Touched by an Angel — Jonathan Morris

"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. Then he receives a battered envelope, posted eight years ago, containing a set of instructions and a letter 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 world. Because this time the Weeping Angels are using history itself as a weapon.