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
Peter Brachacki were obviously the same sets as were used for the Doctor's TARDIS, slightly redressed. The TARDIS interior was completely redesigned again for the 1996 "Doctor Who" TV movie, and the new series that began broadcasting in 2005. Even then the central console was retained, and the new television series includes the geometric patterns on the walls. In 2013 the BBC produced a docudrama called "An Adventure in Space and Time", depicting the creation and early days of "Doctor Who", as part of the programme's fiftieth anniversary celebrations. Brachacki appears as a character in the drama, played by actor David Annen.