Twice Upon a Time (Doctor Who) The Doctor paraphrases philosopher Bertrand Russell when he advises his future self that "hate is always foolish and love is always wise". Peter Capaldi reprised his role as the Twelfth Doctor. On 30 January 2017, he confirmed that the tenth series would be his last, and that he was set to leave after the 2017 Christmas special. The episode also sees the introduction of Jodie Whittaker as the Thirteenth Doctor, whose casting was announced on 16 July 2017. David Bradley appears in the episode as the First Doctor, having previously portrayed William Hartnell in the docudrama "An Adventure in Space
Space and Time (Doctor Who) TARDIS dematerialises while the outer TARDIS (being the same TARDIS) does the same, and the Doctor assures Amy and Rory that they are now back in "normal flight", and then advises Amy to "put some trousers on". "Doctor Who" had previously aired two related specials for Comic Relief. The first was the 1999 spoof "The Curse of Fatal Death", which was also written by Steven Moffat. The spin-off series "The Sarah Jane Adventures" produced its own mini-episode "From Raxacoricofallapatorius with Love" for the 2009 Comic Relief appeal. Unlike "The Curse of Fatal Death", "Space" and "Time" are considered to be