Following "Lesser of Two Evils", the bomb in Tom Quinn's house fails to detonate, but another device goes off elsewhere, killing the Secretary of State for Northern Ireland. Patrick McCann is killed by his group for collaborating with Tom. Section D are then focused on a bombing at a secret military base in Longcross, when it has emerged that wanted Serbian war criminal Miroslav Gradic has entered Britain. Gradic's group has stolen munitions from Longcross and a military convoy to attack the Bri
Section D investigate the activities of radicalised mullah Mohammed Rachid, and learn he is using a Birmingham mosque to recruit young suicide bombers. After the section's last asset is discovered and tortured, recent transfer from Government Communications Headquarters (GCHQ) Ruth Evershed finds another potential asset, Algerian agent Muhammed Ibhn Khaldun who faked his death to his agency and smuggled himself to the UK to defect. His defection soon attracts the attention of the Central Intelli
A computer hacker threatens to breach MI5's firewalls, putting the lives of two cornered agents in Pakistan at risk. When Section D suspect Gordon Blaney, a member of the Socialist Freedom Movement, an anti-government group, Zoe is tasked to go undercover as a teacher in the same comprehensive school Blaney teaches. Meanwhile, Danny Hunter works to infiltrate a left-wing newspaper where the socialists operate. It is later revealed that Blaney and the socialists were elaborately framed by the hac
Banker Sir Richard Bowman and government advisor Amanda Roke request Harry's help when stock trader John Lightwood steals $1 billion from Bowman's bank and goes missing. When Lightwood is found literally crucified, Danny goes undercover as his replacement and learns Lightwood was laundering money for the Russian mafia, who stole $20 billion of aid money from the Americans, to a highly secure Swiss bank, and was killed for stealing from them. When Zoe is found to be having an unauthoris
The Grid (the team's offices) is in lockdown for an EERIE (Extreme Emergency Response Initiative Exercise) drill of a hypothetical terrorist attack in London. With Tom as the emergency executive officer, the team is told that VX nerve gas has been released and is spreading across the city, and conclude that the attack is real. The Grid loses power, and the trapped team try to make contact with the outside world. They soon exhibit signs of cabin fever, especially after they find out that Harry is
When United States President George W. Bush is making a brief unannounced visit to the UK, CIA liaison Christine Dale works with MI5 to ensure the visit goes smoothly. Vicky, bitter over the break up, releases Tom's address and phone numbers on personal advertisements, falsely promoting him as a call boy, on telephone boxes and nightclubs throughout Soho, garnering him some unwanted attention. He has Sam Buxton find and destroy all copies of the ads, while Christine confronts Vicky to make her s
Harry's house is burgled by small time thieves, with a briefcase among the items stolen. The briefcase contains files relating to "Firestorm", a specialist electromagnetic pulse weapon developed by rogue French scientist Henri Durand, who is selling the weapon to Chinese buyers. Harry and Tom find the thieves, among them 14-year-old Jason James "JJ" Franks, and discover that they burned the files, including the codes needed to steal Firestorm. When it is revealed that JJ knows the codes thanks t
Running on a tip from Corporal Eric Woods that Samuel Curtis, a decorated British Army Major, is plotting a mutiny to get the government to make improvements to the military, Tom goes undercover as a soldier to uncover the plot. After two weeks, an increasingly frustrated Tom finds no evidence that Curtis is planning such an action, only that he is starting a petition instead. However, during an interrogation exercise, Woods unintentionally reveals the MI5 operation to Curtis, who is indeed plot
Eight Customs & Excise officers are killed by the Chala, a ruthless Colombian cartel led by Rafa Morrientes, who is in England to meet with powerful businessman Ross Vaughan. Tom and Zoe go undercover to befriend Mariela Hernandez, Rafa's girlfriend, while Danny spies on Rafa's meetings. There, Section D learns that Rafa is trading cocaine for surface-to-air missiles with Vaughan's help. Meanwhile, Sam unknowingly spies on the team for former officer Tessa Phillips, who was fired for running pha
Christine hands Tom a CIA document indicating that a terrorist cell is hiring Michael Karharias, an American assassin, to kill a member of the British Cabinet. Tom enlists the help of Danny and Zoe to catch Karharias. Danny follows Tom and finds he is creating a legend, something Tom denies. When they follow CIA agent Zeigler, the three are captured, where it appears their captors are working with Tom. Danny and Zoe are left to escape and inform Harry of what they believe; that Tom has become a