6.1 The Impossible Astronaut
Amy and Rory, River Song and a mysterious man each receive an envelope, numbered 2, 3 and 4, containing a date, time and map reference, unsigned, but TARDIS blue. This strange summons reunites them in the middle of the Utah desert and unveils a terrible secret the Doctor's friends must never reveal to him. After they meet up, they find a fourth envelope in a restaurant, sent to the Doctor, who joins them. Placing his life entirely in their hands, the Doctor agrees to join them on their mission. Their quest lands them in the Oval Office in Washington, D.C., where they are enlisted by President Nixon himself to assist enigmatic former-FBI agent Canton Everett Delaware III, in saving a terrified little girl from a mysterious spaceman.

6.2 Day of the Moon
The second episode of a two-parter, the FBI are looking for River Song, Rory and Amy. The world has been occupied by aliens that leave your memory the moment you stop looking at them; the Doctor and his companions can trust no one.

6.3 The Curse of the Black Spot
Aboard a 17th-century pirate ship the Doctor needs to win the trust of Captain Avery as his friends start to be influenced by a beautiful Siren (Lily Cole). Can the Doctor save them all before they fall for the siren's song?

6.4 The Doctor's Wife
In the hope of finding another Time Lord, the Doctor responds to a distress signal. Greeted warmly by Auntie, Uncle and Nephew, Idris' welcome is unusual.

6.5 The Rebel Flesh
On 22nd century Earth the Doctor finds humans using clones to perform dangerous tasks.

6.6 The Almost People
Continuing the story started in "The Rebel Flesh", the insane half-human, half-flesh mutant Jennifer is looking for revenge.

6.7 A Good Man Goes To War
In this mid-series finale, Amy is held captive on Demon's Run and the Doctor assembles an army of allies to recover her. Meanwhile, River reveals her greatest secret to the Doctor.

6.8 Let's Kill Hitler
The TARDIS crashes in 1938 Berlin where River Song tries to kill the Doctor.

6.9 Night Terrors
Eight-year old George is so terrified he can't sleep. His parents are unable to help, and the Doctor answers George's plea.

6.10 The Girl Who Waited
Amy is held in quarantine and Rory must free her. Unfortunately, Rory finds himself face-to-face with a future version of her, driven by anger, hatred and disappointment for both him and the Doctor, and Rory must make the biggest decision of his life.

6.11 The God Complex
The trio arrive at a hotel where the layout of the rooms keeps changing. It also contains rooms that hold the greatest fears of each visitor.

6.12 Closing Time
The Doctor visits Craig and meets the Cybermen again.

6.13 The Wedding of River Song
The Doctor travels to Lake Silencio, Utah to his death. But something is wrong with time.