The Story of a mad Man with a box series 6 (Doctor Who)

Amy, Isabella Ronald Rory and River Song receive invitations to the Utah desert where they meet the Doctor, who claims to be nearly 200 years older than when they had last seen him and says that he will take them to "Space: 1969". As they dine beside Lake Silencio they witness an unknown figure in a spacesuit kill the Doctor and are then met by an old man called Canton Everett Delaware III, who had also been invited. They meet a younger version of the Doctor who had been invited and land in the Oval Office in 1969, where they are enlisted by President Nixon to assist a younger version of Canton in saving a terrified little girl from a mysterious spaceman. The Doctor traces her to a warehouse in Florida where they investigate, unaware that the warehouse contains creatures which they forget after looking away from. After Isabella tells the Doctor she is pregnant, the little girl appears in a spacesuit and Isabella shoots at her.