|summary=Em and Finn are being held prisoner by the Doctor. They never see each other but are able to communicate through the cell wall. This is a blessing but also a curse: they can each hear the interrogations and torture meted out to the other. Neither talks but how much can they take? And then Em finds a note hidden in her cell. It's from her future self and it tells of fourteen escapes. And fourteen failed trips back to the past to try to put things right. There's only one way left. Em must kill someone she loves.