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
Doctor Who in Australia ranging from 3:50am to 6:50am. From 8:30am the episode was available via iView and was subsequently broadcast in prime-time at 7:30pm that night, then replayed on ABC2 at 7:30 the following night. There was also a limited run of 3D cinema screenings of "The Day of the Doctor" around the country. ABC1 paired "The Day of the Doctor" with "An Adventure in Space and Time", the feature-length drama that recreated "Doctor Who's" formative years. It had its ABC1 premiere at 8:50pm, immediately following "The Name of The Doctor", as well as an encore screening at 1pm the following day. At