The prideful, articulate naysayer with a hidden heart of gold. The Sixth Doctor was a darker (and certainly more unstable) Doctor, more suited for a hard and chaotic universe, whose default emotions were righteous indignation or smug self-satisfaction. Wore a multicoloured coat and wasn't averse to fisticuffs or murder to get out of a desperate fix.
Despite his thunderous exterior and tendency towards Dirty Business, he still remained firmly dedicated to the pursuit of justice, and was always capable of being deadly serious or emphatic to others' plight when the situation called for it, and when the chips were down, he always remained unwavering and uncompromising when confronting the local forces of evil or the morally misguided, unafraid to give them a sharp and passionate "The Reason You Suck" Speech or Kirk Summation, no matter how great a threat they posed to him.
Alas, viewers weren't exactly fond of the idea of a periodically-evil Doctor. During his first season, the show got in trouble for being too violent. Baker became the only actor to be fired from the role, thanks to Executive Meddling; the fallout was so acrimonious that he didn't reprise the role for a regeneration, so they Dropped a Bridge on Him. However, Colin Baker is actually a wonderful guy, and is currently still redeeming the character fantastically in Big Finish Doctor Who, to the point of being voted "favourite audio Doctor" by the fans and eventually doing his Doctor justice with a proper regeneration story in 2015.
Tropes associated with the television series
- '80s Hair: A mess of big blond curls. Stories which feature Colin Baker as Six when he has gotten older see him with less hair coverage until finally balding and having very short and neat white hair around the lower perimeter of his head.
- Aborted Arc: A multi-year arc was planned in which the Sixth Doctor would mellow out, but politics at the BBC intervened. This was later taken up (after a fashion) by the Big Finish audios, where regular companion Dr. Evelyn Smythe puts up with exactly zero of his ego-trips and gives him a much-needed reality check, leading to quite a bit of Character Development. Unfortunately, in the TV series, the dissatisfaction with Baker's tenure bled into the material itself ("The Trial of a Time Lord") and later Who novels, which had Seven seeing him as a fundamentally flawed incarnation (though he eventually changed his mind).
- Animal Motifs: He wears cat badges or brooches. Baker related the character to a quote from Rudyard Kipling:"I am the Cat who walks by himself, and all places are alike to me".
- Anti-Hero Substitute: Whereas the Fifth Doctor found himself stuck in a World Half Empty, fretting about other ways, Six seems more open to employing dirty methods when fighting evil. In truth, the Sixth Doctor usually wasn't very violent but the situations he found himself in certainly were. Though Nathan-Turner's iron fist was keenly felt in the Costuming Department, script editor Eric Saward was, for all intents and purposes, in charge of the show during this period. Saward is also well-known for his affinity for action heroes, morally ambiguous stories and a kill-or-be-killed mentality. He was at sea with Davison's Doctor, but Baker allowed Saward to indulge a less-utopian worldview. "Feels different this time", indeed.
- Big Fun: The most portly Doctor thus far, especially in Season 23, though that isn't saying much.
- Bond One-Liner: Fond of them. There's a particularly grim one in "Vengeance on Varos," and it began to attract executive mumblings about whether Doctor Who was going too far. After two guards accidentally fall into an acid bath that was meant for the Doctor...Sixth Doctor: (looks at the doomed guards with an "oh, dear" expression) Forgive me if I don't join you.
- Came Back Wrong: Probably the most memorable regeneration trauma to date. Six has a peculiar fascination with peoples' throats in his debut story.
- Can't Argue with Elves: The Sixth Doctor isn't quite this bad, but he is abrasive and easily the most articulate Doctor. Do not argue with him. You will lose.
- To take it a step further, in the audio range, where he runs into versions of himself sometimes, if he starts arguing with himself, nobody wins.
- Catchphrase: "Mmm, I wonder... Aha!"
- Character Development: The Sixth Doctor's relationship with his companion Peri changes for the better with each adventure they have together. If the Sixth Doctor's run had not been abruptly cut short, then he would have also been shown mellowing down and becoming a calmer Doctor closer to his previous incarnation. Big Finish and other parts of the Expanded Universe would eventually get around to explore this idea in detail.
- Character Tics: Grasping his coat lapels in manner not so dissimilar to One's.
- Cheshire Cat Grin: He does one in his opening credits.
- Combat Pragmatist: Extremely so. When faced with a multitude of buttons, a gun and a few seconds to spare, his default solution is to shoot the entire control panel and short-circuit the system.
- Contrasting Sequel Main Character: His outspoken, harsh demeanor and not shying away from using physical force when push comes to shove makes him one to Five.
- Deadpan Snarker: Just about every word out of his mouth is a barb directed at someone or something.
- Death by Falling Over/Dropped a Bridge on Him: Hits his head on the TARDIS console. (Although later stories include a bit of Fix Fic for the scene. The BBC Past Doctor Adventures novel Spiral Scratch depicts giant alien parasites sucking away the energy around him that time travel generates. They feast on it until he withers, and the Rani's attack delivers the final blow to an already dying Doctor. This was before the definitive final Sixth Doctor story was revealed in 2015. Big Finish Doctor Who provides another take on the regeneration in The Last Adventure, involving the Valeyard and six different companions.)
- Defector from Decadence: His experiences in this incarnation kill any shred of respect he still had for Time Lord society. After this, he only misses Gallifrey once there's no going back."In all my traveling throughout the universe I have battled against evil, against power-mad conspirators. I should have stayed here. The oldest civilization: decadent, degenerate, and rotten to the core! Ha! Power-mad conspirators, Daleks, Sontarans, Cybermen, they're still in the nursery compared to us. Ten million years of absolute power: that's what it takes to be really corrupt!"
- Doctor Jerk: Took great pleasure in exchanging barbs with Peri, though she took a while to really catch on.
- Interestingly, the first of his Doctor Who Magazine comics was developed before his first episodes even aired, so the writers had nothing yet to go on... and wrote him with a kind, fairly normal personality. It somehow stuck, and his comics incarnation is really just a nice chap, with only the occasional flash of hostility.
- Famous Last Words: As "Terror of the Vervoids" takes place after "The Ultimate Foe", the last thing Six chronologically said (or rather, sang) on-screen would be "Vesti la giubba e la faccia infarina.", (Roughly "Put on your costume, powder your face.")
- A Fool for a Client: Six acts as his own attorney during his murder trial on Gallifrey. This goes down about as well as you'd expect.
- Future Me Scares Me: The Valeyard. He is utterly appalled that someone so decadent could be none other than himself gallivanting around in chaos. But that doesn't stop him from whipping up glorious helpings of grammarian snark toward the Valeyard, calling him everything from "Boneyard", "Backyard", and "Barnyard", to, best of all, "Knacker's Yard".
- Good Is Not Nice: He's very crotchety and self-absorbed, but firmly on the side of good.
- Grumpy Old Man: The actor may not visually fit the role, but the Sixth Doctor himself easily fits the role in personality.
- Hot-Blooded: Colin Baker summed it up as: "He's intolerant about injustice; he's passionate about justice. But he's not a human being. Therefore he may behave, at times, in a way that we mere humans might find puzzling. But the greater good is always at the heart."
- Hurricane of Euphemisms: Especially when frustrated or angry.
- Hypocritical Humor: This Doctor is much more of a "do as I say, not as I do" sort of fellow."This is a situation that requires tact and finesse. Fortunately, I am blessed with both!"
- Iconic Item: That technicolor nightmare coat, the cat badge and the umbrella. Sure enough, his regeneration into Seven inevitably culminates with the new incarnation questioning the former's bizarre tastes and pitching the coat for something more sophisticated. Granted, Six did switch to a blue ensemble for a while, but then an alternate Mel convinced him to revert back because she liked the old outfit better and nostalgia got the better of him.
- I Hate Past Me: The Sixth Doctor considers himself the absolute pinnacle of Time Lord regeneration. As such he has a low regard for his predecessors, most notably Two and Five. Two returned the sentiment.
- Impossibly Tacky Clothes: It's like a clown vomited in his closet. The shirt and suspenders were inherited from Five, the hair and the Hawaiian vest seem to be directly lifted from producer John Nathan-Turner, and Six goes for broke with the coat-shaped quilt, a white dress shirt with question marks on the lapels and checked red sleeve cuffs, a polka-dotted aquamarine or red cravat / mustard yellow with a purple starfield cravat tied in a droopy bow, various clashing vests (asymmetrical rainbow patterns with bars on one side and zigzags on the other, red and white plaid with teddy bear buttons, a pattern of diagonal spangling stripes of violet, blue, cerulean, and green) with strange coloured fobs pinned on, the lemonade pants, scarlet socks, the green loafers adorned with traffic cone orange spats, and a variety of cat badges. As a inside joke on the Doctor's post-regeneration makeovers, it's brilliant parody. (It becomes less funny when the Doctor continues to wear it.)
- And then there's the equally eye-popping but less hard◊ on the eyes outfit Colin wore during his stage play tours, with a unique candy-striped vest, a ruffled undershirt with even bigger question marks on the collar lapels, and a velvet aqua-coloured cravat.
- Colin Baker actually wanted to dress in black velvet for the part (to quote, "a bit austere, ruffled sleeves, long black coat, black trousers"), which John Nathan-Turner shot down immediately due to it basically being the Master's outfit. Legend has it that JNT then turned down the first several versions of the design because they still retained some vestiges of good taste. Interestingly, the costume looks just fine when you remove the excess color (see the outfit Six switches to for a while in Big Finish).
- Incoming Ham: Introduces himself to the world with some good old-fashioned snark!Peri: ...Doctor?
Sixth Doctor: You were expecting someone else?
- Insufferable Genius: Oh, boy. Described by many as a "raging egotist"... but he really was as good as he described himself, like when he temporarily fixed the TARDIS's chameleon circuit in "Attack of the Cybermen". (Well, he got it to change, at least, though it was about as inconspicuous as he was.)
- Jerkass: When it comes to being obnoxious, he most certainly appropriates the gateau. Good examples are him repeatedly calling Peri fat for no apparent reason. Even Mr. Jobel in "Revelation of the Daleks" notices it would take "a mountain to crush an ego like yours". This is really only applicable to his stories in Seasons 21 & 22 - he's a lot nicer in Season 23, which leads to...
- Jerk with a Heart of Gold: The genuine heart of gold still existed in this Doctor, it was just buried under a whole lot of ego. And bluster. But mostly ego. Ironically, the Sixth Doctor may well have had the largest heart of gold of any of them, hidden way deep down underneath the ego. Colin Baker later said he based his Doctor on Mr. Darcy.
- Kangaroo Court: "The Trial of a Time Lord" saw him put on trial for conduct unbecoming a Time Lord by a Gallifreyan court, with the charge later changed to genocide of a minor plant race. Six wasn't allowed to glimpse the evidence against him, the Master was called as a character witness, and most of the surveillance footage was fabricated anyway.
- Kindhearted Cat Lover: He wore a different cat badge on his costume in each story arc. Baker subsequently received a lot more cat badges from fans in the mail. When he played the Doctor on stage in 1989 these gifts gave him the opportunity to wear a different badge in every single performance.
- Knight Errant: Self-described in "The Twin Dilemma":Sixth Doctor: I'm a knight errant, not an errant fool!
- Large Ham: Definitely the most theatrical and bombastic of all the Doctors.
- Laughing Mad: His regeneration trauma ran the gamut of emotions, from "happy drunk" to "raving paranoia" and everything in between. The wardrobe change was interrupted by a bout of existential angst."Nothing but the... urk!... grinding engines of the universe! The... crushing boredom of eternity! HAAAAAHahahahAHAhahahaA!"
- Mood-Swinger: For all his egoism and posturing the Doctor always stands up for what is right. The extremes of his personality means that Six can be murderous one moment and almost tender the next.
- Murder Tropes: Although previous incarnations had no problem with letting villains die horrible deaths or blowing up inhabited enemy shapeships, Six straight up grabbed someone (who very definitely did not have Joker Immunity) and murdered him using a cyanide rag. Admittedly, this was a violent knife-wielding alien who had stabbed the Doctor in the leg and was chasing him with the intention of killing him.
- Nerves of Steel: Showed courage even in the worst situations.
- No Indoor Voice: Six was quite shouty.
- #1 Dime: He's apparently fond of cats, as evidenced by a brooch worn on his lapel (a Colin Baker embellishment, natch). Six was known to tap or stroke the cat before attempting something risky.
- Regeneration By Falling Over: The Rani shot at his TARDIS with a disco laser, there was something involving a rainbow, and... then he was dead on the floor. From 1987 to 2015, that was the impression left when his Doctor was written out of the show before that scene was finally explained. Would you believe it took upwards of thirty years for the true cause of his death to be revealed?
- The Resolution Will Not Be Televised: Colin Baker's dismissal from the TV series led to no true regeneration story. By the time Colin finally got one, he couldn't appear in a filmed episode because he had aged out of the role. In lieu of a TV story, he performed an audio anthology that elaborates on his Doctor's final adventure, and due to the Anachronic Order of these audio productions, it's not the absolute last audio Colin signed on for.
- Rogues Gallery: Mestor, Cybermen, the Cyber-Controller, Sil the Mentor, the Master, the Rani, Chessene of the Franzine Grig, Sontarans, the Borad, Davros, Daleks, the Valeyard, and Vervoids.
- Sesquipedalian Loquaciousness: Depending on the writer, the Sixth Doctor tends to go from "being smart" to "sounding like he not only swallowed a thesaurus, but all of the grammar teachers in England." This is also played up in some of his Expanded Universe appearances.
- Took a Level in Kindness: He did mellow out towards the end of his run. This is most prevalent in the Big Finish Audios.
- Tsundere: The harsh version.
- Vitriolic Best Buds: His relationship with Peri at first; it does take them a few episodes to get along without unleashing a hurricane of insults on each other.
- What the Hell, Hero?: Only used against the Sixth Doctor in terms of his attitude rather than his actions or history.
- Xanatos Speed Chess Player: Once Six actually figures out what the hell is going on, his quick thinking and planning is pretty much this in curly blond hair and a multicoloured coat. That does, of course, depend on the Sixth Doctor actually being involved enough in the main story to realize what's going on — one example left him clueless until the final 20 minutes of the story.
Tropes associated with Doctor Who MagazineThe Sixth Doctor's first comic stories were written before his first televised episode, and with no characterisation to go on, the writers interpreted him as a much kinder incarnation than the Jerk with a Heart of Gold we all know and love from the TV show. It stuck, and his adventures with Frobisher and Peri show him as a kind, determined intergalactic hero.
- Alice Allusion: He features as the white rabbit in Peri's hallucination sequence.
- Early Installment Weirdness: For the first story, the artist had no idea yet what the back of Six's coat looked like, and simply improvised.
- Friend to All Living Things: He has an impressive zoo in his TARDIS, and spends a lot of his adventures befriending various animals.
- Guile Hero: Having a companion who can shapeshift offers endless possibilities in this regard.
- Magic Music: Leads a group of renegade robots away from a city, Pied Piper style, with a grand musical number.
- Mr. Fanservice: Gets a bit of a Hot Springs Episode moment at the beach.
- Rogues Gallery: Josiah W. Dogbolter, Astrolabus, Vegar the Vengeful, Funhouse, Skeletoids, Cybermen, Kymbra Chimera, Seth, and Voord.
- Took a Level in Kindness: Compared to the TV series.
Tropes associated with the Virgin Missing Adventures
- Rogues Gallery: Ashley Chapel, Avron Jelks, Cybermen, the Great Intelligence, High Churchman Garon, Krllxk, & the Rani.
Tropes associated with BBC Past Doctor Adventures
Tropes associated with Big Finish
(In)famous for being a darker and grittier Doctor, Six is allowed to grow as a character in Big Finish and expand beyond his unstable origins of the TV show. He's still an insufferable know-it-all with a fondness for creative insults and poor fashion sense, but with plenty of Lampshading and alternative clothing this time around, and his travels sees him gradually mellow out him a bit. His new adventures notably show a kindness and depth that often was not there in the series.
- Adaptation Decay: A victim of this In-Universe. In an alternate timeline, the Doctor became Earth's greatest hero after saving it from a Dalek invasion in 1903. In 2003-A, action figures and movies about his exploits are available for mass consumption. Movie!Doctor is a ripped, catchphrase-spouting jackass who snogs a Younger and Hipper Evelyn.
- Arch-Enemy: The audios give further development to the animosity the Sixth Doctor had with Davros and the Valeyard in the television series. The Valeyad even serves as the Final Boss of the Sixth Doctor's life.
- Batman Gambit: A big fan of them.
- Belligerent Sexual Tension: With Iris Wildthyme, quite a bit more strongly than she manages with most other incarnations of him. The fact that her future self manages to hypnotise him into fancying her in "The Wormery" certainly helps.
- Big Damn Kiss:Doctor: If I was really a Time Lord, would I do... THIS? (grabs Sally-Anne into a deep kiss)
Monster of the Week: (Absolutely stunned) Noooooo. No. No. No. A Time Lord certainly wouldn't do that!
- Break the Haughty: His stories with Peri tend to be light-hearted and have very little Character Development. His Story Arc with Evelyn, however, gradually breaks him. "Jubilee" is the first story to really properly traumatise Six, after which "Arrangements For War" sees him emotionally going off the deep end. His main arc revolves around him being forced to come to terms with his crass and often flippant attitude and the severe consequences of his behaviour. Shortly after Evelyn leaves, Six has to work together with a younger version of himself, and he cannot stand said younger self's arrogance.
- Changed My Jumper: A chronic offender with the infamous coat, but he has the good sense to change into more practical clothes at times. Notably, in his first story with Evelyn (i.e. the arc that was written deliberately to give him Character Development), he changes into a Third Doctor style velvet-and-ruffles ensemble for a visit to the Queen of England.
- From "Real Time" up until "The Wrong Doctors", Six is seen wearing a blue outfit that, while very similar in design taste to his normal outfit, is a series of tasteful and non-clashing blue hues. Really, it's quite nice. (Started out as a case of Limited Animation, since "Real Time" was also released as a semi-animated webcast. None of the artists involved felt like drawing Six's coat, so the blue hues were created as a compromise. The audio-only edition has a short scene to explain it: Six thought Evelyn wanted to see his "mourning" coat. She was curious about his morning coat.) He returns to his original coat after a version of Mel makes a wistful remark about missing the old one "her" Six wore.
- Character Development: Heaps. His stories with Peri have him very similar to the way he was in the TV series, but episodes taking place after that show a much softer side of him. He grows to care very deeply for Evelyn, and has no problem saying he loves her — as a friend — in "Real Time", pretty early on in their Story Arc.
- Cloning Blues: In "Project: Lazarus".
- Combat Pragmatist: Possibly his most defining trait.
- Cuteness Proximity: Unlike Five, who doesn't care for cats one way or the other, Six gleefully defaults to baby-speak when he's near them.
- Drinking Contest: Gets into one, in song, in "Doctor Who And The Pirates".
- The Dreaded: With a dash of The Red Baron thrown in, the Sixth Doctor built himself a reputation so awful, that he was a being of enormous power that could create sinkholes swallowing armies whole called The Sandman. He did this to tame the awful Always Chaotic Evil Galyari race, a species that otherwise would wage war until nearly all life would be terrorized by it. He then made several trips into their respective future to ensure they stayed on the straight and narrow.
- Famous Last Words: In The Brink of Death, after being warned of the Valeyard's plot by his future self, the Doctor sacrificies himself to the Rani's attack. As he succumbs to radiation poisoning, he reflects on his time with; "All those lives I've lived. I hope... the footprint I leave... will be... light, but apposite..."
- Then, after he slips into unconsciousness, he hears his seventh persona emerge and responses with; "Who said that? Who is that? Who's... there?..."
- Meanwhile, as his future self slips away as the timeline changes, he says this in unison with the Seventh Doctor; "Our future is in safe hands."
- "Freaky Friday" Flip: With Davros!
- Future Me Scares Me: Once Six has had enough Character Development to admit that he's a Jerkass, he also quietly reflects on how his next incarnation will not be very emotionally accessible either, from what he's seen. "Always blowing up planets."
- Grand Finale: "The Last Adventure", giving him a desperately needed regeneration story where he had once been ousted from the show without warning, finally proving that Big Finish has completely rescued his Doctor. He's also the only Doctor to have an audio finale as opposed to a televised final story, since former BBC controller Michael Grade got the drop on him.
- Heroic Suicide: Knowing that the Valeyard's Assimilation Plot against the Time Lord society hinges upon his existence, the Doctor does not hesitate to influence his past self into making a move that leads to him getting lethally injured. To add more to it, the Doctor was even in doubt whether or not he would able to regenerate his way out of that situation, but he went ahead and did it any way. Fortunately, his regeneration does trigger and turns him into his Seventh incarnation.
- Hurricane of Euphemisms: Especially when frustrated or angry. In the "The One Doctor", one character remarks that talking to him is "like arguing with a bloody thesaurus!" Later in the same episode, he loses his willingness to debate altogether...Sixth Doctor: If I have to endure another insult—
Banto Zame: Oh here we go, another voyage 'round the English language...
- Hypocritical Humor: His "do as I say, not as I do" attitude is Played for Laughs with great frequency in Big Finish. This contributed hugely to him getting Rescued from the Scrappy Heap.Peri: Don't shout, Doctor! There might be—
Sixth Doctor: SHOUT?! I don't SHOUT! People who have to resort to shouting to get what they want are merely demonstrating THE INHERENT PAUCITY OF THEIR ARGUMENT! IT'S SOMETHING THAT I NEVER, NEVER—
Peri: All right, Doctor!!
Sixth Doctor: Point made, I think.
- "I Am" Song: In the Musical Episode "Doctor Who And The Pirates", he sings a truly fantastic Major General Song.
- I Ate WHAT?!: The Doctor suffers fainting fits brought on by the polluted timeline of 2003-A. He's given a swig of vile black liquid to revive him, which turns out to be fluid produced from a Dalek after it's been tortured. The goop is then bottled by guards and sold as a delicacy.
- I Hate Past Me: Calls Five "tediously noble". To his face. (Sirens of Time)
- Under duress, however, he finally cracks and admits to Evelyn that being the Fifth Doctor was like being on holiday... a very wonderful holiday. (The 100 Days of the Doctor)
- Also played with in "The Wrong Doctors", where you have the Sixth Doctor encounter... the Sixth Doctor. The Sixth Doctor who's already been through his big emotional Big Finish Story Arc (distinguished by his blue outfit and calmer dialogue) finds his younger self to be pretty annoying.
- I Need a Freaking Drink: Six takes more to alcohol than most Doctors, and has a fondness for hanging out in bars and pubs, sometimes to cope with tragedy.
- Jerk with a Heart of Gold: Unlike the hard-to-see-but-still-there heart of gold seen in the TV series, Colin Baker's Sixth Doctor in Big Finish shows an incredible empathy toward his companions when the situation calls for it. Oh, he's still very much alien in how he expresses it, but his treatment of Dr. Evelyn Smythe shows the change of his character from his original premiere in the 1980s.
- Logical Weakness: How can this most verbose of Doctors talk his way out with an enemy that is language itself? (...Ish)
- Master of the Mixed Message
- Musical Episode: "Doctor Who And The Pirates" is a fantastic one.
- Needle in a Stack of Needles: In the aptly-titled 100 Days of the Doctor, an anonymous party announces that they've ordered a hit on the Doctor, now dying from a biological agent. The Doctor now has a hundred days to discover when and where he was struck with a microscopic needle....during his fifth incarnation. Factor in all the planets he's visited and every single person who might conceivably want to kill him..."Best get moving, especially since—oh dear. I've just felt a sudden twinge in my kidneys."
- Not So Different: From Davros. The two get a few episodes together with fantastic verbal sparring, and the trope eventually culminates in a "Freaky Friday" Flip, of all things.
- And during his brief Odd Friendship with "Bloody" Queen Mary I, he becomes quite terrified when he realises how similar they are.
- Orphaned Punchline: "Is that a sausage?!" This joke went over pretty well with an auditorium full of tweed. (...Ish)
- Red Baron: He's something of a superstar in his own trade; that is, at the annual lexicographer's convention, where he is introduced by the emcee as a "master of English" and "a raconteur and bon vivant of bon mots!" (...Ish)
- Reunion Show: Though not limited solely to him, Six has a tendency of actually reuniting with companions and friends who traveled with his other incarnations. This includes Thomas Brewster, Jamie and Zoe, Henry Gordon Jago, George Litefoot, Charley Pollard, Romana, Leela and even Mike Yates. Peri and Mel get special mention; though they already traveled with the Sixth Doctor, Mel was reunited with him twice (both times a first meeting between either her or the Doctor before they started traveling in a more traditional manner), whereas Peri died and was reunited by way of a split-timeline duplicate, allowing her to travel with him. It's all a bit of a nostalgia trip at times.
- Rogues Gallery: Axos, Beth Pernell, the Celestial Toymaker, Cybermen, Daleks, Davros, the Eminence, Ice Warriors, Josiah W. Dogbolter, Krotons, Myriads, the Rani, Dr. Robert Knox, Silurians, Sil the Mentor, Sontarans, William Abberton, Wirrn, the Wishing Beast, the Valeyard, and Viyrans.
- Smug Snake: Pre-character development. He is as good as he says he is, but is still obnoxiously arrogant.
- Sesquipedalian Loquaciousness: Weaponised a few times over.
- Stealth Pun: Extremely fond of them, often in the middle of a hurricane of more obvious puns.
- Then Let Me Be Evil: Downplayed. Faced with the Valeyard almost pulling off a successful Assimilation Plot upon Time Lord society, the Sixth Doctor chooses to end his life in order to ensure that the Valeyard and his plan goes down with him. The Valeyard calls him out on this, asking what that such an act would mean for the Doctor's "precious moral scruples". The Doctor grimly replies "They died with me," heralding his incoming successor's darker, colder, and more manipulative nature, but the essence of what the Doctor is at the core — a protector — stays the same.
- To the Pain & Ticking Clock: The Doctor suffers through a slow-motion assassination after being injected with a synthetic, sentient virus. ("The 100 Days of the Doctor")
- The Valeyard does it again to him in "The Brink of Death", even extending the time he has left to watch him squirm some more. Big mistake, as gives the Doctor the opportunity to turn the tables on him.
- Took a Level in Kindness: He's plenty mean towards Peri just like in the TV series, but when he meets Evelyn (after Peri leaves the TARDIS), she mellows him out a lot with her no-nonsense attitude, her warm demeanor and her chocolate cakes. The fact that Big Finish insists on breaking Evelyn over and over certainly helps, and she and Six become very emotionally close in the process. By the time he unexpectedly runs into his old self (in a bit of time travel mishap involving Mel), the contrast is very noticable.
- His treatment of Peri did shift slowly over the course of his time with her - very slowly, but it was there. The difference becomes far more pronounced, however, once he's reunited with a split-timeline version of her and they begin travelling. She and Six still have legitimate grievances with one another, but they get along far better than before.
- Torture Porn: "Jubilee" sees him broken more thoroughly than any other Doctor in any episode. In the alternate timeline he loses his mind, his companion and his legs, and that's just the start of it. When the Evelyn from the original timeline meets him, she is shaken to the core, and the memory flashes of the merged timelines hit Six, he's none too well adjusted to them.
- "Project: Lazarus" also revels in the trope.
- Tragic Bromance: With Evelyn.
- Won the War, Lost the Peace: A future version of the Sixth Doctor fought to liberate Britain from Daleks, a struggle which ended with the lone Dalek survivor agreeing to a cultural exchange. Flash-forward a hundred years, when the despotic British Empire has monopolized the Daleks' technology to conquer the world. The war is a historical footnote, mere fodder for B-grade movies and crass pageantry. It becomes clear by the end of the story that mankind has come to resemble the Daleks (as intended, it turns out).