This brilliant drama centres on a team of counter-terrorist spies, collectively known as Spooks. For the shadowy nature of their existence, technically speaking, Spooks don't even exist. They have no names, identities, or known locations. Yet these secret agents are all that stand between the nation and the terrorists who try to undermine national security.

Growing mistrust between the British, American and Iranian governments culminates in a series of high-risk operations at home, pushing the Section to its very limits.As Iran's race to become a nuclear power impacts on British and American security, the distinction between friend and foe becomes ever-more blurred. Harry and his team start to question exactly whose agenda they're working to and who they can trust - both on and off the Grid.