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 Name of the Doctor to kill the Doctor's allies unless the Doctor says his name to unlock the TARDIS doors. The Doctor refuses, but as he speaks, River says the Doctor's name and unlocks the TARDIS. Inside, the Doctor reveals a pulsating column of light to be his time stream. The Great Intelligence enters it in order to undo the Doctor's past as revenge for all the defeats it has been dealt. The positive effects of the Doctor's travels begin to be nullified by the Intelligence's interference. Jenny and Strax both disappear. Clara remembers the Doctor telling her that she has helped the Doctor