The Grid is faced with the threat of a terrorist attack by a member of Iranian intelligence which could jeopardise an historic peace deal with Iran.
Episode 2
With Britain on the verge of a plague epidemic, the team must track down and quarantine anyone infected. Meanwhile, Harry orders the interrogation of spies from all nations likely to have a vaccine.
Episode 3
A plane crashes near an American airbase. Was it shot down on purpose and, if so, was Iran involved? With the team unaware of her kidnap, Ros is subjected to mental torture.
Episode 4
When intelligence is received that an Algerian extremist is planning a terrorist attack on London, Adam urges Ana, his contact in the Iranian Embassy, to spy on her husband.
Episode 5
Attempting to stop an Iranian nuclear deal on British soil, Adam is framed for the killing of a mugger, who turns out to be a journalist investigating the Tehran train bomb.
Episode 6
Boarding a flight to Tehran, can Adam and Ros find and stop the passenger carrying nuclear triggers to Iran?
Episode 7
The announcement of a new peace accord between Britain, America and Iran is disrupted when armed infiltrators hijack the television broadcast.
Episode 8
When Ros’s involvement with Yalta is uncovered, Harry comes face to face with the chief of the shadowy anti-American organisation.
Episode 9
The team race against time to find and deactivate a bomb planted in central London by an ex-IRA operative. They must also discover who is really behind the plot to kill them.
Episode 10
The team learns the fate of Zaf, and Adam’s focus on preventing an al-Qaeda attack on a London school is diverted when Jo is kidnapped by a group of mercenaries.