Doctor Who Doctor's nature, somewhere between the twelfth and final incarnation. On rare occasions, other actors have stood in for the lead. In "The Five Doctors", Richard Hurndall played the First Doctor due to William Hartnell's death in 1975; 34 years later David Bradley similarly replaced Hartnell in "Twice Upon a Time". In "Time and the Rani", Sylvester McCoy briefly played the Sixth Doctor during the regeneration sequence, carrying on as the Seventh. For more information, see the list of actors who have played the Doctor. In other media, the Doctor has been played by various other actors, including Peter Cushing in
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;