第 5 季 共 10 集
播出时间:2006年9月18日
第 1 集 Gas and Oil (Part 1)
播出时间:2006年9月18日
The government introduces draconian emergency measures in response to a series of terrorist attacks. MI5 fear that influential establishment figures are behind the attacks and may be planning a coup.
第 2 集 Gas and Oil (Part 2)
播出时间:2006年9月18日
MI5 has foiled an attempt to murder the Home Secretary, but the plotters use the new emergency powers to imprison Harry. The team must try to frustrate the coup before Harry is executed.
第 3 集 The Cell
播出时间:2006年9月19日
Zaf goes deep undercover to infiltrate an Al Qaeda cell that is planning an attack on the UK. When Adam learns that the terrorists are on a suicide mission he tries to prevent them from reaching their target, but events soon spiral out of control.
第 4 集 World Trade
播出时间:2006年9月26日
Posted undercover at the World Trade Summit for Africa, the team discovers an assassination plot. Initially determined to put their lives on the line to prevent the murder, they are faced with a moral dilemma on discovering the motivate behind the plot.
第 5 集 The Message
播出时间:2006年10月3日
The government publishes its report on the investigation into death of seven terrorist suspects in a fire at a prison. Harry suspects a cover up, then discovers that one of his team has been implicated.
第 6 集 Hostage Takers (Part 1)
播出时间:2006年10月10日
Adam and Zaf try to find a group of terrorists who have infiltrated Britain. Ros oversees a visit by a delegation of Saudi princes offering a guaranteed oil supply in exchange for nuclear expertise, but the Saudi Trade Centre is attacked by terrorists.
第 7 集 Hostage Takers (Part 2)
播出时间:2006年10月17日
The terrorists start to execute hostages in pursuit of their demand for the release of Al Qaeda prisoners held in Saudi Arabia, but suspicion arises as to the true identity of the terrorists.
第 8 集 Agenda
播出时间:2006年10月24日
MI5 investigate the assassination of a Muslim cleric outside the high court, and uncover a radicalised Christian who is determined to incite a religious war.
第 9 集 The Criminal
播出时间:2006年10月31日
MI-5 is put in charge of protecting Niko Grecic, the former right-hand of Tezlia, a Serbian who is put on trial for war crimes.<br />
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They know that Richard Dempsey, a former MI-6 agent who turned on them, is looking for Grecic to kill him before he can testify. Adam, Jo and Zafar must protect Grecic at all costs.
第 10 集 Aftermath
播出时间:2006年11月14日
An environmental terrorist group is threatening to flood London if the government does not make a secret document public.