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
Space and Time (Doctor Who) TARDIS dematerialises while the outer TARDIS (being the same TARDIS) does the same, and the Doctor assures Amy and Rory that they are now back in "normal flight", and then advises Amy to "put some trousers on". "Doctor Who" had previously aired two related specials for Comic Relief. The first was the 1999 spoof "The Curse of Fatal Death", which was also written by Steven Moffat. The spin-off series "The Sarah Jane Adventures" produced its own mini-episode "From Raxacoricofallapatorius with Love" for the 2009 Comic Relief appeal. Unlike "The Curse of Fatal Death", "Space" and "Time" are considered to be