The 6th Doctor Did Peter Capaldi's Doctor Who Casting Trick First
Peter Capaldi was cast as the Twelfth Doctor after he played another character in Doctor Who, but this casting trick was done first by Colin Baker's Sixth Doctor. On August 4th, 2013, the BBC revealed that the twelfth incarnation of The Doctor would be played by Peter Capaldi, known for his portrayal of corrupt politician Malcolm Tucker in The Thick Of It. However, Capaldi had also previously starred in Doctor Who as Pompeiian man Lobus Caecilius in season 4, episode 2, “The Fires of Pompeii."