Twice Upon a Time (Doctor Who) Twice Upon a Time (Doctor Who) "Twice Upon a Time" is an episode of the British science fiction television series "Doctor Who", written by Steven Moffat, directed by Rachel Talalay, and was broadcast as the thirteenth Christmas special on 25 December 2017 on BBC One. It features the final regular appearance of Peter Capaldi as the Twelfth Doctor, the first official appearance of Jodie Whittaker as the Thirteenth Doctor, and guest-stars David Bradley as the First Doctor, having previously portrayed original First Doctor actor William Hartnell in the 2013 docudrama "An Adventure in Space and Time". Pearl Mackie guest stars
The Sixth Doctor: The Last Adventure The Sixth Doctor: The Last Adventure The Sixth Doctor: The Last Adventure is a British audio drama based on the long-running British science fiction television series "Doctor Who". Within the narrative of the series, the Doctor, its principal character, is a time-travelling alien known as a Time Lord, whose biological characteristics allow him to regenerate into a new form to circumvent an otherwise deadly experience; the device has been used to allow for a change in lead actor every few years in the production of the televised series. The sixth such instance was depicted in 1987 at the very beginning