Twice Upon a Time (Doctor Who) and Time". This makes him the third actor to play the role in the television programme, after William Hartnell and Richard Hurndall (in 1983's "The Five Doctors") since the premiere of "Doctor Who" in 1963. Bradley previously played Solomon in the 2012 episode "Dinosaurs on a Spaceship". The first trailer for the episode was shown during the 2017 San Diego Comic-Con, revealing the return of Polly, a companion from the end of William Hartnell's tenure as the First Doctor, portrayed by Lily Travers, and Pearl Mackie as Bill Potts. Also confirmed were appearances by Toby Whithouse, writer of seven episodes
William Hartnell "The Name of the Doctor". The following story and the 50th anniversary special of the show, "The Day of the Doctor", featured two new pieces of dialogue for Hartnell's Doctor, recorded by John Guilor, who had previously voiced the actor in a reconstruction of "Planet of Giants". Hartnell's Doctor also made a silent cameo appearance in the Series 9 episode "The Witch's Familiar" (2015) again played by a body double. David Bradley, who portrayed Hartnell in the biopic "An Adventure in Space and Time", played the First Doctor in the Series 10 episode "The Doctor Falls", and the 2017 Christmas