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 1960s Dalek props crossing the bridge, in a recreation of a famous scene from "The Dalek Invasion of Earth" (1964). Interior scenes replicating early "Doctor Who" production at Lime Grove Studios were also filmed, with replicas of early television equipment being used. A number of the cast have appeared in "Doctor Who" at one time or another, most notably original companions William Russell and Carole Ann Ford. David Bradley appeared in the Series 7 episode "Dinosaurs on a Spaceship", while Jessica Raine was in the Series 7 episode "Hide" and the "Call the Midwife" charity cross-over mini-episode; Jeff Rawle