Cold blood - Synopsis

The BBC Press Office have published a brief synopsis for Doctor Who: Series 5 - Episode 9, Cold Blood, by Chris Chibnall.

It is the most important day in the history of Earth: the dawn of a new age of harmony or the start of its final war.

In the latest episode of the time-travelling drama, written by Chris Chibnall, The Doctor must face his most difficult challenge yet. It is a battle in which he cannot take sides and a day when nobody must die...