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 from "The Daleks' Master Plan" using original actress Jean Marsh to play the increasingly aging Sara, and to use Super 8 footage of a recreation of the "Radio Times" publicity photo-shoot for "The Three Doctors", but the budget did not accommodate these ambitions. Principal photography for the film began in February 2013. Filming primarily took place at Wimbledon Studios in London, and the BBC Television Centre; it was the final drama to be recorded at the latter, which closed one month after filming concluded. Location filming took place on 17 February 2013, on Westminster Bridge in London. This involved replicas