Spooks

After the explosion at the hotel, Section D are back in action.

Beth goes undercover for the first time for MI-5.

An FSB Officer is welcomed onto the Grid to help track down a rogue nationalist from Azakstan.

A trio of Chinese agents arrive in London and the team must find out why.

Beth and Dimitri go undercover as Home Office representatives, in order to protect the American president who is in London for top-secret peace talks.

The relationship between the CIA and MI-5 are put to the test when things go wrong in Afghanistan.

Vaughn raises his manipulation of Lucas to a new level, and Ruth is approached by a council snooper.

The team face their toughest challenge ever: tracking down Lucas North, their Section Chief, friend and one of the best agents MI5 has ever had. Harry decides the team are too close, and brings in a specialist to help with the hunt. However, it will not be easy to find a man who has nothing left to lose, and as the search becomes increasingly desperate, Harry and Lucas become embroiled in a deadly game of cat and mouse.