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
An Adventure in Space and Time of Castamere". "An Adventure in Space and Time" was released on DVD on 2 December 2013 in the UK. A 3 disc Blu-ray set was released in the US and Canada 27 May 2014. The set includes the feature on Blu-ray, DVD and An Unearthly Child DVD. The special was re-released on DVD and Blu-ray on 8 September 2014 as part of a "50th Anniversary Collectors Boxset" alongside "The Name of the Doctor", "The Night of the Doctor", "The Day of the Doctor", "The Time of the Doctor" and "The Five(ish) Doctors Reboot". Edmund Butt's score was released by Silva