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
Doctor Who TV show of all time". During Jon Pertwee's second series as the Doctor, in the serial "Terror of the Autons" (1971), images of murderous plastic dolls, daffodils killing unsuspecting victims, and blank-featured policemen marked the apex of the show's ability to frighten children. Other notable moments in that decade include a disembodied brain falling to the floor in "The Brain of Morbius" and the Doctor apparently being drowned by a villain in "The Deadly Assassin" (both 1976). A BBC audience research survey conducted in 1972 found that, by their own definition of violence ("any act[s] which may cause physical and/or