates the cat for Erimem's sake.
Translator Microbes: An odd aversion to the trope; though the TARDIS allowed Erimem to converse with people who didn't know Egyptian just fine, she had to be taught by Peri over the course of several adventures how to read and write English. Before that, she only knew (and could read) Egyptian hieroglyphs. It's never elaborated on whether or not this was a problem with the translator circuit that was later fixed.
Tomboy and Girly Girl: With Peri. Peri's the girly girl, Erimem is a warrior who spends much of her Story Arc with a shaved head.
The World Is Just Awesome: When she first joins up with the Fifth Doctor, she's never ever heard of tea. The Doctor promises to take her out for snowball fights and ice cream and anything else she's never seen before. Her travels leave her in a perpetual state of wonder, though due to her excellent etiquette, she's never too much of a Fish out of Water.

Charley Pollard

Charlotte "Charley" Elspeth Pollard (Eighth Doctor and Sixth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/charley_1509.png

Debut: "Storm Warning" (2001)

Departure Story: "The Girl Who Never Was" (2007)

Voiced by: India Fisher (2001–2010, 2013–present)

Charley: Did they have orgies?

Eighth Doctor: CHARLOTTE POLLARD!!!

Charley: I went to an orgy once... I didn't stay.

Edwardian adventuress Charlotte Pollard ran away from her boring life among the upper crust in 1930, only to be nearly killed in an airship crash. Fortunately, the Eighth Doctor was around. Charley is a pragmatic and very adventurous young lady who strongly values Brutal Honesty, making up for her lack of life experience with a willingness to try anything once. Got her own spin-off, and technically the longest-running companion by continuous, uninterrupted years in all performed Doctor Who - Fisher and Paul McGann recorded together from 2001 to 2007 and then she did another two years opposite Colin Baker.

Alice Allusion: In "Zagreus", she's forced to take on the role of Alice, take up the Vorpal sword, and fight the Jabberwock. It turns out that the TARDIS was trying to save reality itself by confusing Zagreus into submission, using the most nonsensical thing she could possibly find in Charley's head: her memories of reading Alice in Wonderland.
Anguished Declaration of Love: She and the Doctor exchange one, though they both mean different things by it, in "Neverland". Things get extremely out of hand after that in "Scherzo".
Be Careful What You Wish For: She very much wants to become a mother. The idea is explored in a variety of creative ways, none of which are at all fun for Charley.
The Big Damn Kiss: With the Doctor in "Scherzo". It's played for terrifying, indescribably gruesome Body Horror.
Brainwashed and Crazy: Seemingly falls victim to it every second story, may actually have toppled Sarah Jane and Leela as the most brainwashed companion.
Breakout Character: One of the most popular Doctor Who companions ever, lasting four entire story arcs: her initial run with Eight, the Divergent Universe arc, her second arc with Eight, and her run with Six. After which she promptly got her own spinoff. Also the only original Big Finish character to come back for the Big Finish 50th anniversary, and the first Big Finish companion to be mentioned by the Eighth Doctor in his return to the screen. She's the first Big Finish character to appear in Doctor Who Legacy, too. Word of Moffat has it that she was also with Eight during the climax of "The Day of the Doctor", standing just offscreen.
Brutal Honesty: Like her description above says, she's a big fan of it.
Buffy Speak:
A 'thingamy' was a tool, one hit someone else with a 'dooda', and a 'whatsit' bleeped. One could always combine them, of course. 'Thingamydooda' would suit a space spanner, for example. Once, for variety, she had tried out 'oojamaflip', but she’d found it rather common.
Canon Immigrant: Mentioned in "The Night of the Doctor".
Character Catchphrase: "My friends call me Charley". Quite a bit of drama is gotten from characters adamantly calling her "Charlotte" regardless, especially the Sixth Doctor.
Characters as Device: Enjoys lampshading her Sidekick status:
C'rizz: Doctor, what's happening?
Eighth Doctor: Hmm?
C'rizz: I said "what's happening?"
Charley: No, not like that. Ahem. "Doctor, what's happening, Doctor?!!"
C'rizz: Oh, that's good.
Charley: Practice, you see.
Commuting on a Bus: Her appearances are much more intermittent after she parts company with Six. The two box sets of her own series were released several years apart, and she has popped up sporadically in occasional stories and Short Trips set during her time with The Doctor since.
Double Consciousness: Develops one after "The Chimes of Midnight", and remembers both dying in the R101 and being rescued by the Doctor.
English Rose: She was raised to become one, but said Screw This, I'm Outta Here as soon as she had the chance to. However, many of her traits fit perfectly the idea of a pretty, classy English girl. She has hard time dealing with the fact she's not going to see her family ever again and she longs to become a mother. She speaks in the classic received pronunciation, she likes Jane Austen and history, and her etiquette lessons come quite handy during her time-travelling adventures. Occasionally referenced:
Keep: There's a tint to your skin.
Charley: [sarcastically] It's called English Rose.
Gorgeous Period Dress: A huge fan of it. Jane Austen is one of her favourite authors, and she's very much in love with the past. She also sees historical adventures as an excuse to put her endless etiquette lessons to good use, which typically makes the Doctor groan.
Ignored Enamored Underling: The Doctor knows full well that Charley's madly in love with him. He ignores it until it's much, much too late, at which point they're stuck in the living hell of "Scherzo". Much later, Charley tells the Sixth Doctor that Eight had been in love with her, too — although he'd never have admitted to being in love, per se.
Lady of Adventure: Will try anything once, and very quickly and eagerly adapts to future culture and technology. Loves wielding giant swords, even if she has zero skill with them. Ran away from home to dress up as a boy, sneaked into an international experimental zeppelin flight, and got to Singapore on time for a romantic rooftop rendezvous.
Law of Inverse Fertility: Played With. She really, really wants to become a mother, but the universe seems to conspire against her in that regard... making her give birth to monsters over and over.
MacGyvering: Comes up occasionally. Her excellent upper-class education gives her a few levels in Science Hero, which she uses whenever it's necessary. In "Solitaire", she's able to fashion a rudimentary electromagnet out of its base components.
Mercy Kill: In one truly heartbreaking scene in "Zagreus", she puts the Doctor out of his misery after he begs her to run him through with her sword.
Rebellious Spirit: As a child, she let Roma sleep in her family's attic. She only got more rebellious as she got older.
Parenthetical Swearing: When the Celestial Toymaker forces Charley to think of a four-letter password - to be fair, she was in the middle of a shrinking death trap.
Celestial Toymaker: Do you know how many four-letter words there are in the English language, Miss Pollard?
Charley: I can think of a few right now.
Ripple-Effect-Proof Memory: Develops this kind of memory after a while.
Screw This, I'm Outta Here: When the Eighth Doctor is relieved about C'rizz' death, Charley realises that life with him is too alien and horrifying for her.
Ship Sinking: After the Divergent Universe arc, the Doctor makes her promise to stop yearning for him.
Smitten Teenage Girl: Falls madly in love with the Eighth Doctor, which is completely Played for Drama. Eight is extremely uncomfortable with it.
Temporal Paradox: Was saved from the crash of the R101 by the Doctor, and went on to travel with him. Time appears to proceed normally, until we find out that the Doctor saving her from certain firey doom caused a ripple in the Web of Time. History wrote that Charley was supposed to go down with the ship, but because of her survival, the ripple lead to all sorts of paradoxes and tons of "things-that-shouldn't-have-happened" to happen throughout the whole of history. All this, plus causing the Web of Time to slowly unravel itself due to her merely existing.
Time Crash: Is a living one, thanks to something going mighty wrong when the Doctor rescued her. Nearly every story in her initial arc involves time itself warping around her and history developing continuity errors. Although there's nothing particularly special about her or her rescue, she accidentally becomes the "patient zero" of a grand scale disaster. The Doctor fixes this in a rather creative way.
Timey-Wimey Ball: Thanks to the fun of time travel in Doctor Who, Charley is one of the very few companions to know the Doctor before he knows her. Sorta. Long story short, she was a companion of the Eighth Doctor, assumed he died in an adventure and wound up later being a companion to the Sixth Doctor. Whose memory of Charley was wiped so the timeline would be preserved when he was the Eighth Doctor. Wibbly wobbly, timey wimey indeed.
Tomboyish Name: Her Christian name is Charlotte, but she goes by Charley.
Torture Porn: With some frequency, and most notably in "The Creed of the Kromon".
Uncanny Family Resemblance: Her sister Cecilia, who appears in Gallifrey, is also played by India Fisher. India's likeness is used for Cecilia on the cover art, although made to look slightly different from Charley.
Unwitting Instigator of Doom: Charley's family did not take her passing well. Years after her death, her family are nearly completely broke, having to sell their previous estate and unable to hold onto more than a single servant. At least part of their ruin was from hiring various mediums to try and contact her spirit, while another significant part was just sheer depression over her being gone. She helps them out of it, but not without cost...
You Are Worth Hell: Charley simply will never abandon the Doctor, no matter how many times he tries to make a Heroic Sacrifice so she can live a normal life. He's very seriously not happy with it.
You Can't Go Home Again: She realized that that she cannot and will not see her family because they naturally assume she's dead. This becomes worse come "The Fall of the House of Pollard"; Charley does get home, and faces some of the fallout with her parents. Then the Viyrans catch up with her, and they erase every memory they have of her, ensuring she can never go back to them.

Hex Schofield

Thomas Hector "Hex" Schofield (Seventh Doctor)

https://static.tvtropes.org/pmwiki/pub/images/hex2_6040.jpg

Debut: "The Harvest" (2004)

Departure Story: "Signs and Wonders" (2014)

Voiced by: Philip Olivier (2004–2012, 2014, 2017-)

"OH MY GOD!"

Hex was introduced as a character well before his first proper appearance, during the Sixth Doctor's encounters with the Forge. He later became a staff nurse and was encountered by the Seventh Doctor and Ace in 2021. Hex is compassionate and good at keeping a cool head, even during his Oh My God freakouts.

Anachronic Order: Several stories set during his travels have been released, despite them being after his departure.
Babies Ever After: Has a couple of children with Sally Morgan, after the two of them finish travelling in the TARDIS.
Badass Normal: Considering the fact that he's just a nurse and is more than often in over his head, Hex does some pretty awesome stuff. Especially taking out two elder Gods in one day, admittedly at the cost of his own life. Not bad for someone without Nitro-9.
Big "OMG!": Not always big, but a bit of a Character Catchphrase. Used to dramatic effect in "The Settling" with Oliver Cromwell.
Break the Cutie: Villains love to torture poor Hex. Especially Nimrod, telling him enough of the truth about how his mother died to make him distrust the Doctor and then tricking him into resurrecting her as a mindless vampire monster. This would have been bad enough had he not just recovered from being shot. He's also been gratuitously tortured in an English Military Hospital, and nearly burned as a witch by Oliver Cromwell. Indeed, the writers at Big Finish would often joke about what crap they could shove on Hex with each new script.
Despair Event Horizon: When he thinks the Doctor and Ace are dead and he's stranded in the Siege of Wexford, he leads the townspeople into battle and becomes a little bit of a Blood Knight.
Did Not Get the Girl: He falls in love with Ace pretty early on. She's not interested (not to mention incapable of having a functional romantic relationship with anyone), and he gets over it eventually when he realises she'd "have [him] for breakfast". They just become close friends instead. Notably not the case when it came to Sally Morgan.
Earn Your Happy Ending: Dear Lord did he. After having been literally turned into a new man by Koloon, who himself didn't exactly lead a happy life, Hex is effectively ressurected from the dead for good, and gets together with Sally Morgan. They hook up and have a couple of kids, satisfied with their lives together.
Heroic BSoD:
- After the events of "The Settling", which Ace considers his very own "Ghost Light".
- After finding out the fate of his mother, not to mention the fact that the Doctor had chosen to lie by omission about her fate for so long.
Heroic Sacrifice: A twofold one for Hex, actually. Hex uses the ultimate power of the universe in a game of proverbial chess with Fenric (yes, THAT Fenric) to take out Fenric's opponent, who wanted to destroy the universe. With the game over, and Fenric still having lost despite his opponent being banished, Fenric takes over Hex out of spite. Hex restrains Fenric (an elder freaking god, mind you) and throws himself out into the Space-Time Vortex to make sure Fenric is dealt with once and for all. While bleeding out from a fatal wound he'd received months ago that Fenric's opponent was holding back so he could use Hex as a pawn against Fenric in the first place. Holy crap.
Hospital Hottie: Actor Philip Olivier is a professional (nude) model.
Nice Job Breaking It, Hero: In "The Settling", he accidentally causes the Siege of Wexford.
Parental Substitute: He's eventually adopted by Evelyn. Who then promptly dies.
Raised by Grandparents: Hex never knew his mom, raised by his grandmother instead - he even thought she was his mom until he was older.
The Reveal: In the middle of the Sixth Doctor story "Thicker Than Water", the Seventh Doctor shows up completely out of nowhere, uncredited and unannounced, to reveal to Evelyn that Hex is Tommie, Cassie's son from the Forge Story Arc.
Ship Tease:
- Plenty of it with Ace. He fancies her quite a bit and would love to have a nice shag or maybe a date, but Ace just sees him as a little brother.
- He gets a few moments of these with Sally Morgan in the few times they're together. It takes.
Taking You with Me
These Hands Have Killed: He does not cope well with being made to fight in a war.
The World Is Just Awesome: Hex is a bit of a sci-fi dork — and in many ways a precursor to Rory Williams — and isn't sure at first whether he's cut out for the reality of space/time adventures. He quickly warms up to it and delights in seeing new things, and Ace (who's much more jaded) loves to watch him enjoy his adventures.

C'rizz

C'rizz (Eighth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/rizz_6727.png

Debut: "The Creed of the Kromon" (2004)

Departure Story: "Absolution" (2007)

Voiced by: Conrad Westmaas (2004–07)

"The dead don't sleep."

Pronounced KER-izz. C'rizz is a chameleonic monk from the Divergent universe who got kidnapped during his wedding, used as a guinea pig, and subsequently broken over and over and over again by everything that crosses his path. He tries to put on a brave face and becomes close friends with Charley. C'rizz never gets much Character Development during his first Story Arc, and as we find out eventually, there's a very good reason for that...

Artificial Human: Well, Eutermesan. And he has no idea.
The Assimilator: As revealed in "Something Inside", he can permanently absorb people's powers by murdering them. He also takes on little bits of the personality of every person he meets, a fact he actively hates.
The Atoner: For killing L'da.
Anti-Hero: Most of the Doctor's companions share at least the basics of their moral code with that of the Doctor. C'rizz... really, really doesn't.
Beware the Nice Ones: C'rizz is kind, helpful, even valiant at times, and will ruthlessly murder you or grant you a Fate Worse than Death if you hurt him.
Blessed with Suck: He strongly dislikes his own powers.
Blue-and-Orange Morality: The way C'rizz sees the world is very alien and intensely frightening at times.
Break the Cutie: Something the Expanded Universe excels at, it seems.
Broken Masquerade: He keeps up the façade for a good long time. Until he can't anymore.
Canon Immigrant: Mentioned in "The Night of the Doctor".
Characters as Device: C'rizz is an experiment in what happens when a companion just doesn't fit in team TARDIS all that well. After his final episode, the Doctor is actually relieved that things can go back to normal again. His response horrifies Charley so much that she breaks off their friendship and leaves Eight forever.
Creepy Good: "Good" being a very relative term, thanks to his Blue-and-Orange Morality.
The Empath: Adapts to whomever he's around. The reason he has no Character Development to speak of at first is because he simply doesn't have much of an identity of his own. Entirely Played for Drama.
Heroic Sacrifice
Humiliation Conga: In "Other Lives", he decides to leave the TARDIS and go look for the Doctor... on 19th century Earth. He's pretty much immediately captured, chained up, forced to rip off his clothes and put on a thong, and displayed as a sideshow freak.
I See Dead People: Originally played straight at the start of "The Last", where C'rizz is but one of a few who see the spirits of the dead surrounding them. Later actually twisted somewhat at the end of "Terror Firma", where it's revealed that C'rizz sees each and every person he's killed, or rather "saved", as a ghost around him.
Lizard Folk: He's a humanoid chameleon with an exoskeleton.
Mercy Kill: Originally played painfully straight in his first story, where C'rizz is forced to kill his loved one to alleviate her suffering and release her from what is essentially an undeath. However, the repeated trauma that C'rizz undergoes eventually leads him to believe that each person that he's killed is also one that he's "saved". This includes a Dalek. His church's credo revolves almost entirely around killing, and he was one of their most adept assassins.
Path of Inspiration: Unbeknownst to him (or to anyone, really), his church was founded by Rassilon.
Power Copying: From the people he "saves".
Power Nullifier: He becomes quite adept at shutting his mind (and others' minds) off from scrying and hallucinations, since he picked up moderate telepathy from someone he murdered.
Punctuation Shaker: Just like his fiancée, L'da.
Psychopomp: What turns out to be the purpose of his existence.
Reality Warper: In "Absolution".
Rebel Prince: His father is the leader of the Foundation. Although it's later revealed that things are a little more complicated.
Sealed Inside a Person-Shaped Can: The people he saves become trapped inside him forever. It's eventually revealed that this is exactly what he was created for.
Telepathy: He picked up a bit of it once from someone he killed.
This Looks Like a Job for Aquaman: In "Memory Lane", the heroes fight a nanotech substance that latches onto people's personalities. C'rizz is able to confuse it into a neutral state by letting it into his mind, since he has no clear-cut personality.
Token Evil Teammate: Sort of. He's certainly this during the Divergent arc, but gradually becomes more like the Doctor and Charley, thanks to his natural ability to copy people's moods and personalities. He still occasionally maims and murders, though, and the Doctor and Charley stay completely unaware of it for a very long time.
Torture Porn: He gets severely physically tortured in "Something Inside", and nearly dies from his internal injuries.
Trauma Conga Line: First, his beloved is horrendously mutated before his eyes, forcing C'rizz to kill her off out of mercy. As he begins to travel to other worlds, though, it seems like each subsequent author and story was continually trying to out-do the previous one.
Weak-Willed: His chameleonic skin isn't the only thing that adapts to his environment. As it turns out, his race also subconsciously adjusts emotionally to people around them.
You Wouldn't Like Me When I'm Angry!: He'll break your spine and rip your eyes out.

Gemma and Samson

Gemma and Samson Griffin (Eighth Doctor)

Debut: "Terror Firma"

Siblings who travelled with the Eighth Doctor for a time, very early on in his life.

Break the Cutie: Continuing a running trend of monstrously awful things happening to Eight's companions (or, depending on how you view it, they're the start). They were captured and experimented on by Davros, with Samson being turned into a Roboman.
Hero of Another Story: Supposedly went on a lot of adventures with the Doctor.
Laser-Guided Amnesia: Just as the Doctor doesn't remember them, they don't remember him. Thanks to what's done to them, Samson doesn't remember he has a sister either.
Mercy Kill: Gemma asks C'rizz to give her one, rather than continue being Davros' control. He obliges.
Parental Substitute: With their dad long dead, they saw the Doctor as a substitute father, though he would've preferred being seen as the cool uncle.
Remember the New Guy?: Played for horror with their introduction, where the Doctor doesn't remember them.
Typhoid Mary: What Davros turns Gemma into, before setting her loose on Earth.

Lucie Miller

Lucie Miller (Eighth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/lucie_8361.jpg

Debut: "Blood of the Daleks, Part 1" (2007)

Departure Story: "Death in Blackpool" (2009)

Voiced by: Sheridan Smith (2007–2011)

"Just look at you. A right frock-coated ponce."

Lucie bleedin' Miller is dumped on the TARDIS by the Time Lords without explanation (at first), and completely fails to be impressed by the alien ponce in front of her. Over the years, she and the Doctor end up becoming best friends.

Anguished Declaration of Love: In a welcome subversion of the trope, her big damn "I love you" to the Doctor is completely non-romantic. Apart from some very mild flirting, they really are just friends.
Big Damn Heroes: Just when it looks like the Daleks are about to win, here comes Lucie with a spaceship and a really handy nuke.
Brutal Honesty: Values it to the point where the Doctor lying to her causes her to break off their friendship.
Canon Immigrant: Mentioned in "The Night of the Doctor".
Character Catchphrase: "What's that when it's at home?", and "Hiya!"
Commuting on a Bus: She was absent for the first half of the fourth season (see Put on a Bus below). Though Sheridan Smith played two androids the Doctor had programmed to have her voice in "Prisoner of the Sun", the January 2011 episode.
Deadpan Snarker: Extra emphasis on "snarker". Describes herself as "Sarcasmo, the Lord of Sarcasm".
Death by Disfigurement
Dying Moment of Awesome: Her Heroic Sacrifice literally saves the world.
Future Me Scares Me: Subverted. It's suggested that Lucie is destined to become a ruthless dictator, but then it turns out it was someone else.
Gratuitous French: She and the Doctor pull this at the beginning of "Scapegoat". Her French is hilariously terrible.
Handicapped Badass: As of "Lucie Miller", she contracted a plague while on holiday with Alex, which left her blind in one eye and dependent on leg braces. In spite of this, she, Alex, and Susan staged several raids on Dalek forces. With nuclear submarines.
He Is Not My Boyfriend: There's a running gag of people assuming the Doctor is her boyfriend, to her annoyance. Unusually for the trope, he really isn't; the two are close friends, but that's it.
Heroic Sacrifice: Taking a doomsday nuke into the heart of a Dalek time engine while shouting out "LUCIE BLEEDIN' MILLER!" so the Daleks knew just who screwed them over. Notably, earlier on, she's a rare case of Heroic Sacrifice survivor. Once things started going to hell, she expected to die on a mission, and didn't particularly care... until she found out Susan's TARDIS key was active, and the Doctor was (finally) coming. But, lest you think Big Finish was only kidding with the title, she ends up dying anyway.
Killed Off for Real
The Lad-ette: Particularly in her first episode.
Lady Swears-a-Lot: And has a lot of fun with it. Freely mixes up "bleedin' hell" with "oh, sugar!".
Noodle Incident: More of a Jelly Incident, in her case.
Lucie: ... It's just I've got a thing about jelly. Incident at a children's party, 1992. Trust me, you don't wanna know.
Not Herself: Is very easily hypnotised and possessed, to her constant frustration. Is also extremely adept at staying conscious during mind control, though, and fighting back from the inside.
Of Corsets Sexy: Subverted in "Scapegoat", in which Lucie, having donned Gorgeous Period Dress for what is meant to be a night at the Moulin Rouge, has this exchange with the Doctor:
Doctor: You look very... uh... very... uh...
Lucie: Say "cheap" and I'll have you.
Oop North: Lucie is from Blackpool.
Punctuated Pounding: On several occasions. In "Orbis", the Doctor has gone amnesiac (again) and forgotten her, so she literally slaps him into remembering her, spelling her name and smacking him after every letter. It works.
Put on a Bus: She voluntarily leaves the Doctor and returns home after an incident that makes her believe she can't trust him anymore. Her aunt Pat, whom she first met in 1974, was killed by shapeshifting aliens on their second visit to her and replaced by another, benevolent shapeshifting alien who had been Pat's husband. The Doctor knew this and opted not to tell Lucie, against his better judgment, and she eventually found out. This broke her trust in him, until she ran into him again on a moonbase on Deimos, where she had been abandoned by the Meddling Monk, with whom she'd been travelling. She then spends Christmas with him, Susan, and Susan's son Alex, though rather than resume travelling with him she opts to explore 22nd-century Earth with Alex. He's somewhat amusingly alarmed by that, telling Alex to look after her in one breath, and warning him not to let her teach him any bad habits in the next. She eventually forgives him for the Aunt Pat things... soon before she dies.
Replacement Goldfish: While separated from Lucie and stuck trying to keep a sun from going supernova, the Doctor creates several successively more complex and lifelike android copies of Lucie to help him, down to her voice and personality. One escapes and goes on a several weeks long journey to find the TARDIS and bring it to the Doctor as part of a plan to help him escape. Another tries to kill him. Repeatedly.
Shell-Shocked Veteran: Spends two years living through the Dalek occupation. The Doctor is horrified when he sees her picking up a gun and threatening to shoot the Monk.
Ship Tease: Has a few moments with the Doctor throughout season 3, and with Alex in season 4.
Sweet Polly Oliver: While undercover in an Irish monastery in "The Book of Kells", she takes on the persona of Brother Lucius.
Vitriolic Best Buds: With the Doctor. For all they snark at one another, they're self-admittedly each other's best friend. She does accuse him of staring at her bum a lot.
Why Did It Have to Be Snakes?: She does not enjoy crocodiles... at all. She also has something against jelly due to an incident from her past, though she doesn't elaborate on it.
You Put the "X" in "XY": In "The Skull of Sobek", she starts seeing strange visions. The Doctor's comment: "You put the Lucie in hallucination."

Oliver Harper

Oliver Harper (First Doctor)

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Debut: "The Perpetual Bond" (2011)

Departure Story: "The First Wave" (2011)

Voiced by: Tom Allen (2011)

A stock broker from London in the 1960s (the same time as Ian and Barbara), Oliver starts his day learning the law is after him and starts making plans to run. Then he comes across the Doctor and Steven Taylor, and gets just the opportunity he is after, while making sure that his secret isn't learned... that he's gay. Oliver stands as the first companion to be created exclusively for the Companion Chronicles, and in-universe chronologically, the first LGBT companion.

Gayngst: He's scared out of his mind at the Doctor and Steven finding out he's gay, as in his time homosexuality was illegal and punishable by death. Of course, neither cares — the Doctor's from another species where gender and sexuality aren't even constructed the same way, and humans from Steven's century haven't cared for a long, long time.
Heroic Sacrifice: Enacts one to ensure the Doctor and Steven aren't killed by the Vardans.
Jumped at the Call: The opportunity to travel in the TARDIS appealed with Oliver's very great desire to escape England. He gets that and more.
Killed Off for Real: Though he does survive as a Virtual Ghost for a good time.
Living on Borrowed Time: He believed he was on this, since he knew at some point Steven and the Doctor would learn about his sexuality. He calms down considerably when they accept him immediately.
Sharp-Dressed Man: Due to leaving with the Doctor and Steven with just the clothes on his back, Steven goes through every adventure in a stock broker suit. He even had spares at his flat to lend to Steven for a time.
Virtual Ghost: Ends up as one due to his Heroic Sacrifice to prevent a Vardan from killing the Doctor and Steven. He ends up caught in the time trail left by the TARDIS, and stays coherent long enough to watch the Doctor regenerate in his TARDIS before properly passing on himself.
We Hardly Knew Ye: He sadly leaves the TARDIS after only three episodes.

Jason

The Marquis Jason de Saint Epiman de Sinee de la Tour (Sixth Doctor)

Voiced by: Noel Sullivan (2008, 2011)

From the Big Finish version of the stage play The Ultimate Adventure and its Companion Chronicle sequel, Beyond the Ultimate Adventure. A teenaged French aristocrat, rescued from the French revolution by the Sixth Doctor. Jason's a cheerful and adventurous young man.

Canon Immigrant: He originated in the stage play.
Overly Long Name: The Marquis de Saint Epiman de Sinee de la Tour.

Crystal

Crystal (Sixth Doctor)

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Voiced by: Claire Huckle (2008, 2011)

From the Big Finish version of the stage play The Ultimate Adventure and its Companion Chronicle sequel, "Beyond The Ultimate Adventure". An up-and-coming nightclub singer who accidentally joins Team TARDIS.

Canon Immigrant: Like Jason, she first appeared in the stage play.
Career Versus Man: She picks Jason over her career, but he'd have just as easily stayed in the 1980s for her if she'd wanted him to.
Official Couple: She and Jason get together halfway through the play.
That Reminds Me of a Song: Terrance Dicks tried very, very hard to fit the sudden singing into an otherwise (sort of) realistic script. In the end, he just gave up and went with this trope.
Tomboyish Name: She goes by "Crys".

Thomas Brewster

Thomas Brewster (Fifth and Sixth Doctors)

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Debut: "The Haunting of Thomas Brewster" (2008)

Departure Story: "A Perfect World" (2008)

Voiced by: John Pickard (2008–2011)

A Dickensian little git who had the misfortune of getting caught up in the Doctor's life at the tender age of four. Orphaned, abandoned and raised in a workhouse, he never had a chance to get a proper education (let alone love and care from anyone), and inevitably got stuck on the path of villainy. The Doctor, feeling at least partially responsible for Brewster's ruined childhood, comes to see him as a companion eventually and tries his best to make adult Brewster's life somewhat normal again.

Artful Dodger: After escaping from his abusive boss, he spends a few years as a teenager living the life of a Dickens-style little thief.
Even Bad Men Love Their Mamas: Well, hypothetical future Stable Time Loop ghosts pretending to be his mama.
Heel–Face Revolving Door: In part due to being somewhat of a Doom Magnet, and in part because being a thief is the only life he knows.
Ignorant of Their Own Ignorance: He failed to convincingly pose as the Doctor because he didn't know about the Daleks.
Last-Name Basis: The only person to regularly call him Thomas is Nyssa, despite him repeatedly insisting she call him Brewster instead.
Love Redeems: He's willing to settle down with Connie and live a normal life. Too bad she gets into a traffic accident soon after.
The Millstone: Nearly all of the problems the Doctor and Nyssa come up against in Brewster's company are a direct result of his lying, his stealing or his selfishness. The Doctor isn't exactly heartbroken when Brewster elects to stay behind with Connie in 2008.
Never My Fault: He makes a grudging apology for stealing the TARDIS and selling off much of the contents within, but he is more annoyed than anything when the Doctor doesn't immediately forgive him and says he had "no choice" but to do what he did.
Nice Job Breaking It, Hero: In as much as Brewster can be a 'hero', he unwittingly made it harder for the Doctor to set up a life in the twenty-first century; "Lost Property" reveals that Brewster had the property at Baker Street converted into flats before he left, preventing the Eighth Doctor from just taking up residence in the building himself when the TARDIS suffers serious damage and he is basically stuck on Earth.
Sequel Hook: Last seen ditching Earth altogether to go set up an interstellar company.
Small Name, Big Ego: He has attempted such scams as claiming that the Doctor gave him the TARDIS to trick old companions or pretending to be the Doctor while trying to act as a gang boss, but he just doesn't have the skill to do it properly.
Strangled by the Red String: He has one cup of coffee with Connie after accidentally landing in 2008 and after he leaves manipulates the Doctor into taking him back to her, deciding to stay with her only a couple of hours later.
Token Evil Teammate: Although he makes a few genuine efforts to better himself. The Doctor's companions and friends are more willing to see Brewster's good side than the Doctor himself — Evelyn genuinely wants to help the boy, and Patricia Menzies just sees him as an Ineffectual Sympathetic Villain and runs circles around him intellectually.

Alex Campbell

Alexander David "Alex" Campbell (Eighth Doctor)

Debut: "An Earthly Child" (2009)

Departure Story: "To the Death" (2011)

Voiced by: Sonny McGann (2009–2011, 2023)

Susan's son and the Doctor's great-grandson. Seems to have taken the whole "Surprise! You're half-alien!" thing quite well after the initial shock, considering Earth was pretty xenophobic while he was growing up. During the Time War, the Doctor takes an alternate version of him on as a companion.

Book Dumb: Alex isn't doing especially well in school. Later subverted by "Relative Dimensions", where it's revealed he wants to become an architect and is doing well in college studying architecture. It also helps that he isn't hanging around crowds who want to up-end the education system by this point in his life.
Half-Human Hybrid: A very rare example of nonhuman Mom, human Dad. Even rarer, Alex isn't genetically half-human and half-Time Lord - the Time Lord part of him only makes up seven percent of genome. As such, he's unable to regenerate, has only one heart and is non-telepathic. The Doctor is equal parts incredulous and disappointed about it despite looking at the test results he just made in "Relative Dimensions".
Heroic Sacrifice: Alex performed one of these, planning for the Daleks to destroy the very important console he was "trying" to sabotage when they shot him to stop him. It worked.
It Runs in the Family: Though it takes some time to develop, Alex has quite the eye for details in his surroundings and a desire to travel.
Tell Me About My Father: Or rather, his great-grandfather, since Alex was old enough to make several memories about his own father.
Why Couldn't You Be Different?: The Doctor is quite disappointed to discover that Alex lacks several Time Lord traits, such as regeneration and telepathy.
Wonder Child: Shades of this. Doctor Who media varies on whether or not Time Lords are interfertile; at the very least, human/Time Lord children are unusual enough that Eight asks Susan exactly how she managed it (she's a bit embarrassed by the question). Subverted in that, while Alex is clearly bright, he's no Time Lord, and is missing a number of abilities they otherwise have from birth.

Dr. Elizabeth Klein

Dr. Elizabeth Klein [Restored Universe] (Seventh Doctor)

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Debut: "UNIT: Dominion" (2012)

Departure Story: "Daleks Among Us" (2013)

Voiced by: Tracey Childs (2012, 2013)

UNIT's scientific advisor, and the regular-universe counterpart of a very nasty alternate-universe Nazi officer. The Seventh Doctor's been keeping an eye on her just to make sure she's nothing like her alternate self, and she's absolutely not happy about it. But while being similar in temperament to her "other" self, this Klein is far more personable than her former incarnation, and most importantly not evil. For tropes pertaining to the alternate Klein, see her entry under Big Finish Doctor Who – Villains.

Badass Normal: Klein really is not fazed by Daleks, Sontarans, or even Nazis.
Cosmic Retcon: The end result of a major cosmic retcon. This is treated like a big secret to be kept from her in "UNIT: Dominion", but Klein adapts rather well.
Dr. Jerk: However, she is trying to improve herself.
I Know You're Watching Me: "The Umbrella Man" (read: The Seventh Doctor) has been stalking her throughout her life at UNIT. It all turns out to be mostly harmless. Mostly.
Jerk with a Heart of Gold: Klein's not the warmest of people, but she does make an effort to socialize with her co-workers and she definitely doesn't enjoy people suffering.
Jumping Off the Slippery Slope: This seemed to happen in "Daleks Among Us", after Klein found out about her birth circumstances.
Science Hero: She's quite the dab hand with a piece of technology, even keeping up with the Doctor's own contraptions and making use of them. She even learns how to pilot the TARDIS simply by watching Seven, in a rather eerie mirror of her alternate self, though she does have room to learn.
Tomato in the Mirror: Discovering about her alternate self was a bit of a shock to say the least. However, given the situation at hand, she moves on admirably from it.

Tamsin Drew

Tamsin Drew (Eighth Doctor)

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Debut: "Situation Vacant" (2010)

Departure Story: "The Resurrection of Mars" (2010)

Voiced by: Niky Wardley (2010–2011)

A failed actress who wants to leave her dreary life on Earth. Travels with the Doctor after Lucie leaves, but never really manages to get along with him. He outright rejects her as a companion when they first meet. Turns out taking her along anyway was a bad idea.

Canon Immigrant: Mentioned in "The Night of the Doctor".
Characters as Device: She's simply not suited for TARDIS travel... at least not with the Doctor. Her story line explored what happens when the wrong companion ends up with the wrong Time Lord, and is completely Played for Drama.
Entertainingly Wrong: Not by any means unintelligent or unkind, but she fell into being the Doctor's companion by circumstance, without her nor the Doctor having really thought the matter through. She had only been traveling with the Doctor for a matter of days before encountering the Monk and, having no experience with him nor any other Time Lord, assumed that all Time Lords were benevolent like the Doctor with only the methods changing, and she found his direct and damn-the-consequences approach more appealing and dismissed the Doctor's objections as overly cautious.
Locked Out of the Loop: Though she never really bothered to investigate either, and she mistook a Dalek invasion fleet for medical volunteers.
My God, What Have I Done?: After being told of the part she played in spreading the Monk's plague across the Earth, she is immediately remorseful and is ready to rejoin the Doctor on an immensely dangerous mission to try and correct it.
Old Maid: As an actress, she's starting to get offered "mom" parts instead of "daughter" parts, and she hates it.
The Power of Acting:
- Invoked, but subverted, when the Doctor asks her to infiltrate into a monastery with some Improv. She's dreadful at it, and ends up posing as Maria von Trapp.
- Averted in her debut episode. As part of her audition for the part of the Doctor's companion, she creates the persona of an ambitious, energetic go-getter with the idea that that's the kind of person the Doctor is looking for. It turns out that the Doctor hates her persona and she's the first to be eliminated from the competition. It's only after the screening is done and she fesses up to how she approached it that the Doctor looks at her genuine self with fresh eyes and agrees to take her on.
Replacement Goldfish: For Lucie. Knows it and hates it.

Mary Godwin

Mary Godwin (Eighth Doctor)

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Debut: "The Company of Friends: Mary's Story" (2009)

Departure Story: "Army of Death" (2011)

Voiced by: Julie Cox (2009–2011)

One of the Eighth Doctor's first companions, long before the regular timeline of the monthlies. Mary Godwin meets the Doctor at Lake Geneva, just before she would go on to write Frankenstein and, soon after, get married and become Mary Shelley. (Although she's already going by her fiancé's name most of the time) She's having difficulties in her relationship with Percy and his friends and jumps at the chance to escape it all for a bit.

All Girls Want Bad Boys: She likes her men urbane yet wild, which is what attracts her to both Percy Shelley and the Doctor.
Anachronic Order: Her adventures with young Eight take place mid-way through his travels with Gemma and Samson Griffin, long before those of Charley Pollard and Lucie Miller. This was done to put a bit of a breather between "To The Death" and "Dark Eyes", and to explore what Eight's life was like before "Storm Warning" (and "Terror Firma"). The older Eighth Doctor, whom she encounters first, is straight from the Time War era.
Anguished Declaration of Love: To Eight, eventually. He just sort of stammers.
Constantly Curious: She is a would-be science fiction writer, after all. And some of the advanced things she sees would be even more outlandish to her than to the average companion.
Crazy-Prepared: She may be naive about the realities of time travel, but she does carry a small knife and a number of other useful things with her.
Cosmic Retcon: It's implied that her adventures with the Eighth Doctor have become this given that she encounters the Thirteenth Doctor in the actual show the same night she should have met the Eighth Doctor while the Thirteenth Doctor doesn't seem to recall their adventures. While cut from the script, the audio Return of the Cybermen gave the explanation that because of the Time War the Doctor's timeline had been rewritten.
Deliberate Values Dissonance: She has a bit of a laudanum habit. The Doctor doesn't exactly approve.
Famed In-Story: The Doctor is especially concerned about not getting her killed, having plucked her out just before fame set in.
Have We Met Yet?: She and the Doctor meet in the wrong order.
Heroic BSoD: On her first trip, wondering what she was thinking coming to a place she didn't belong.
The Maiden Name Debate: Whether or not she's using "Shelley" varies several times per episode, depending on how connected she feels to Percy at the time. Her hesitation in this regard is shown especially once she (inevitably) falls head over heels in love with Eight.
Nightmare Fetishist: Slightly. She's morbidly impressed by some horrifying things.
Silk Hiding Steel: She's very composed.
Speculative Fiction: Considered, in story, as the mother of science fiction.
Sympathy for the Devil: She became friends with a Cyberman. The Doctor later remarks that she tends to "side with the monster." It sets her up for the mindset behind the writing of Frankenstein.
Wise Beyond Their Years: At eighteen, she's already had two kids and outlived one of them. She's take-charge and maternal and slapped a girl (apparently) her age for her childish insolence.

Amy/Abby

Amy/Abby (Fifth Doctor)

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Debut: "The Judgement of Isskar" (2009)

Voiced by: Ciara Janson (2009-2020)

A living Tracer capable of sensing the various segments of the Key to Time, Amy was given human form by the Grace and tasked with assembling the decaying Key to prevent the destruction of the universe, along with her "sister" Zara. Amy's first decision upon being given life is to recruit the Fifth Doctor to help her in her mission, and she becomes his companion for the "Key 2 Time" trilogy. Originally naive and emotionless, she becomes progressively more human and compassionate across the three stories, largely due to the Doctor's influence. Once their mission is complete, Amy and Zara are freed from the influence of the Grace and allowed to keep living their lives on their own terms, and they lead their own spinoff series, Graceless, which features more adult themes than regular Doctor Who. During this series, Amy changes her name to Abby and strives to always be a good person and do the right thing despite her tendency to be an accidental Walking Disaster Area.

Aborted Arc: At the conclusion of the "Key 2 Time" trilogy, Romana takes Amy back to Gallifrey to enrol in the Time Lord Academy. By the time the first series of Graceless begins, she has abandoned her Time Lord training to rejoin Zara.
Addictive Magic: The first time she accesses the power of the Key to Time, she notes with concern how good it feels to use it and feels compelled to keep using it, which is what happened to Zara.
Bizarre Alien Senses: Her nose tickles whenever she senses a segment of the Key to Time.
Brought Down to Normal: For a while, she and Zara lose all their powers and grow old together in a seaside village. It doesn't last.
Cain and Abel: She is the clear Abel to Zara's Cain throughout most of the "Key 2 Time" trilogy, but she and Zara switch between the two roles quite a lot during Graceless, with Zara sometimes being the one trying to talk Abby out of drastic actions that would result in a lot of death and disaster.
Feel No Pain: Part of her powerset gives her total immunity to pain. When she is tortured by a particularly vicious alien, she tries to be helpful by offering up "oooh, ahh, that... really hurts" to be polite.
Mama Bear: Though she isn't Joy's true mother, only her aunt, Abby is still fiercely protective of her.
Moral Event Horizon: In the first series of Graceless, Abby starts down a dark path when she begins regularly abusing her powers to control minds in the Sphere, and goes through one of these when she makes the deliberate decision to destroy the Sphere and all life on board when she and Zara make their escape.
More than Mind Control: Abby learns to use her powers to get into people's heads and convince them to do anything she wants. She really goes to town with it in "The Sphere", manipulating everyone in the hotel casinos to win all their money for herself and Zara.
Nice Job Breaking It, Hero: A recurring theme in her spinoff is that no matter how hard she and Zara try to do good or save people, most of the time they end up making things worse. By the time she meets the Fifth Doctor again in Wicked Sisters, she has lived for many centuries and accidentally become so renowned as a force of destruction that the Gallifreyan High Council recruits the Doctor to stop her and her sister for good.
One-Steve Limit: In the first series of Graceless' she permanently changes her name to Abby. In-universe this is because she no longer feels like the same person she was when she travelled with the Doctor. In real life this was done to avoid confusion with the Eleventh Doctor's companion Amy Pond, who had been introduced on television in the interim.
Really 700 Years Old: The four series of Graceless span many centuries, and Abby spends most of that time looking like the same young woman as when she was first created. Given that she first met the Fifth Doctor when she was "born" and he was travelling with Peri towards the end of his life, he is taken aback during their reunion to learn that she is now significantly older than him when, from his perspective, he only travelled with her a few months previously at most.
Really Was Born Yesterday: The first time she meets the Doctor is at the moment of her creation.
Sarcasm-Blind: Due to being only a few minutes old when she meets the Doctor, she has zero understanding of sarcasm, but she quickly learns under his "tutelage".
Set Right What Once Went Wrong: Uniquely among time travellers in the Whoniverse, Abby and Zara have the power to travel back along their own personal timelines without running into their past selves, and because they both have a tendency to make bad situations worse wherever they go, they end up doing this a lot.
Vocal Evolution: During her first travels with the Doctor, her voice was high-pitched, breathy and earnest, reflecting her childlike nature. As she matures in her spinoff series, her voice gradually lowers and mellows out.

Flip Jackson

Philippa "Flip" Jackson (Sixth Doctor)

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Debut: "The Crimes of Thomas Brewster" (2011)

Joins TARDIS Crew: "The Curse of Davros" (2012)

Voiced by: Lisa Greenwood (2011–present)

Flip is a supermarket checkout girl, a "late teens, fluffy handbag, Essex girl" hungry for a more exciting life. She's definitely not the sharpest tool in the shed, but incredibly brave and adventurous, and willing to throw herself into any kind of danger just to help people. First meets the Sixth Doctor during a misadventure with Thomas Brewster (see above) and eventually becomes his companion.

Book Dumb: She failed her driver's test, doesn't know the first thing about history, doesn't speak a word of French, and gets a little bit annoyed at Six's vocabulary.
Chronic Hero Syndrome: She doesn't get scared easily, and even when she does, she still jumps in with both feet.
Foil: To Thomas Brewster.Nicholas Briggs has said in behind the scenes interviews that the production team had believed that Brewster had been unpopular as a companion because he was of a lower social class than the other characters, but once they realised that people actually disliked Brewster because he treated the Doctor so terribly, they set out to rectify this mistake with a working class female companion who got along with the Doctor very well indeed.
Jumped at the Call: Very enthusiastically.
Nice Girl: She may be a little snarky, but she's tremendously sweet.
Pop-Cultured Badass:
Flip: Well, um, I know that at Waterloo... Napoleon did surrender.
Napoleon: And who told you that, may I ask?
Flip: ... ABBA?
Plucky Girl: Flip gets kidnapped, mind controlled, turned into a living mud creature and, in only her second adventure, is even briefly killed, but she always bounces right back to her usual perky self.
Put on a Bus: At the end of "Scavenger", partially out of feeling like she's holding the Doctor back.
- The Bus Came Back: Returns for more adventures at the end of "Quicksilver".
  - Temporarily 'on the bus' again in "The End in the Beginning" when the Sixth Doctor segment begins with her in a coma while the Doctor and Constance deal with a threat to the colony where she's being treated.
Reckless Sidekick: Her tendency to rush into situations where she knows full well she could get hurt or even killed seriously worries the Doctor and he pleads with her several times to be more cautious. It doesn't really take.
The Un-Favourite: Both her parents have a clear preference for her younger brother, Phillip.
Why Couldn't You Be Different?: In "Scavenger", Flip mentioned her parents wanted a boy for a child, and constantly questioned why she wasn't born one. She left when her brother came around, and her parents didn't seem to notice she'd gone. Worse? Her brother's name is Phillip.

Raine Creevy

Raine Creevy (Seventh Doctor)

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Debut: "The Lost Stories: Thin Ice" (2011)

Voiced by: Beth Chalmers (2011, 2012)

Raine was created for Season 27 of Doctor Who before the series' cancellation (consequently, we don't know what actor would have played her). She's a young burglar from a lower-class family who, armed with an affected posh accent and a healthy dose of sarcasm, decides to see what time and space are all about.

Action Girl: She can wield a fencing foil, sword and axe proficiently, and she takes stressful situations in stride.
Break the Cutie: A minor, self-inflicted version; at the end of Animal in 2001, Raine uses a search engine to look up her family. She finds her father is dead by that point in time, and... well, she doesn't take it well. She takes some time off time travel to adjust to it.
Classy Cat-Burglar: With an expertise in safecracking.
Commuting on a Bus: She's a rare part-time companion, and drifts in and out of the Doctor's life when she feels like it. In real life, this has turned into rather a Long Bus Trip; Raine hasn't appeared in any stories since 2012 (despite her actress still regularly working for Big Finish in other roles) and is rarely even referred to. When Klein asks after her in Persuasion, the Doctor simply says that she is "elsewhere", leaving her fate ambiguous.
Cultured Badass: Though her father was working class, Raine went to a finishing school that groomed her into a more high-class status. She strides in both classes, however.
Fire-Forged Friends: At first, Raine looks down on Ace for being rather rough and uncultured and initially believes that Ace lacks intelligence, while Ace thinks that Raine is a stuck up snob who overestimates her abilities. After Raine proves her safecracking prowess and Ace saves her life from an alien attack, however, they get on much better; it's even Ace who first suggests that Raine join the TARDIS, which the Doctor agrees with.
Force and Finesse: She and Ace form this dynamic; Raine prefers to pick locks and sneak into enemy territory, whereas Ace is much more likely to simply blast her way inside. This leads to some initial tension, but they do have a mutual respect for their respective abilities.
Little Miss Snarker: Especially towards UNIT.
Rapid Aging: Before she was even born; Raine was barely a bump on her mother in "Thin Ice", at least until her mum was compelled to put on an Ice Warrior helmet that partially, physically transformed her into one of their ancient leaders. This shift affected Raine as well, though fortunately it only accelerated her birth without giving her any Ice Warrior traits, and she came out healthy.
Recast as a Regular: Beth Chalmers appeared in dozens of Big Finish dramas in minor roles before (and since) being cast as a companion.invoked
Uncanny Family Resemblance: She looks a lot like her mum, and Beth Chalmers voices both characters.

Lysandra Aristedes

Lysandra Aristedes (Seventh Doctor)

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Debut: "Project: Destiny" (2010)

Joins TARDIS Crew: "Black and White" (2012)

Departure Story: "Afterlife" (2013)

Voiced by: Maggie O'Neill (2010, 2012)

Sergeant of the Forge from 2020s. She was recruited by the Doctor to the Black TARDIS to battle the Elder Gods.

A Day in the Limelight: In Companion Chronicles' "Project: Nirvana".
Captain Smooth and Sergeant Rough: With Nimrod. Inverted with Sally Morgan.
Chess Motifs: Weyland's bishop.
Defector from Decadence: Well, the Forge was hardly decadent, but she defected none the less.
Have We Met Yet?: Meets Doctor out-of-order in his dealings with the Forge.
Mistaken for Gods: By Beowulf and his ilk.
Put on a Bus: She left to help in Africa, after leaving the Doctor's company, wanting to do some good.

Sally Morgan

Sally Morgan (Seventh Doctor)

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Debut: "House of Blue Fire" (2011)

Departure Story: "Signs and Wonders" (2014)

Voiced by: Amy Pemberton (2011–2014)

A soldier from 2020s, Sally met the Doctor during a scientific study to remove fear from the human mind. When she proved loyal, smart and knowing when to obey and disobey orders, she was offered an opportunity to go AWOL. She joined the Black TARDIS team along with Lysandra.

A Dayinthe Limelight: In Companion Chronicles' "Project: Nirvana".
Badass Normal: Even when she first met the Doctor, she proved to be more than capable of handling herself against abnormal threats and forces. It's why the Doctor asked her to travel with him, after all.
Babies Ever After: Has a couple of children with Hex, after the two of them finish travelling in the TARDIS.
Cosmic Plaything: Her parents were killed and her entire life manipulated by Weyland, as part of his chess game.
Hair of Gold, Heart of Gold
Innocent Blue Eyes
In-Series Nickname: Ace had a few choice names for her, including Sergeant Barbie and Private Benjamin.
Last Girl Wins: With Hex.
Raised by Grandparents: Due to her parents passing when she was young, Sally was raised by her grandfather from childhood. He passed on while she was in active duty, however.
Why Did It Have to Be Snakes??: Her athazagoraphobia was often exploted by various psychic beings.

Dr. Liv Chenka

Dr. Liv Chenka (Seventh, Eighth and Ninth Doctors)

https://static.tvtropes.org/pmwiki/pub/images/liv.jpg

Debut: "Robophobia" (2011)

Joins TARDIS Crew: "Dark Eyes 2: Time's Horizon" (2014)

Departure Story: "Stranded 4: Best Year Ever” (2022) ^note

Voiced by: Nicola Walker (2011, 2014–present)

A medtech from the year 2865, who first meets the Seventh Doctor a few months after the Kaldor sandminer incident and, one Dalek war later, ends up as a companion to the Eighth. Liv is deeply snarky, Genre Savvy and proves to be enough of a stable influence to cope with and support the Eighth Doctor throughout both his darker moments and his Cloud Cuckoolander tendencies. Conceived only as a one-shot character for "Robophobia", Liv proved popular enough with both the producers and the audience that she was retained as a companion for nearly all of the Eighth Doctor's box set stories, and in 2019 began starring in her own spinoff, The Robots, covering the year she spent on her home planet of Kaldor during the Time Skip in "Ravenous 2".

Ascended Extra: Though she wasn't exactly a background character, Liv was originally just a secondary character in a Seventh Doctor audio story, "Robophobia". Come Dark Eyes , she's a main character and companion.
Breakout Character: As stated above, Liv's initial one-shot appearance led to her returning as a companion and staying on with the Doctor for the rest of the Dark Eyes series, leading into Doom Coalition, Ravenous and Stranded, while also becoming the star character of her own spinoff series The Robots. As of late 2022, she has been the Eighth Doctor's companion for nearly a decade's worth of stories in real world years.
Broken Bird: The war with the Dalek Empire leaves her so broken, she ends up fleeing to the literal end of the universe — something she's got in common with Eight at that point.
The Bus Came Back: One that happened to be the belly of a starship, with some very nasty radiation exposure, all to escape the Daleks. Fortunately, it ends up with her in the Doctor's TARDIS.
Daddy's Girl: Liv was very close to her father, and heartbroken by his death.
Damsel out of Distress: Like many a companion, Liv has a tendency of getting captured. She also has a tendency for giving as good as she gets, when it's expedient. She even manages to take the Master hostage with only a perfume bottle!
Deadpan Snarker: Liv's default method of communication. At times, her conversations with Eight descend into Snark-to-Snark Combat, which leaves people who don't know them confused as to whether they actually like each other.
Determinator: Refuses to give up in difficult situations, even when there are very few options left. Best seen in Doom Coaliton 4, where she tells the Doctor and Helen that even being trapped in an escape pod post the destruction of the universe won't stop her trying to make things better.
Fish out of Temporal Water: Liv takes a while to really get the knack of being a time traveller, especially when in a timezone sufficiently different from her own. By the end of Dark Eyes 4, however, she's gotten a fairly firm grip on things, and rapidly become an Unfazed Everyman.
Gay Best Friend: Bas. Though Liv herself isn't straight either.
Good Is Not Soft: Liv is perfectly affable towards most people, but also willing to pull a gun on her enemies when necessary.
Grand Theft Me: She's not the only one in her body when Eight meets her.
Healing Factor: During "Day of The Master", thanks to the Eleven reversing the Crucible of Souls, Liv is suffused with regeneration energy, letting her heal lethal wounds without changing her body. By the end of the story, it wears off. Some of it sticks around though - in Stranded 1, when she's shot, Doctors in 2020 London are confused by how quickly she heals. That may also be a result of the intervening centuries of human development.
Hidden Supplies: By "Companion Piece" in Ravenous 3, she's started carrying around a tool set at all times, just in case.
Hotblooded: Has a trace of this alongside her Determinator qualities - when she gets worked up about things she has a tendency to rant loudly, and she throws herself into dangerous situations headfirst on a regular basis.
Human Popsicle: Her body gets frozen during her long voyage on the Sleeper Starship, and her mind is stored on a microchip.
I Did What I Had to Do: Becomes a willing "traitor" for the Daleks when the Dalek Empire shows up to colonise the planet she's on, just so she can continue to do her job as a doctor.
Intra-Franchise Crossover: Spends a single adventure as a companion of the Ninth Doctor. Generally, since attaining the license to new series material, Big Finish hasn't been shy about inserting villains and characters from the new series into their old series lines, but one of a very few times when an old series companion joins with a new series Doctor. Notably, this is the Ninth Doctor in his pre-Rose days, so he comes across as cordial but standoffish and definitely rubs Liv the wrong way compared to her experiences with Seven and Eight.
I Will Only Slow You Down: A non-lethal variety. Liv has been through tough scrapes, and when a situation calls for the Doctor to leave her behind to escape she can and will push him to do so, if only so that he can get the resources required to rescue her properly. It's saved both their lives, ironically enough.
Insistent Terminology: She's a Med Tech, not a Doctor, and she's constantly correcting people.
Letting Her Hair Down: At the start of Dark Eyes 4, she has a day out with a man and gets a chance to be normal. Though she has trouble relaxing, she rather enjoys it and is disappointed when it has to end early.
My Future Self and Me: “Flatpack” sees Liv meet a version of herself who has been trapped in the temporally/dimensionally transcendental Flatpack store for years; while the Doctor and Tania succumbed to the drugs used to keep people in the store, the future Liv sustained herself on food customers had on them when they entered the store until she could find her past self and break the cycle.
Non-Heteronormative Society: Comes from one of these, and doesn't understand why Tania's worried about coming out as trans to her in Stranded 1.
Oblivious to Love: A recurring theme. Liv had no idea that Martin was in love with her in Dark Eyes 4 though, to be fair to her, from her perspective they'd only just met, whereas he'd been going on their first date for at least several months. For bonus points, Martin is played by Nicola Walker's real-life husband, Barnaby Kay. In Stranded 1, she is again initially completely oblivious to Tania flirting with her, and doesn't realise until she actually asks her out.
Only Sane Woman: Liv ends up as this in “Flatpack” as the Doctor and Tania have ingested the drugs that compel them to want to browse through the shop; Liv escapes this as she didn’t order anything at the shop café.
Powered Armour: Suits up in Doom Coalition 2 to fight the Eleven and enjoys it very much.
Science Hero: Part and parcel with being from an age of spaceships and androids. She actually has trouble adjusting to doing things such as making tea manually.
Shut Up, Hannibal!: At separate points in Ravenous 4 she holds both the Eleven and the War Master at gunpoint. She receives speeches from both of them about how she doesn't have it in her to pull the trigger. While it works for the Eleven, the Master is very surprised when she shoots him anyway (albeit non-lethally).
Single Woman Seeks Good Man: Liv doesn't have much luck with men and they don't tend to stick around for long - though not through their own choosing - and she describes herself to her sister as still being a romantic, even after these experiences. She's had more luck (so far) when dating Tania, a woman, in Stranded 1.
Space Clothes: She follows the eccentric Kaldor fashion and makeup trends before getting caught up in the Dalek war. She slowly adjusts to more practical garb after she joins the Doctor, going hand-in-hand with her Character Development. By the time she returns to Kaldor in The Robots, her sister tells her she sticks out in her hometown for walking around everywhere wearing hoodies.
Sugar-and-Ice Personality: Liv has elements of this. She's incredibly sarcastic and her medical work required to develop a hard outer shell, but once she warms up to someone she's kind and supportive. Over time travelling with the Doctor, she begins to lose the 'ice' side.
Survivor Guilt: Surviving, and escaping, the Daleks left her with quite a bit of it, enough so that she went on an expedition to literally the edge of the universe.
The Masquerade Will Kill Your Dating Life: This comes into play in her relationship with Tania in Stranded. After Stranded 1, Liv is free to tell her girlfriend the truth about her travels with the Doctor, but Tania still can't tell her about Torchwood or her own work. It puts a strain on their relationship.
True Companions: Liv considers Eight and Helen to be family by Ravenous 2.
Unfazed Everyman: The sheer amount of adventures she's been on after years with the Doctor and her own independent escapades in space travel and Kaldor resistance fighter have given her a remarkably high threshold for amazement or surprise. Her reaction to her and Helen being captured by the Nine is one of disgusted annoyance.
Virtual Ghost: In an especially bizarre example of the trope, someone else's Virtual Ghost gets copied onto her memory chip, allowing that person to occasionally wake up her body from cryosleep and sabotage the ship without her realising it.
What the Hell, Hero?: She gives several of these to the Doctor. She gives one to the Doctor in Dark Eyes 4 for leaving behind all the collateral damage in order to find his stolen TARDIS. They both give good arguments for their respective cases. She also doesn't appreciate the times he's made deals with the Daleks, whether or not he has any choice in the matter. She gives another one in Doom Coalition 4 when he tries to convince her to accept their fate and live with the guilt of accidentally causing the deaths of everyone in the universe. That time, he acknowledges that she's right to fight on. Finally, she issues him with one in Ravenous 2, when he can't decide whether to trust Helen or not. Liv points out that their friend attempted to sacrifice herself to save the universe, and he takes her point.
Your Days Are Numbered: Due to having run away from the Dalek Empire under very unhealthy conditions. The Master reveals in Dark Eyes 3 that exposure to his strands of retrogenitor particles have cured her of the affliction, however.

Hannah Bartholemew

Hannah Bartholemew (Fifth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/hannah_3.jpg

Debut: "Moonflesh" (2014)

Departure Story: "Masquerade" (2014)

Played By: Francesca Hunt

An adventuress from the early 20th century who has an interest in the occult, Hannah meets the Doctor and Nyssa at a private hunt in Suffolk before an alien sentience starts possessing people and animals. Unlike most of the few Big Finish original companions in that she travels with the Fifth Doctor while he had one of his TV companions, this time with Nyssa.

Action Girl: She is very far from being shy with her shotgun, and is eager to join the fray to assist those she likes. She was also quite at home in a death-trap of a tombship, even if she was out of her league when it came to the technology.
Big Damn Heroes: In "Tomb Ship"; despite the Doctor's squeamishness regarding guns and killing, her shotgun proves quite useful in dealing with the homicidal and virtually mindless aliens attempting to tear them limb from limb in an already deadly ship, and she turns up out of nowhere to save the others with some well-timed shots.
Butch Lesbian: Sort of; her masculine habits, combined with the Word of Gay below, plausibly make her this.
Death of Personality: In a heroic sacrifice to prevent a group of aliens from infiltrating the minds of a shady research facility, Hannah collapses an artificial reality upon herself, the scientists and the infiltrating aliens, removing her emotional mind and exuberance. Only her philosophy of the Order of the Crescent remains, aside from her memories. Unusually for this trope, Hannah recognizes she's unfit for travel in the TARDIS and requests to be left behind, where she may provide some good.
I Will Only Slow You Down: When Hannah's emotional side is removed in "Masquerade", she insists that the Doctor and Nyssa leave her behind, turning down every offer for help in favour of providing assistance where she is.
Jumped at the Call: Hannah is fascinated and excited at the concept of the TARDIS, isn't at all perturbed when she accidentally stowed away on it, and is outright disappointed when told that the Doctor was going to take her back to her own time, though she doesn't make a fuss. She perks up when she learns of the TARDIS's tendency of going anywhere but where the Doctor sets her to though.
One of the Boys: Hannah dresses like a man, eagerly takes part in traditionally "manly" pursuits, such as hunting and drinking strong liquor, and takes offence at being brushed off as one of the "ladies". She also has a hard time sticking with formalities, preferring to just be called Hannah (though she does insist on "ms" over "miss" if it comes to that). Humorously averted in "Masquerade", when she takes on the mindset of an Edwardian governess for a time.
Reincarnation: She effectively believes in this as a member of the Order of the Crescent Moon, where those departed become shadows that guide those "in the light", until they too come back to life and hope to be guided in turn by those in the shadows. She's apparently believed this for most of her life too.
Screw This, I'm Out of Here!: When the carriage she's leading is being attacked by a possessed elephant, she has the sense to jump ship while she can, even if it means leaving behind a disabled man who'd bought her reluctant help with the promise of a thousand pounds. She's not happy about it though, no matter how unpleasant he was.
We Hardly Knew Ye: Only appeared in two and a half stories ("Moonflesh" and "Masquerade" throughout and the last half of "Tomb Ship") before definitively leaving the TARDIS.
Word of Gay: invoked More implied, but the special features of "Moonflesh" point out that during the turn of the century in Boston, a lesbian movement took to being refereed to as "ms" rather than "miss". This particular habit being something Hannah insists on, the production team ran under the train of thought that Hannah had just come back from Boston during that particular period under that "particular persuasion".

Molly O'Sullivan

Mary "Molly" O'Sullivan, later Mary Carter (Eighth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/molly_7785.png

Debut: "Dark Eyes: The Great War" (2012)

Departure Story: "Dark Eyes 4: Eye of Darkness" (2015)

Voiced by: Ruth Bradley (2012–2014); Sorcha Cusack (2015)

"Somewhere, behind the German lines, there were German girls, like me, looking at the terrible things our boys at done to their boys. Was I right? Eh? Was I right?"

An Irish medical volunteer, working in France during World War I. She encounters the Doctor when he's rather suddenly found dying on the battlefield, and is quickly roped up in a full-scale Dalek invasion.

Badass Normal: Just a normal human, yet she tries to smack an Eldritch Abomination with a rolling pin, and walks into an impending explosion, knowing that it was the only way to safely defeat the Dalek Time Controller. She dies smiling.
Berserk Button: Being called "Dark Eyes", especially once she figures out that it's more than just a nickname.
Boisterous Bruiser: She punches Eight in the face.
Bound and Gagged: In "The White Room".
Brainwashed and Crazy: Spends most of "Dark Eyes 3" drugged to the gills and mind controlled.
Broken Bird: Though healing well by 1918.
Buffy Speak: A very rare example of The Stoic being fond of Buffy Speak, since she defaults to it even in stressful situations.
Canon Immigrant: Mentioned in "The Night of the Doctor".
Demoted to Extra: In "Dark Eyes 3", due to scheduling conflicts Ruth Bradley had from a movie deal. She eventually appears played by another actress in "Dark Eyes 4", explained in-story as Molly being now in her sixties.
Eye Tropes: She's got the titular dark eyes: perfectly black irises. She hates that they keep coming back.
Face Death with Dignity: Knowing that the Dalek Time Controller was tied to her own life, Molly calmly walks into an explosion, ending her life on her own terms. She dies smiling, even when she's pulled out of the rubble.
Fish out of Temporal Water: She adapts quickly, but she much prefers her own time.
Heroic Sacrifice: Attempts one in "Dark Eyes", but the Doctor ensures it doesn't go through. Pulls off a rather more successful one at the end of "Dark Eyes 4", to ensure the Dalek Time Controller ends with her. Even when Liv and the Doctor pull her out of the rubble, she's still smiling.
Hiding in Plain Sight: Manages to escape Dalek notice by simply changing her name and staying out of trouble.
Hospital Hottie: Though absolutely not in the mood to be one at first. She's fully aware that her being a sexy Hospital Hottie would only make things worse for the wounded soldiers, who have enough on their minds already. Also, at the start of her story she's full of nits anyway, and hasn't had a change of clothes (or a bath) in two weeks. Near the end of the war, she continues working as a nurse in London, and She Cleans Up Nicely.
Insistent Terminology: "Tardy box".
Letting Her Hair Down: When the war ends, she decides to treat herself to a vacation as the Doctor's companion, and mellows out a bit.
Living MacGuffin: Throughout "Dark Eyes" and its sequels, Molly is sought out for some nefarious scheme or another. She adjusts to it fairly well by the third time.
Malaproper: She consistently refers to any TARDIS she comes across as a "Tardy Box", with few exceptions. Though it was initially a mocking name, it slowly became something of an affectionate nickname. The Doctor's TARDIS didn't appreciate it much. She mostly drops it after forty years.
Meaningful Name: When she starts mocking the Doctor's name, he informs her that her own name means "small fish dark-eyed". The nickname "Dark Eyes" sticks, although she's not too happy with it.
My Country, Right or Wrong: Averted. She's horrified when she finds out that a man she's being treating is a member of the IRA ever since the failed Easter Rising.
Put on a Bus: Because of the retro-genitor particles still inside her, Narvin takes her back to her own time to keep her safe from harm.
Replacement Goldfish: Like Tamsin, she's a Replacement Goldfish for Lucie Miller. And like Tamsin, she's nowhere near willing to deal with Eight's emotional problems. However, things mellow out between them.
Ripple-Effect-Proof Memory: Ends up with one.
Shell-Shocked Veteran: Has deliberately stopped making friends to avoid getting even more emotionally damaged.
The Slow Path: Several times — the final time the Doctor meets her, she's in her 60s, and has spent forty years living in an alternate timeline under Dalek occupation.
Spell My Name with a "The": She doesn't have time to put up with the Doctor, and she mocks him by addressing him as "The Doctor". This habit slowly drops the closer she comes to him, although she never truly stops the name.
The Stoic: Doesn't ever let her emotions get out of hand.
Sugar-and-Ice Personality: She's extremely harsh and self-reliant, and has taught herself to ignore her emotions; but she's definitely The Heart, and the reason she continues fighting is to save people no matter the cost.
Survivor Guilt: Ohh boy. Once Eight realises she has just as much Survivor Guilt as he does, they start to bond over it a little.
We ARE Struggling Together: In spite of the constant danger the TARDIS brings her, this is what helps Molly adjust and warm up to the Doctor.

Hector Thomas

Hector Thomas (Seventh Doctor)

https://static.tvtropes.org/pmwiki/pub/images/hector_and_the_doctor.jpg

Debut: "Afterlife" (2013)

Departure Story: "Signs and Wonders" (2014)

Voiced by: Philip Olivier (2013–2014)

"You must really, really want to meet me. Grab yourself a glass of vino. There’s a bottle open on the side."

On New Year's Eve in the 2020s, Hector Thomas found himself in a parking lot. Out of jail and wanting to make a name for himself, he began an empire of restaurants, clubs and other businesses. Trouble was, he began to run into the Finnegans, a three-family group who were not only buying out other clubs, but had an odd tendency of not dying out...

Darker and Grittier: Compared to Hex - whereas Hex would back away from any kind of killing, Hector has had many a Finnegan cut down, and it's implied he was fairly aggressive in getting to where he was. Both Hex and Hector have had a thing for Ace at the start too. However, while Hex came down gradually from his crush, Hector... pushed the line a bit in his first outing. (Ace was clearly grieving for a lost friend whom Hector reminded her of, but Hector was fairly quick to invite her to his flat and do a bit of kissing. Fortunately, the mood changes and things don't progress any further into Squick territory.)
- However, this turns out to be part of the persona inserted into Hex's head when Koloon brought him back to life. He lightens up considerably the further along he comes past what was to be his expiration date.
The Don: The crimes Hector and his men commit onscreen are least stealing high-tech and foreign weaponry, property damage, and many murders of the Finnegans. The same Finnegans, in fact, to the point he's getting creative with how they're killed and where they're dumped. It was also mentioned that the first club he came to own had an owner that suddenly went missing, although it's ambiguous if it was his or Koloon's work.
A God Am I: Though he initially takes up the guise of Dionysos for a benign purpose in "The Mask of Tragedy", utilizing an alien psychic mask, the damaged mask gives him this impression of himself. It goes badly for him.
Heel–Face Turn: In a sense. In his first story, Hector starts thinking of ending conflicts with the Finnegans and just settling with being a business owner. His time on the TARDIS shows that, while he is still a bit gritty, he genuinely wants to do good and finds the constant death around him abhorrent, far from the gangster he was before. Even he recognizes the changes he's going through come "Signs and Wonders".
Identical Stranger: He looks and sounds exactly like Hex, save a slightly different accent. Their personalities are completely different however. That's because he is Hex, but with a personality built from a life in a book.
I Just Want to Be Normal: The memories of his old life fading away, and Ace's constant attempts to jog his memory, make him want to just settle down and make new memories he knows are his own. He gets his wish, and then some.
Loss of Identity: Happens to Hex when Lily Finnegan smashes the bottle holding his memories and self, leaving him as Hector from then on. The Doctor doesn't take it kindly. Ace tries to get around that, though Hector doesn't appreciate it.
- Hector himself goes through this the longer he lives, his old memories becoming indistinct and difficult to tell if real or not to him.
Mind Rape: Is the unfortunate and constant subject of this, helped in no part from having a great hunk of his past removed from his mind. From being possessed by the Swarm, being torn into by digital prawns, to being given delusions of grandeur by a mind-affecting mask, Hector's mind comes under a lot of abuse.
Split-Personality Merge: With Hex, courtesy of Ginny Greenteeth. Hex comes out as the dominant part of the personalities, effectively reviving him from the dead.
That Man Is Dead: Though he recognizes he won't be able to measure up to Hex in Ace's eyes and that Hex was a good man, Hector is quite fine with being the man he is. However, he doesn't appreciate being constantly compared to Hex in a negative light, nor attempts to jog Hex's memories in his head.
Unfazed Everyman: It takes a lot to faze Hector after he starts travelling in the TARDIS.
- Send Me Back: That said, he doesn't really adapt to adventures in the TARDIS very well.
What the Hell, Hero?: Has this reaction towards Ace and Seven every so often when confronted with the death and manipulation that follows them around. It simply rubs him the wrong way at how aloof they seem to treat their adventures.
Your Days Are Numbered: He originally supposed to live for a single year, from New Year's to New Year's. However, nobody could have foreseen that Ace would give Hector a trip in the TARDIS....

Constance Clarke

Constance Clarke (Sixth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/const10.jpg

Debut: "The Last Adventure" (release order); "Criss-Cross" (chronological)

Voiced by: Miranda Raison (2015–)

Member of Women's Royal Naval Service from World War II.

Action Girl: The Doctor notes that she "tends to save people", something that served her well in the wartime.
Alliterative Name: Constance Clarke.
Berserk Button: When she finally meets Henry and learns about his new life, she is so outraged that she began verbally attacking the woman Henry was with before being informed that Flip was actually a friend of the Doctor's who'd only just met Henry Clarke.
Braids of Action: Goes from 1940s hair to one long braid, as evidenced by the covers.
Chekhov M.I.A.: Constance constantly worries about her husband, a spy in deep cover behind enemy lines. After a particularly long absence of messages from him, she starts asking everyone who may know something about whether he is dead or not. Nobody gives her a straight answer on the subject. When it turns out that her husband has been sending her messages, ones that her superiors have been denying her, Constance decides to leave with the Doctor.
Clone Angst: She dies choking on the fumes from a fire during the events of "Static" but the Doctor manipulates events so that she's plucked out of time in the moment before her death and her consciousness transferred into a clone before sending her original body back into the fire to die along with the Eldritch Abomination trapped inside it. While she acknoweldges that she is still herself, the notion that she's no longer in her original body prompts her to put off her initial plans to leave so that she can spend more time adjusting to her new state.
Mama Bear: Though not a mother, Constance is very protective of the Wrens under her guidance, and does not enjoy seeing them mistreated.
Science Hero: A more moderate one, but she's fairly familiar with a number of complicated scientific concepts as part of her work in World War II, including parallel realities.
Unfazed Everyman: Constance is a very difficult woman to shake, even when presented with places and concepts that are well away from what she would have experienced in the 1940s. Even when she is shaken, though, she recovers quickly.

Dr. Helen Sinclair

Helen Sinclair (Eighth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/helen_doom_coalition_2.jpg

Debut: "Doom Coalition 1: The Red Lady" (2015)

Voiced by: Hattie Morahan (2015–)

A classical linguist from 1963. Meets the Doctor, accidentally gets blamed for the biggest museum heist in modern times in the process, and runs away with him.

Abusive Parents: Helen's father constantly disparaged her and her achievements, and when she finds out he's died believing she ruined the family name, she can't bring herself to feel sad about it.
Beware the Nice Ones: She's very polite, kind and well mannered, but she's also willing to scream at her boss for slighting her and fly a TARDIS into the Resonance Engine to save the universe.
Character Development: In "Doom Coalition" Liv repeatedly has to tell the Doctor not to be rude to Helen. By "Stranded", Helen is confident enough to call the Doctor out on his inappropriate behaviour without Liv having to intervene.
Dance-Off: Liv and Helen have at least one in the TARDIS's games arcade between adventures.
Deliberate Values Dissonance: The amount of discrimination she faces as a gay scholar in the 60s has left her frustrated with the world, and she's very glad to discover that her new friends in the TARDIS aren't as close-minded.
Fangirl: Helen is a huge fan of the Grimm brothers, and audibly extremely excited to meet them in "Ravenous 3".
Hair of Gold, Heart of Gold: She has blonde hair in the boxset covers, and is an extremely kind and considerate person.
Heroic Sacrifice: Helen attempts this at the end of "Doom Coalition 4" by flying herself into the crucible of souls, managing to both save the universe and miraculously survive. She later tries it again in "Ravenous 2" by spending a lifetime learning to fly the TARDIS before dying of old age, this time being saved by Liv using a wish to bring her friend back.
I Have No Son!: Helen's father disowned her brother Albie for being gay at some point before 1963, and it's implied that she never came out to her family for fear he would do the same to her.
Internal Homage: Helen is based on Who producer Verity Lambert.
I Want My Beloved to Be Happy: Helen's attitude to Liv and Tania's relationship. Though it's unclear whether Helen would have actively pursued a *romantic* relationship with Liv, she does say that she's her closest friend in the universe and it's heavily implied that, had she not been raised in a deeply homophobic environment, she would have done.
Lady And A Scholar: Kind, polite, socially adept, and in love with her work.
Like Brother and Sister: This is her relationship with the Eighth Doctor — they consider each other family by the end of "Ravenous 4".
Morality Pet: Briefly serves as this for the Eleven when they're both trapped in a prison, Helen hoping that the Eleven can be a good man when he has no opportunities to conquer. It actually works to a degree, as the Eleven notes at one point that only three of his personalities still want her dead even after he reverts to type.
My God, What Have I Done?: Has this when she tries to visit her family in the 1990s and learns what her disappearance did to their lives. Namely, the Sinclair family name was dragged through the mud in high society when news got out that Helen supposedly stole and/or destroyed several priceless antiques and vanished without a trace. Her brother who had a fiance at the time had the engagement broken off due to the scandal. Her father stewed in bitterness and took it out on his doormat wife for decades until their own deaths. Her brother, the sole surviving member of the family believed that Helen had left them all holding the bag until her long-lost daughter (Helen herself in an alias) made contact with him out of the blue. To make matters worse, she makes her visits against the Doctor's advice and comes to find out that the mere act of doing so creates a Stable Time Loop that locks the changes to her timeline into place, ensuring she will go down as the mastermind of one of the most notorious museum heists in history.
Rage Breaking Point: Her introduction in "Doom Coalition 1" has her shouting at the man who's denied her a promotion for being a woman, describing the discrimination which has brought her to this point.
Stay in the Kitchen: What she deals with in her museum before meeting the Doctor. Despite her qualifications, she is passed up for promotion in favour of a younger, less experienced male colleague. When she brings this up with her mentor, he not-so subtly tries to sway her to look at getting married and starting a family. After all she's in her mid 20s; practically an old maid.
You Can't Go Home Again: She tries, and ends up ruining what was left of her chances.

Ann Kelso

Ann Kelso (Fourth Doctor)

Debut: "The Syndicate Masterplan: The Sinestran Kill" (2019)

Voiced by: Jane Slavin (2019-)

The first original Big Finish companion for the Fourth Doctor, Ann is a WPC in 1970s London who meets the Doctor whilst he is investigating an alien assassination attempt. This Character is a Walking Spoiler, so edit carefully. Ann is in fact a cover identity for Space Security Services agent Anya Kingdom, for tropes relating to Anya, see the following folder.

Action Girl: A former police officer.
The Bus Came Back: In Dalek Universe Two,The Lost, an alien entity, imitates Ann to taunt the Tenth Doctor about her "death."
Death of Personality: Anya's remanifestation effectively kills Ann's personality, and there is no way of getting Ann back.
Flat Character: As a way of playing on the way the Doctor has companions, Ann is fairly basic, with a few hidden depths but not many. but of course, this in a way was foreshadowing for Anya's reveal. It makes sense for Ann to be a sort of basic personality.
Good Cop: Amiable and well meaning.
Loss of Identity: Ann Kelso is actually a cover identity for Space Security Services agent Anya Kingdom, and once Anya's identity is restored Ann is effectively dead.
Manchurian Agent: While travelling with the Doctor, Ann will occasionally revert to Anya Kingdom's identity to deal with things in a more permanent manner than the Doctor would approve of.
- Applies on more than the obvious level, as even Anya Kingdom has been 'programmed' to think of the Doctor as an enemy.
That Man Is Dead: While Anya still retains Ann's memories, the Doctor and K9 each consider Ann to be gone after they learn the truth about Anya.
Recast as a Regular: Jane Slavin had appeared in many minor roles in other Big Finish audios, particularly in Tom Baker stories.^note Their acting chemistry partially led to the creation of Ann.
Unfazed Everyman: When Ann learns of the existence of aliens, her priority is still protecting a witness even though she's protecting him from aliens from the future (Subverted as Ann was specifically programmed to go with the Doctor).
Walking Spoiler: You can probably tell by all these examples, huh. Ann's character is completely overshadowed by her twist.

Fourth Doctor Adventures/Dalek Universe Spoiler Character

Anya Kingdom (Tenth Doctor)

https://static.tvtropes.org/pmwiki/pub/images/anya_4.jpg

Voiced by: Jane Slavin (2019-)

Debut: "The Syndicate Masterplan: The Perfect Prisoners" (2019)

Joins TARDIS Crew: "Dalek Universe One: Buying Time" (2021)

Secret Agent Anya Kingdom returns in Dalek Universe, investigating a downed spaceship crash, and encounters the Doctor once more, wearing a new face.

Walking Spoiler: She's the biggest twist in the Fourth Doctor Adventures, but that doesn't stop her from showing up in Dalek Universe without any warning.
The Ace: On par with android Mark Seven, Anya possesses incredible strength and athleticism, even taking on invisible monsters with a laser gun. Her reputation reflects this, as she's so good, not even her leader for the mission is allowed to know who she is.
Manchurian Agent: While obviously having done this as Ann, Anya manages to do this yet again, because her boss while investigating the spaceship is unaware of her true rank.
Wolf in Sheep's Clothing: The Tenth Doctor says that while he trusts military leader Esther not to kidnap him, he doesn't think it would be above Anya. She doesn't deny it.
Took a Level in Badass: While Ann was a proficient police officer, she wasn't at a "fighting invisible monsters with a gun that shouldn't work against them and winning" level.

Marc

Marc (Fifth Doctor)

Debut: "Tartarus" (2019)

Voiced by: George Watkins (2019)

A Roman slave from the year 63 BC in the service of Cicero, Marc is freed by his master after his adventure with the Doctor, Nyssa and Tegan and becomes their companion.

The Ace: Despite his relatively lowly status as a slave, Marc is incredibly athletic, intelligent and intuitive, easily outpacing his companions in the Warzone obstacle course and proving himself a skilled enough navigator in Tartarus to help track down three keys. He has also secretly taught himself to read and write, something forbidden to slaves in his time.
Broken Ace: After his quest for fame and glory in "Warzone" directly leads to his almost being killed and then partially converted into a Cyberman, he is left traumatized and bitter.
Cyborg: After managing to fight off the Cybermen's mental conditioning in "Conversion", he is left with the physical upgrades they provided to him.
Distressed Dude: Spends almost the entirety of "Conversion" Strapped to an Operating Table until his friends can rescue him.
Fish out of Temporal Water: Even more so than most companions, since Marc is from far enough in the past that electricity has not been invented yet, not to speak of things like female emancipation. He is awed by things we consider commonplace, like sliding doors, and he is mystified by words like "energy".
Glory Hound: In "Warzone", Marc sees the titular obstacle course as his opportunity to become as celebrated as the gladiators of his home time, and throws himself into it with gusto. It does not end well.
Happiness in Slavery: Though Marc had wondered what life might be like if he were not a slave, the fact that Cicero is a kind and generous master means that Marc's life is not a miserable one, and he was fairly content with his station in life. When Cicero frees him and gives his blessing for him to travel with The Doctor, Marc is genuinely sad to leave his old life behind.
Odd Friendship: With Tegan, who is outspoken, combative and independent, the exact opposite of the ladies Marc is used to in Rome. She puts up with precisely none of his humble deference, and eventually he starts snarking right back at her and they get along much better.
Only Known by Their Nickname: His full name is Marcipor, but that is never used again after his debut story.
Prefers Rocks to Pillows: As a slave from an ancient society, Marc takes some time to adjust to future concepts, and the plush, modern beds of the TARDIS are a bit much for him. He sleeps on the floor in his TARDIS bedroom, claiming it's the only way he can actually get any sleep.
Replacement Goldfish: Even though he's really nothing like Adric, the fact that Marc is young and naive as well as the Doctor's first male companion since Thomas Brewster does bring out the Doctor's nurturing, teacherly side. Whenever Marc is in danger, the Doctor frequently overreacts out of fear that he will lose another companion the way he lost Adric.
Spear Counterpart: In a lot of ways, Marc is a male version of Katarina, both of them being downtrodden servants of ancient Earth societies who end up travelling with the Doctor. Where Katarina was permanently frightened and out of her depth, however, Marc proves himself adept and capable enough of adjusting to the unfamiliar worlds he finds himself in.

Hebe Harrison

Hebe Harrison (Sixth Doctor)

Debut: "Water Worlds" (2022)

Voiced by: Ruth Madeley (2022)

A marine biologist, Hebe has used a wheelchair since birth due to an unspecified problem with her legs. A former student of Doctor Evelyn Smythe, she was left with an emergency signal device to use to call for help. She eventually used this during strange events on an oil rig she was investigating, eventually accepting the Doctor as a "substitute" for Evelyn.

Commonality Connection: The Doctor already thought highly of Hebe, but learning that she's a former student of Evelyn's helps them both bond over missing her.
Don't You Dare Pity Me!: Hebe has a habit of being hostile as she prefers to get in other people's faces rather than allow them to feel sorry for her, but accepts that any help offered by the Doctor and Mel is just because they want to be her friends rather than them being condescending towards her.
Handicapped Badass: Hebe relies on a wheelchair to get around and can only walk with a stick for short periods, but she refuses to let this hinder her.
Ignore the Disability: To a point; Hebe doesn't like being treated as incapable because of her condition, but she's not so obsessive about it that she'd be offended if someone made a comment that didn't take it into account. For example, when Mel told her to run from apparent danger and later apologised for her choice of words, Hebe clarified that she was only offended at the suggestion that she should be afraid and accepts that in a dangerous situation Mel can't be expected to remember a more politically correct term.
Keeping the Handicap: Suggested; the Doctor initially assumes that she wants to travel with him to find a world where her condition could be treated, but Hebe swiftly corrects him that she just wants to see some of the water worlds she's overheard him describe.
Mistaken for Aliens: When the Doctor and Mel first hear Hebe's motorised chair approaching, they mistake it for a Dalek.
Not So Stoic: Despite her personal strength, Hebe is clearly shaken when Patricia MacBride is revealed to have prejudices against disabled people, MacBride considering them "wrong" and needing to be "fixed" rather than accepting people as they were.
O.O.C. Is Serious Business: When Hebe first sees the TARDIS interior after learning what the ship is capable of, she makes it clear to the Doctor that what she's about to ask is very difficult for a person who swore they'd never ask someone else for any help greater than passing the salt.
Ret-Gone: "Chronomancer" ends with Hebe being erased from history by the manipulations of Patricia McBride, now calling herself "Purity" using stolen time-travel technology; a timeline featuring Hebe's existence is eventually restored.
Ripple-Effect-Proof Memory: In "Girl in a Bubble", after Patricia McBride creates an alternate timeline where Hebe has been told to live in isolation because the world is "too dangerous", contact with the TARDIS soon restores Hebe's memory of her life in the original reality.

Valarie Lockwood

Valarie Lockwood (Eleventh Doctor)

Debut: The Inheritance (2022)

Voiced by: Safiyya Ingar (2022—2024)

A cyberneticist from the 54th century who joins the Doctor in his search for Clara Oswald.

Cyborg: All of Valarie's limbs are cybernetic, giving her Super-Strength.
Deadpan Snarker: In spades.
You Are Better Than You Think You Are: When the Doctor tells Valarie how he supposedly ended the Time War, she doesn't judge him for it and assures the Doctor that he's still a good person by pointing out his Chronic Hero Syndrome.

Lady Audacity Montague

Audacity Montague

Debut: The Devouring (2023)

Voiced by: Jaye Griffiths (2023-)

A few other characters have been introduced who, while not technically companions, meet the Doctor on occasion:

Patricia Menzies

DI Patricia Menzies

https://static.tvtropes.org/pmwiki/pub/images/menzies_6121.png

Voiced by: Anna Hope (2008–2011, 2019)

A Mancunian detective-inspector who keeps encountering the Sixth Doctor.

Have We Met Yet?: She and Six meet in the wrong order- Patricia first meets the Doctor in "The Condemned" as he starts travelling with Charley and the Doctor first meets her in "The Crimes of Thomas Brewster" while he's travelling with Evelyn- and realizing the implications for the Web of Time, they both decide to keep it a secret from each other.
Bavarian Fire Drill: She spends a large chunk of one adventure pretending to be the Doctor's next regeneration.
Great Detective: She's really very good at her job.
Oop North: From Manchester.
Nerves of Steel: She pretty much treats the Doctor's adventures as just another day at work.
Reasonable Authority Figure: She's very willing to listen to the Doctor's story, once she figures out that he's telling the truth.
Unfazed Everyman: She grasps the basics of time and space travel very quickly, and doesn't let it keep her from getting the job done. She even starts policing the aliens among us because she knows they can't go knocking on the door of regular authorities. Pro bono.

Winston Churchill

Voiced by: Ian Mc Neice (2016-present)

Baker Street tenants

After the events of Ravenous the TARDIS crew find themselves stranded on contemporary Earth where the Doctor finds himself the unwitting landlord of 107 Baker Street. (Which has been broken into flats without his knowledge.)

Tania Bell

Voiced by: Rebeca Root (2020-present)

Aisha Akhtar

Voiced by: Amina Zia (2020-present)

Zakia Akhtar

Voiced by: Avita Jay (2020-present)

Ron Winters

Voiced by: David-Shaw Parker (2020-present)

Tony Clare

Voiced by: Jeremy Clyde (2020-present)

Robin-Bright Thompson

Voiced by: Joel James Davidson (2020-present)

Ken-Bright Thompson

Voiced by: Alan Cox (2020-present)

Sargeant Andy Davidson

Voiced by: Tom Price (2020-present)

See here for tropes regarding his parent show.

Characters / Big Finish Doctor Who – Companions

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Susan Campbell (First and Eighth Doctors)

Ian Chesterton (First Doctor)

Vicki Pallister (First Doctor)

Steven Taylor (First Doctor)

Katarina (First Doctor)

Sara Kingdom (First Doctor, Fifth Doctor)

Dorothea "Dodo" Chaplet (First Doctor)

Jamie McCrimmon (Second Doctor)

Zoe Heriot (Second Doctor)

Dr. Elizabeth "Liz" Shaw (Third Doctor)

Josephine "Jo" Jones née Grant (Third and Eleventh Doctors)

Captain Mike Yates (Third Doctor)

Tropes associated with Big Finish

Doctor Who

Gallifrey

The War Doctor

Lungbarrow

Doctor of War

George Litefoot & Henry Jago (Fourth and Sixth Doctors)

Adric (Fourth and Fifth Doctors)

Nyssa of Traken (Fifth Doctor)

Tegan Jovanka (Fifth Doctor)

Vislor Turlough (Fifth Doctor)

Kamelion (Fifth Doctor)

Perpugilliam "Peri" Brown (Fifth and Sixth Doctors)

Melanie "Mel" Jane Bush (Sixth and Seventh Doctors)

Dorothy "Ace" Gale McShane (Seventh Doctor)

Cass Fermazzi

Rose Tyler (Tenth Doctor)

Kazran Sardick (Eleventh Doctor)

Dr. Evelyn Smythe, later Evelyn Rossiter (Sixth and Seventh Doctors)

Princess Erimemushinteperem (Fifth Doctor)

Charlotte "Charley" Elspeth Pollard (Eighth Doctor and Sixth Doctor)

Thomas Hector "Hex" Schofield (Seventh Doctor)

C'rizz (Eighth Doctor)

Gemma and Samson Griffin (Eighth Doctor)

Lucie Miller (Eighth Doctor)

Oliver Harper (First Doctor)

The Marquis Jason de Saint Epiman de Sinee de la Tour (Sixth Doctor)

Crystal (Sixth Doctor)

Thomas Brewster (Fifth and Sixth Doctors)

Alexander David "Alex" Campbell (Eighth Doctor)

Dr. Elizabeth Klein [Restored Universe] (Seventh Doctor)

Tamsin Drew (Eighth Doctor)

Mary Godwin (Eighth Doctor)

Amy/Abby (Fifth Doctor)

Philippa "Flip" Jackson (Sixth Doctor)

Raine Creevy (Seventh Doctor)

Lysandra Aristedes (Seventh Doctor)

Sally Morgan (Seventh Doctor)

Dr. Liv Chenka (Seventh, Eighth and Ninth Doctors)

Hannah Bartholemew (Fifth Doctor)

Mary "Molly" O'Sullivan, later Mary Carter (Eighth Doctor)

Hector Thomas (Seventh Doctor)

Constance Clarke (Sixth Doctor)

Helen Sinclair (Eighth Doctor)

Ann Kelso (Fourth Doctor)

Anya Kingdom (Tenth Doctor)

Marc (Fifth Doctor)

Hebe Harrison (Sixth Doctor)

Valarie Lockwood (Eleventh Doctor)

Audacity Montague

DI Patricia Menzies

Winston Churchill

Tania Bell

Aisha Akhtar

Zakia Akhtar

Ron Winters

Tony Clare

Robin-Bright Thompson

Ken-Bright Thompson

Sargeant Andy Davidson

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