Premise: Peter Davison . He became famous as Tristan Farnon in the BBC 's television adaptation of James Herriot 's All Creatures Great and Small stories . 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 .
Hypothesis: Peter Davison has been in more than three shows on the BBC.
Label: NEUTRAL