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
Space and Time (Doctor Who) TARDIS had been previously explored in "The Time Monster" (1972) and "Logopolis" (1980), though both times it was the TARDIS of the Master. Amy also repeats one of her lines from "The Big Bang" at the end of "Space". The special was shot over two days alongside the made-for-DVD "Night and the Doctor" mini-episodes "Bad Night" and "Good Night". It was mostly shot on the first day, where all of the scenes with the TARDIS inside the TARDIS were filmed. Several tricks were used to create the illusion that there were more than one Doctor, Amy, and/or Rory. In scenes