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
Doctor Who in Australia episode ended on BBC One. Immediately afterwards, each episode became available on iView for one week, with an ABC2 encore broadcast at 8:30 the following (Monday) night. Later in the year, ABC1 took a live simulcast from the BBC to screen "Doctor Who Live: The Next Doctor", the half hour special in which the actor chosen to play the Twelfth Doctor was revealed before a live studio audience, on Monday 5 August at 4am. The special was replayed on ABC2 at 8:30pm on that same day. Purposefully timed as part of the ABC's recognition of "Doctor Who's" 50th Anniversary celebrations,