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
The Doctor (Doctor Who) the regions" with a Scottish one, and so asked Tennant to affect the same accent he used for the earlier BBC period drama "Casanova". In contrast, Peter Capaldi was explicitly allowed to continue using his native Scottish accent as the Twelfth Doctor. In the Big Finish audio adventure "The Sirens of Time", the captain aboard a German U-boat assumes he is English because of the way he pronounces his words: "So, you speak German ... but you speak it like an English gentleman." The Doctor's clothing has been equally distinctive, from the distinguished Edwardian suits of the First Doctor to