The Doctor (Doctor Who) Time Lords a fixed number of twelve regenerations, meaning that every Time Lord had a total of thirteen incarnations including the original. The plot of "The Time of the Doctor" involves the Doctor receiving a new cycle of regenerations from the Time Lords before his expected demise, triggering the regeneration into the Twelfth Doctor, played by Peter Capaldi. The origins of the programme were explored in the docudrama "An Adventure in Space and Time" as part of the 50th anniversary celebrations of "Doctor Who", which starred David Bradley as William Hartnell. Although Time Lords resemble humans, their physiology differs in
David Graham (actor) the early voices of the Daleks, following the death of the Dalek designer Raymond Cusick. 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