Peter Davison played the protagonist of a British science-fiction show.
Doctor Who is a British science-fiction television programme produced by the BBC since 1963 . The programme depicts the adventures of a Time Lord called `` The Doctor '' , an extraterrestrial being from the planet Gallifrey . The Fifth Doctor is an incarnation of the Doctor , the protagonist of the BBC science fiction television series Doctor Who . Peter Davison . His subsequent starring roles included the sitcoms Holding the Fort and Sink or Swim , the fifth incarnation of the Doctor in Doctor Who , Dr. Stephen Daker in A Very Peculiar Practice and Albert Campion in Campion .