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) at least a somewhat respectable title. In "The Girl in the Fireplace" (2006), he draws an analogy between the title and Madame de Pompadour's. In "The Mutants" (1972) an official asks the Third Doctor if he is, in fact, a doctor, to which the Doctor replies "I am, yes"; when asked what he is qualified in, the Doctor replies, "Practically everything." The Fourth Doctor states that his companion, Harry Sullivan, is a Doctor of medicine, while he is "a doctor of many things" ("Revenge of the Cybermen", 1975). The Fifth Doctor claims to be a doctor "of everything" in "Four