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 (English actor) "Band of Gold". In 1998, he appeared in the BBC adaptation of "Vanity Fair" as the miserly Sir Pitt Crawley, and "Our Mutual Friend" as the villainous Rogue Riderhood. Other television appearances include the 2001 series "The Way We Live Now", directed by David Yates, who would work with Bradley five years later on the "Harry Potter" films. From 2002–04, Bradley starred as Jake in the BBC comedy series "Wild West". Bradley acted in the 2004 musical drama serial "Blackpool" on BBC One. He appeared in the 2005 BBC drama "Mr. Harvey Lights a Candle", playing the role of a