TV-PG
S5 • E2 Apr 9, 2010 42m7.6
The Doctor and Amy travel to a future time where all of the residents actually live in a orbiting spacecraft, Starship UK. The Doctor soon realizes that while the spaceship is moving through space, it isn't powered in the conventional sense. Amy meanwhile is given the opportunity to learn the truth but chooses to have her memory erased. The Doctor is faced with unacceptable options and it's Amy who makes the final decision on what to do.
