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: The Early Adventures portrayed the role of original Barbara actress Jacqueline Hill in the 2013 drama "An Adventure in Space and Time", and Dan Starkey as the Sontarans. The second story also features actor James Joyce in the role of a new companion, Jospa. <section begin=series3 /><section end=series3 /> Frazer Hines, Anneke Wills, Elliot Chapman and Wendy Padbury reprise their roles as the Doctor's companions, with Frazer Hines also playing the Second Doctor. Other characters are also played by Anjella Mackintosh, Wanda Opalinska, Kristina Buikaite, Alistair Petrie, Debbie Chazen, Matilda Ziegler, David Sibley, Kerry Gooderson, Ewan Bailey, Alan Blyton, Judith Roddy, Adam Newington,