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 Ultimate Adventure Doctor breaks his conditioning and defuses the bomb by putting it in a teapot. The play featured a female Prime Minister named in the script 'Mrs. T' (a reference to Margaret Thatcher). The Third Doctor addresses her as Margaret in the play whilst the Sixth Doctor addresses her as Maggie. The Third Doctor also mentions Denis, a reference to Denis Thatcher, Margaret Thatcher's husband. The play also features some musical numbers, including two from Crystal and "Business is Business" from Madam Delilah, the title of which acted as a catchphrase running throughout the play. The script featured numerous "Doctor Who"