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
David Graham (actor) David Graham (actor) David Graham (born 1924 or 1925) is an English character actor and voice artist. Born in London, he trained as an actor in New York City following service in the Royal Air Force as a radar mechanic, and has since worked mainly in British television. Graham is known for his voice work for the series "Doctor Who" and "Thunderbirds" during the 1960s. Graham played several characters in the science-fiction TV series "Doctor Who" during the 1960s and 1970s, most notably Dalek voices in the serials "The Daleks" (1963–64), "The Dalek Invasion of Earth" (1964), "The Chase" (1965;