Second Doctor
The Second Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series "Doctor Who". He was portrayed by character actor Patrick Troughton.
Doctor Who (season 22)
Patrick Troughton and Frazer Hines return to play the Second Doctor and his companion Jamie McCrimmon in "The Two Doctors". Their last on-screen appearance was (briefly) "The Five Doctors" in 1983.Anthony Ainley returns in "The Mark of the Rani" as The Master.