In 2003, Rebecca Whitaker died in a road accident. Her husband Mark
is still grieving. He receives a battered envelope, posted eight
years earlier, containing a set of instructions with a simple
message: ‘You can save her.’ As Mark is given the chance to save
Rebecca, it’s up to the Doctor, Amy and Rory to save the whole
world. Because this time the Weeping Angels are using history
itself as a weapon.