Day of the Moon (S06E02)

The Doctor is locked in the perfect prison. Amy, Rory and River Song are being hunted down across America by the FBI. With the help of new friend and FBI-insider, Canton Everett Delaware the Third, they reunite to share their discoveries and memories. The world is occupied by an alien force who controls humanity through post-hypnotic suggestion and no one can be trusted. Aided by President Nixon and Neil Armstrong's foot, the Doctor must mount a revolution to drive out the enemy and rescue the missing little girl. No one knows why they took her, or why they kidnapped Amy Pond... (BBC America)