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
An Adventure in Space and Time 8.5/10. The website's critics consensus reads "Fun, clever, and eminently accessible, "An Adventure in Space and Time" offers entertaining viewing for Doctor Who newcomers and diehards alike." On Metacritic, it holds a weighted average score of 77 out of 100, based on 11 reviews, indicating "generally favorable reviews." On Monday 24 March 2014, "An Adventure in Space and Time" was nominated for three BAFTA Craft Awards; Suzanne Cave for 'Best Costume Design', Philip Kloss for 'Editing - Fiction' and Vickie Lang for 'Make Up and Hair Design'. Lang was successful in her category, with Gemma Chan presenting her the award