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 Bradley (English actor) David Bradley (English actor) David John Bradley (born 17 April 1942) is an English actor. He is known for playing Argus Filch in the "Harry Potter" film series, Walder Frey in the HBO fantasy series "Game of Thrones" and Abraham Setrakian in the FX horror series "The Strain". He is also an established stage actor with a career that includes a Laurence Olivier Award for his role in a production of "King Lear". Other acting credits include the BBC series "Our Friends in the North", the ITV series "Broadchurch" (for which he won the best supporting actor award at the