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
An Adventure in Space and Time However, the proposal was rejected, and Gatiss was told that there was no available slot or budget. In order to make the film understandable to a general audience, not all personnel involved in the creation of "Doctor Who" are represented. For example, the role of original story editor David Whitaker is merged with that of associate producer Mervyn Pinfield; co-creator Donald Wilson and writer C.E. Webber are also excluded. Part of the production involved the recreation of scenes from the classic series, including missing episodes such as "Marco Polo". Gatiss also had ambitions to recreate the death of Sara Kingdom