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Played The Doctor in the films Dr. Who and the Daleks and Daleks - Invasion Earth 2150 AD in the mid-sixties.
Played The Warrior / The War Doctor, an incarnation of The Doctor who believed himself the destroyer of Gallifrey, thus disallowing himself the right to refer to himself as The D...
Played an alternative eleventh Doctor in the spoof episode, The Curse of Fatal Death in 1999.
Played The Watcher in Logopolis and Castrovalva (1981/82), though Nyssa suspects he was really The Doctor all along.
Played an alternative Thirteenth Doctor in the spoof episode, The Curse of Fatal Death in 1999. To date, she's the only female incarnation of The Doctor in any BBC produced...
Plays "The Doctor" in the episode The Next Doctor. Though this character is not an incarnation of The Doctor himself, but a wealthy and intelligent man called Jackson...
Played The Dreamlord; a character made of the negative parts of The Doctor's psyche, personified.
Played William Hartnell playing The Doctor in The Five Doctors (1983).
Played William Hartnell / The Doctor in An Adventure in Space and Time.