After shooting Adam, Angela jumps off the roof and kills herself. While Adam recovers, a gas and oil depot is attacked, followed by assassinations of some MPs. At first, MI5 suspect Al-Qaeda, but they discover that a group of influential businessmen, politicians and members of MI6 led by Jocelyn Myers are responsible, in an attempt to take control of the UK. Jo is tasked with protecting the Prime Minister's son. Colin is abducted and murdered by the conspirators. They launch another attack, taki
While Zaf is able to prevent the collision, the car bombs leave Juliet paralysed from the waist down. The conspirators manage to coax the PM to give in to their plan, including detaining citizens without trial, and to have armed police officers shoot people attending a protest to oppose their new plans. Harry is arrested and sent to a detention facility by the new rules, to prevent him from stopping them. However, the rest of the team are able to convince Ros that her father is the ringleader, a
Zaf goes undercover to infiltrate an Al-Qaeda cell, who are preparing to attack London with a thermobaric weapon. Ros also tasks Zaf to try to turn one of the members, who broke up with his girlfriend after converting to Islam. Jo and Adam pose as mercenaries to try to buy the weapon before it reaches the cell; the operation is cut short after the arms dealer assaults Jo and reveals the weapon has already been sold. By the time the weapon arrives in England, Adam is able to commandeer the weapon
Section D is tasked to ensure a successful "Addressing Africa" summit for the British Foreign Secretary. Adam and the team soon uncover a plot to assassinate an attending African president. After they successfully capture the would-be female assassin, Adam and the team find evidence that, after the summit, the president will buy weapons of mass destruction to commit a genocide against his own poverty-stricken people. Adam advises the assassin to escape, allowing her to successfully assassinate t
Ruth witnesses the Head of Security for Cotterdam prison commit suicide in an Underground station; the prison had recently suffered a fire that reportedly killed seven terrorist suspects. Ros, not yet comfortable within the team, is duped into helping frame Ruth for the guard's death (she later helps Ruth find the truth). Harry takes the rap for Ruth, but not wanting that to happen, Ruth is able to incriminate herself and works with the team to have Harry released, and fake her own death. It is
After a group of terrorists are discovered smuggling themselves into England, MI5 know a series of suicide attacks will happen during negotiations for the government to sell nuclear power to Saudi Arabia. During the operation to stop the attacks, Ros goes undercover seducing and drugging members of the Saudi Arabian royal family to get information. Meanwhile, Adam starts an affair with Wes' babysitter after she wakes him from a nightmare about losing Wes. One of the new members of Section D is a
The gunmen demand the release of al Qaeda prisoners, or they'll execute a hostage every hour. MI5 uncover the mole, who when caught, commits suicide so as to not divulge any information. Eventually, MI5 discover that the hostage situation is not al Qaeda's style. It is revealed that the hostage takers are in fact Mossad agents trying to stop the nuclear deal. After Ros provides some needed intel, SAS is able to storm the Trade Centre and kill all but one of the gunmen; Adam subdues the leader, w
Two fundamentalist Islamic clerics are murdered by the "Sons of Phinehas", a radical Christian group led by Steven Paynton, who runs a homeless charity where he recruits his group members. Adam goes undercover as a prospective investor to uncover the identities of his "soldiers". Wes runs away, trying to get to Adam who he thinks is abroad on a work trip. This causes Adam to have a panic attack at a crucial point in the operation: Mossad, who have interests in Paynton's operation, has sent a kil
MI5 are assigned to protect Niko Grecic, a Serbian war criminal who is testifying against his former commander at the Hague. A former MI6 officer, Richard Dempsey, is believed to be targeting him. Dempsey and Adam are old friends, but while undercover Dempsey let Adam be tortured and it is believed Dempsey has defected. Dempsey contacts Adam and wants his help clearing his name, but Harry orders Jo and Zaf to kill him. Adam and Dempsey are able to prove that Dempsey is not the one trying to kill
When a North Sea tidal surge threatens to flood London, an eco-terror group, Divine Earth take control of the Thames Barrier, rig it with explosives and threaten to blow it unless the government publishes a report, "Aftermath", which states that the government will build in economic and military strength so that Britain and America can control the remaining resources from global warming. Meanwhile, Harry learns that Adam is becoming suicidal and has gone into a complete breakdown during the oper