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) suggested that the character uses the name "the Doctor" because his actual name is impossible for humans to pronounce. For instance in the novel "Vanderdeken's Children", it's told that the Doctor already told Sam his real name which is entirely alien and virtually unpronounceable. This is repeated by companion Peri Brown in the radio serial "Slipback". The Faction Paradox encyclopaedia "The Book of the War" states that all renegades from the Homeworld/Gallifrey abandon their names to symbolise how they leave their culture. Similarly, the novel "Lungbarrow" reveals that the Doctor's name has been struck from the records of his family