The Impossible Astronaut

The Impossible Astronaut

Available on Prime Video, Hulu, Max
S6 E1: Four envelopes, numbered 2, 3 and 4, each containing a date, time and map reference, unsigned, but TARDIS blue. Who sent them? And who received the missing number one? This strange summons reunites the Doctor, Amy, Rory and River Song in the middle of the Utah desert and unveils a terrible secret the Doctor's friends must never reveal to him.
Starring Stuart Milligan, Chukwudi Iwuji, Mark Griffin