The past is like a foreign country: nice to visit, but you really wouldn’t want to live there. In 2003, Rebecca Whitaker died in a road accident. Her husband, Mark, is still grieving. He receives a battered envelope, posted eight years ago, 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.

Read by Clare Corbett, Touched by an Angel features the Doctor, Amy, and Rory, as played by Matt Smith, Karen Gillan, and Arthur Darvill in the spectacular hit series from BBC Television.