9-th episode of 5-th season "Doctor Who"

What "Doctor Who" 9-th episode about

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. 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...

Episode number: 9

Episode name: "Cold Blood"

Episode release date: 29 may 2010 at 18:25

Status: aired