Amy, Rory, River and the Doctor receive a series of numbered envelopes, each containing a date, time and map reference. These messages bring them together in the middle of the Utah desert, where the Doctor's friends learn a terrible secret that must be kept from the Time Lord at all costs. However, who sent the envelopes, and who received the missing number one?

The Doctor is locked in a perfect prison. The FBI hunts Amy, Rory and River. The Doctor mounts a rebellion against an alien invasion.

The Doctor, Amy and Rory must solve the mystery of the disappearance of a pirate crew at the hands of a beautiful siren.

When he follows a Time Lord distress signal, the Doctor puts Amy, Rory and his beloved TARDIS in grave danger.

The Doctor, Amy and Rory arrive in a future Earth. The Doctor must prevent civil war when doppelgängers are liberated from their human originals.

The Doctor must convince terrified factory workers to work with their doppelgängers to overcome a monster of their own making.

A member of the Doctor's team has been abducted, and he will call in every favor and maybe even go to war to get them back.

The search for Melody Pond brings the Doctor and his friends to Berlin in 1938, face-to-face with Adolf Hitler, River Song and a justice-serving, shapeshifting robot.