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) night and the storm in the heart of the sun, he's ancient and forever, he burns at the centre of time..." and "the man who can turn an army around at the mention of his name". Though the Doctor tends to present a jocular, even childlike, persona, when the stakes rise—e.g., in "Pyramids of Mars" (1975)—that mask tends to fall, revealing a Doctor who is cold, driven, at times callous. This dark side sits in contrast to the Doctor's deep compassion, which manifests to different strength and effect across their incarnations. The Doctor prefers a pacifist solution to most problems,