Rose requests a trip back to the day her father, Pete Tyler, died. Reluctantly, the Doctor agrees, but he realises he has made a mistake, when Rose saves Pete from being run over by a car. This has now changed the timeline, and Reapers are transposing themselves all over the Universe. However, this time, the Doctor doesn't have a plan…

England, 1913. A schoolteacher called John Smith dreams of adventures in time and space. The Doctor, along with Martha, heads to a boarding school, but what he finds is far from ordinary...

It's 1913, and war comes to England early as the terrifying Family hunt for the Doctor.