Answering a call from UNIT, the Doctor arrives in London to find the streets deserted, apart from looters in possession of a valuable commodity - water.
Britain is suffering an extreme and bizarre drought. The cause is suspected to be extra-terrestrial.
The discovery of a signal being transmitted into space, and of a spacecraft whose crew are desiccated corpses, provides a possible answer. But the true enemy is an old foe of the Doctor’s.
The Cybermen have been patient, setting their plans in place over a number of years. As the final stage is implemented, in the darkest hour, the Doctor must identify who among his allies he can trust.
Has Prerequisite Story
19 out of 36 (52.8%) raters
say this story requires a previous story.