Doctor Who:
* Doctor Who (1984-1986): Played the sixth incarnation of the Doctor, known for his flamboyant style and confrontational personality.
* Doctor Who: Dimensions in Time (1993): Reprised his role as the sixth Doctor in this charity special.
* Doctor Who: The Five Doctors (1983): Appeared as the sixth Doctor in this anniversary special, although he was not the main Doctor of the story.
* Doctor Who: The Curse of Fenric (1989): Voiced the character of the Master in this audio drama.
* Doctor Who: The Day of the Doctor (2013): Appeared as the sixth Doctor in this 50th anniversary special.
* Doctor Who: The Power of the Doctor (2022): Made a brief cameo appearance in this special, alongside the other former Doctors.
* Various Audio Dramas: Voiced the sixth Doctor in numerous audio dramas produced by Big Finish Productions.
Other Television Roles:
* The Tomorrow People (1973-1979): Played the role of Tim the Tool in this science fiction series.
* The Two Ronnies (1971-1987): Appeared in several episodes of this popular comedy show.
* The Bill (1984-2010): Had a recurring role in this long-running police drama.
* The New Statesman (1987-1992): Appeared in this political satire sitcom.
* Holby City (1999-2022): Played the recurring role of Dr. Anthony "Tony" Millwood.
* The Crown (2016-present): Played the role of Lord Snowdon in this historical drama.
* Death in Paradise (2011-present): Appeared in a guest role in this comedy-drama series.
Film Roles:
* The Hound of the Baskervilles (1978): Played the role of Frankland in this adaptation of the Sherlock Holmes story.
* The Adventures of Barry McKenzie (1972): Played a small role in this Australian comedy film.
* The Tall Guy (1989): Appeared in a supporting role in this romantic comedy.
* The Lost World (1992): Played the role of Lord John Roxton in this adaptation of the novel by Sir Arthur Conan Doyle.
Colin Baker has also appeared in numerous theatre productions and has done voice work for various animated series and video games.