The Twelfth Doctor is in a British television show.
`` The Time of the Doctor '' is an episode of the British science fiction television programme Doctor Who , written by Steven Moffat and directed by Jamie Payne , and was broadcast as the ninth Doctor Who Christmas special on 25 December 2013 on BBC One . Twelfth Doctor . Capaldi 's first full appearance as the Doctor was at the end of the 2013 Christmas special `` The Time of the Doctor '' . In the tenth series of Doctor Who , he is accompanied by two new companions : Nardole ( Matt Lucas ) and Bill Potts ( Pearl Mackie ) .