Could the mysterious Family of Blood be working for an even bigger threat? It’s England in 1913 and war has come a year in advance as the sinister Family go in search of the Doctor.

But while John Smith briefly gets married, and refuses to accept his destiny as a Time Lord, the two women in his life, Martha Jones and Nurse Joan Redfern, have to take terrible measures to save the whole of history.

Spaced’s Jessica Hynes and Nanny McPhee’s Thomas Sangster guest star in the concluding part of this adventure.