Spooks, Spooks

Harry has been kidnapped and the team's worst fears are confirmed when his killing is posted on the internet. However, Ros and Lucas refuse to accept he is dead.

A foreign government demands the right to execute its enemies on UK soil in return for replenishing Britain's dwindling energy supplies, but Jo and Lucas refuse to turn a blind eye.

Ros goes undercover at a meeting of a group of the world's richest men, and when terrorists take them all hostage she seeks help from an unlikely source.

Lucas's Russian torturer visits London with information he is willing to share only with his former prisoner, prompting fears he retains a psychological hold over the agent.

Harry's suspicions about a CIA boss's death are confirmed when three more intelligence officers are killed - fatalities that coincide with the re-emergence of Ros's former mentor.

An informant who could allow an almost bankrupt British government access to a billion pounds refuses to share vital data - and a group of assassins is looking for him.

A double agent reveals plans to incite conflict between Hindus and Muslims on British soil, but his handler is working with Caulfield, who will go to any lengths to silence him.

The Nightingale group plans to kill Pakistan's president at talks designed to stop the conflict between his country and India escalating into nuclear war.