Paradise Towers two elderly residents ("rezzies") live. Tilda and Tabby explain that all the able-bodied men left the Towers to fight a war, leaving behind only children and the elderly. The only other man still loose in the Towers is Pex, a would-be hero, who appoints himself Mel's guardian. At the Caretaker control centre, the Doctor meets the Chief Caretaker, who greets him as the Great Architect, designer of Paradise Towers, and then promptly calls for him to be killed The Doctor cites an imaginary rule from the Caretakers' manual, confusing them enough to make his escape. Mel and Pex meanwhile have
The Doctor (Doctor Who) that existed between the Doctor's Eighth and Ninth incarnations. In the 2013 mini-episode "The Night of the Doctor", a prelude to the 50th anniversary special "The Day of the Doctor", it was revealed that the Eighth Doctor had been revived by the Sisterhood of Karn after dying in a spacecraft crash. The Sisterhood offered him an elixir that enabled him to choose the characteristics of his next regeneration, and he opted for "a warrior"; the final scene of the mini-episode shows him regenerating not into the Ninth Doctor, as had been widely assumed, but into the War Doctor, played in