The Twelfth Doctor is in a British television show.
`` The Day of the Doctor '' is a special episode of the British science fiction television programme Doctor Who , marking the programme 's 50th anniversary . Twelfth Doctor . Capaldi made his first , very brief appearance as the Doctor in the show 's fiftieth anniversary special `` The Day of the Doctor '' ( 2013 ) , as one of the thirteen incarnations of the Doctor who are summoned to save Gallifrey from destruction .