Peter Capaldi’s final episode of Doctor Who this Christmas will feature Pearl Mackie as Bill Potts and be called Twice Upon a Time, it was revealed this evening (23 July) during a cast panel at San Diego Comic Con. Viewers will have to wait until Christmas to discover exactly how Bill, who will appear throughout the episode, makes her return.
Til Schweiger,Lauren Lee Smith,Sebastien Roberts,Stefanie von Pfetten,Michael Clarke Duncan,Art Hindle,Sonja Smits,Eric Roberts,Kenneth Welsh,Ned Bellamy