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
David Bradley (director) David Bradley (director) David Shedd Bradley (6 April 1920 in Winnetka, Illinois – 19 December 1997 in Los Angeles, California) was an American motion picture director, actor, film collector, and university instructor. David Shedd Bradley was a grandson of Charles Banks Shedd, a prominent Chicago real estate investor, banker, and financier, and civic leader who also served as an executive officer of the Knickerbocker Ice Company of Chicago, which had been founded principally by Edward Avery Shedd, younger brother of Charles Banks Shedd. He attended the Todd School for Boys (from which Orson Welles had graduated in 1931) from 1935