The Doctor Falls the episode, the Doctor (Peter Capaldi) must save himself and the remaining human population of a gigantic colony ship from Mondas, while also dealing with two different incarnations of the Master (Michelle Gomez and John Simm) at once. The episode features a cameo from the First Doctor, now portrayed by David Bradley. He had previously played William Hartnell, the original First Doctor actor, in the 2013 "Doctor Who" docudrama "An Adventure in Space and Time". Aboard the colony ship reversing from the event horizon of a black hole, the Doctor finds Bill has been converted into a Cyberman. The Master
An Adventure in Space and Time of Castamere". "An Adventure in Space and Time" was released on DVD on 2 December 2013 in the UK. A 3 disc Blu-ray set was released in the US and Canada 27 May 2014. The set includes the feature on Blu-ray, DVD and An Unearthly Child DVD. The special was re-released on DVD and Blu-ray on 8 September 2014 as part of a "50th Anniversary Collectors Boxset" alongside "The Name of the Doctor", "The Night of the Doctor", "The Day of the Doctor", "The Time of the Doctor" and "The Five(ish) Doctors Reboot". Edmund Butt's score was released by Silva