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
Doctor Who: The First Doctor Adventures These three actors also appeared alongside Bradley in the aforementioned BBC bio-drama. James Dreyfus joins the cast as an earlier incarnation of The Master prior to Roger Delgado. Announced in September 2017, The first pair of stories released on 25 December 2017, with a second pair due in July 2018. Confirmed in July 2018, a third duo will be released for January 2019. <section begin=series1 /><section end=series1 /> <section begin=series2 /><section end=series2 /> <section begin=series3 /><section end=series3 /> Doctor Who: The First Doctor Adventures The First Doctor Adventures is a Big Finish Productions audio play series based on the British