- Bernice Summerfield
- Big Finish Doctor Who
- Doctor Who Magazine
- Doctor Who New Adventures
- Doctor Who: The Curse of Fatal Death
- Eighth Doctor Adventures
- New Series Adventures
- Iris Wildthyme
- Peter Cushing films
- Scream of the Shalka
- Doctor Who (IDW)
- Doctor Who (Titan)
Miscellaneous Expanded Universe Doctors
Trevor Martin's Doctor
- Played by: Trevor Martin
David Banks' Doctor
- Played by: David Banks
- Green Aesop: Wore a big Greenpeace button.
- Nice Hat: A classic adventurer's hat.
- The Other Darrin: Kind of. And since David Banks played a main villain, he himself had to be replaced by his own understudy when he stepped in as the Doctor.
- You Look Familiar: David Banks is otherwise most famous in Doctor Who fandom for playing the Cyber-Leader throughout the classic stories.
Nicholas Briggs' Doctor
- Played by: Nicholas Briggs
- A Spot Of Tea: Extremely fond of it. Also wears a badge shaped like a teapot.
- Ascended Fanon: Though not ascended all the way into the canon Whoniverse, he became firmly established in the Doctor Who Expanded Universe.
- Bowties Are Cool: Wore a black one.
- The Cameo: In the audio version of Seven Keys To Doomsday, he appears at the beginning, regenerating into Trevor Martin's Doctor.
- Iconic Item: Carried a toothbrush in his pocket, similar to Five's decorative vegetable.
- The Nth Doctor: He's introduced in the comics as a future regeneration, though it's unclear which number. This was before Doctor Who was revived in 2005, so for a while, this was perfectly acceptable within the comics canon.
- You Look Familiar: Nowadays known as the Show Runner of Big Finish Doctor Who and as the voice of the Daleks and the Cybermen (and pretty much everything else) in the TV series.
Miscellaneous Expanded Universe Companions
The Minister of Chance
- Voiced by: Stephen Fry
- Aborted Arc: As noted below, he would have replaced the Doctor.
- Deadpan SnarkerMook: What are those?The Minister: Quantum dice. The sort of thing all the other children got to play with while you were being harshly potty-trained.
- Depowered: In the last episode, after he has abused his powers for a Roaring Rampage of Revenge.
- Expy: Of the Doctor.
- Large Ham: After his companion is killed, he gets very shouty.
- Reality Warper: As are all Time Lords, in this continuity. But they're not supposed ever to use their superpowers, because it destroys the fabric of the Universe.
- What Could Have Been: The original intention was that he would take over the Doctor's title at the end of the story, after the Doctor proper was Killed Off for Real.
- Played by himself
- All Just a Dream: The Doctor Who Expanded Universe went on to explain that it was all a surrealistic nightmare the Doctor had.
- Ascended Fanboy
- Awesomeness by Analysis/I Know Mortal Kombat: He's seen so much of the show that he knows exactly which buttons to press to finish the Sontarans.
- Name's the Same: Not the same Gareth Jenkins who works with the Big Finish productions. It is also not known if he is the Gareth Jenkins who defeats the Sontarans, but they aren't taking any chances.
Jimmy (or Dave) Forbes
- Played by: James Matthews (stage, 1974), Alistair Hudson (stage, 1984), Joe Thompson (Big Finish, 2008)
- Agent Scully
- Alternate Continuity
- The Danza: Named after James Mathews, who played him in the original stage production. In later stage productions, he was called Dave, but reverted to Jimmy for the audio.
- From Beyond the Fourth Wall: He and Jenny are (supposedly) members of the audience, who answer the on-stage Doctor's call for help and are drawn into his world.
- Jumped at the Call
- Played by: Wendy Padbury (stage, 1974), Theresa Milgate (stage, 1984), Charlie Hayes (Big Finish, 2008)
- Alternate Continuity
- Dressing as the Enemy: At one point, she ends up in a Dalek casing, complete with ring-modulated voice.
- From Beyond the Fourth Wall: As for Jimmy.
- Jumped at the Call
- Real-Life Relative: To herself, in a sense. In the audio version, she's played by Charlie Hayes — Wendy Padbury's daughter.
- Ordinary A-Level student
- Plucky Girl
- You Look Familiar: Played in the original stage production by Wendy Padbury (Zoe).
Miscellaneous Expanded Universe Villains
A Dalek built by humans with a poor grasp of its natural appearance. Named so because of his weirdly assembled body, with eyestalks for hands, a gunstick where the eyestalk should be, bumps where its slats and ear lights should be, and slats where its bumps should be.
- Meaningful Name: Given its nickname by the Eleventh Doctor for looking abnormal, after the titular Hunchback of Notre Dame.
- Nice Job Breaking It, Hero: Not only is Quasimodo Dalek built all wrong by unwitting humans, it's no surprise that the thing is just as dangerous as any other conventional Dalek when it activates.