The country is plunged into chaos by a series of terrorist attacks.
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1. Gas and Oil (Part 1) - The country is plunged into chaos by a series of terrorist attacks.
With their attempt on the home secretary's life foiled, the coup plotters up the stakes.
Zafar infiltrates a terrorist cell to persuade an extremist to become an MI5 double agent.
Ros and Zaf go undercover at a World Trade Summit to try and solicit a yes vote.
Ruth becomes the pawn in a dangerous game after she witnesses a man committing suicide.
Harry has agreed to help the British Government secure a deal with Saudi Arabia.
The hostage-takers in the Saudi embassy issue their demands to the Saudi King.
Adam goes undercover to investigate attacks on Muslims by a Christian group.
The team must protect a witness in the trial of a war criminal who has earned immunity.
Environmental terrorists storm the Thames Barrier and threaten to flood London.