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
Doctor Who in Australia episode ended on BBC One. Immediately afterwards, each episode became available on iView for one week, with an ABC2 encore broadcast at 8:30 the following (Monday) night. Later in the year, ABC1 took a live simulcast from the BBC to screen "Doctor Who Live: The Next Doctor", the half hour special in which the actor chosen to play the Twelfth Doctor was revealed before a live studio audience, on Monday 5 August at 4am. The special was replayed on ABC2 at 8:30pm on that same day. Purposefully timed as part of the ABC's recognition of "Doctor Who's" 50th Anniversary celebrations,