13 May 2002
Twenty high-explosive devices are smuggled into England. When the first goes off killing a doctor and severely injuring her young daughter, the team scrambles to track down an American anti-abortion activist who sneaked into the country - and may be planning a huge commemoration of her husband's execution back home in just a few days. Things are complicated by CIA insistence that the woman, if found, be extradited back to Florida, where she too will face the death penalty.
20 May 2002
Racial tensions in Britain continue to rise and the team pieces together an organized attempt to stir up problems for political gain. Tom and Helen go undercover to get close to the well-protected head of the conspirators. But as time runs short, personal loyalties will leave one team member dead.
27 May 2002
Zoe is undercover on a routine op, pretending to be a PR agent hoping to land a contract with the Turkish government. She winds up a hostage - along with dozens of others - when a group of Kurds take over the Turkish embassy and demand the release of political prisoners. However, the team pieces together that this is just a cover, as a disgruntled former spook is using kidnapping and terrorism to gain access to a secret bank account - one with millions of pounds... and the personal identities of every undercover officer.
4 June 2002
During riots in advance of US President Bush's visit to London, the MI-5 team observe Peter Salter among the agitators. Salter is a legendary agent and neither Zoe or Danny are quite sure what to do. When they report what they saw to Harry Pearce, he instructs them to remove any reference to Salter from their reports and to forget what they saw. Turns out Harry is running Salter on a special op in cooperation with MI-6. They are trying to nab a well known anarchist who is in the UK to stir up trouble. As the investigation progresses however, Salter's loyalty is called into question. Zoe has another problem when she suspects Tessa of embezzling funds. Tom meanwhile finally has to admit to Ellie what he really does for a living. She doesn't take it all well and she insists that he tell her daughter Maisie the truth or she will leave him.
10 June 2002
A former MP, imprisoned years before in an arms-dealing scandal, claims to have a damaging memoir ready to go to press. The team tries to determine whether its claims are genuine while possibly being subverted by other agencies with other agendas.
17 June 2002
SPOILERS Patrick McCann, the leader of an Irish splinter group walks into a safe house and insists that he has crucial information for MI5 concerning their investigation on an Middle East terrorist group called Asabiyah. To share in-depth information on Asabiyah's plan to hit a British nuclear power station with MI5, McCann requests that his group goes unwatched for 30 hours. Despite doubts about this collaboration, McCann's splinter group is granted their request of not being watched for 30 hours. It then becomes evident, however, that McCann has planned to release a bomb on one of London's stations which can be repelled by MI5 just in time. In the meantime, things get more serious between Ellie and Tom as she and her daughter Maisie move into Tom's house. When Tom brings his laptop to his home, he realizes too late that it is set up with a bomb and Ellie and Maisie are in great danger.
2 June 2003
As Republican nationals make several strikes in London, another bombing at a secret military installation catches the team's eye. Special Branch tracks the entry of a Serbian war criminal while a military convoy is attacked - and the exiles responsible stockpile enough arms to start a small war. While Tom keeps trying to make things right with Ellie, he and the team race to discover their enemy's final target.
9 June 2003
An extremist mullah may be planning England's first suicide bombing. MI5's mole is discovered and tortured, leaving the team in need of someone who can get deep inside the mosque. A former Algerian spy smuggles himself into the UK and offers to help - but his loyalties are questioned by Tom. As the mole gets closer and closer, he falls out of contact with the team, leading to a dramatic showdown in a schoolyard - with one child wearing a bomb.
Season 2, Episode 3: Spiders16 June 2003
Repeated attacks on MI5's computer system threaten the theft of virtually all classified information. Danny is undercover as a journalist for an socialist paper linked to an anarchist group while Zoe takes a turn as a middle school teacher to get close to another instructor who may be spearheading the computer attacks. Moreso than other episodes, though, everything is not as it seems as a long-dead agent and a potential nuclear device at the school play into a web of deceit and confusion that nearly costs MI5 all their secrets.
23 June 2003
Twenty billion in US aid has disappeared from Russia. Meanwhile, MI5 is called in to deal with the theft of a billion dollars from a well known bank - that also handles government accounts. A former KGB officer turned Mafioso is pulling strings in the bank - and possibly in the government - to launder the cash. Danny goes undercover as a commodities trader to find out what the bank and the chancellor's office aren't telling the team. Meanwhile Tom's relationship with the doctor continues to develop, and Zoe gets a pleasant surprise - and then a nasty shock - about her banker beau.
7 July 2003
A routine MI-5 training exercise to handle external calamities turns sinister when the team finds out that the threat is real and that a deadly biochemical weapon may have wiped out the government and most of south London. Amid the chaos, the team has to cope with the situation in the midst of a near total communications blackout.
14 July 2003
The American president's unexpected visit to London forces the MI5 and CIA teams to work together. Harry suspects that there is more to the surprise visit of the American President than the Americans admit to. After some investigations on MI5's part, Harry's instincts are confirmed: the plans of the American President involve a secret meeting between him and the Libyans. After Tom's break-up with Vicky, he is meanwhile facing difficulties from his former girlfriend's revenge plan to hurt Tom.
Season 2, Episode 7: Clean Skin21 July 2003
A French scientist Jerome Durand, has created an air burst EMP missile that when detonated, will shut down all electronic equipment within a square mile. He's now believed to be in London working with a British financier, Frank Hastings, on a possible sale of the new system. The French DGSE send an agent, Jean-Luc Goyon, to work with MI-5 but the British government plans to steal the system before it can be sold to anyone. When Harry Pearce's house is burgled by a gang of professional thieves, they also happen to get away with a briefcase of particularly sensitive information including stolen codes. He's not keen on reporting it so he and Tom set out to get it back. However one of the thieves, 14 year-old JJ, has a photographic memory and knows the information by heart. But perhaps JJ can be of use to them in stealing the missile plans.
28 July 2003
Due to a rail strike, the transportation of a load of nuclear waste has to be done by road. Zoe's task is to make sure that the transportation of nuclear waste reaches its destination safely. MI5 receives evidence that a discontented army officer is planning to lead the armed services in a mutiny. Tom is sent to investigate undercover but is convinced he is wasting his time. When Danny arrives to release Tom from the task, his cover is blown and it becomes clear that Major Curtis has attached explosives to the nuclear waste that is being transported by road.
4 August 2003
The Chala Cartel, a Columbian criminal organization dealing with drugs and weapons, are the focus of MI5 this time. Trying to get into the country, Chala Cartel kill 8 members of custom. In order to get to the core of Chala Cartel, Tom and Zoe start liaising with the leader's girlfriend Mariella.
11 August 2003
Harry finds out that Tom and Christine Dale, a CIA officer, are having a relationship. Tom ignores Harry's demands to end his relationship with Christine. Tom learns that an American assassin has come to Great Britain. This news was not passed on to MI5. Tom doesn't want to compromise Christine, so he is unable to tell Harry what he knows. On Tom's demand Danny and Zoe - without Harry's knowledge - take on the matter but things turn out badly. Tom's strange behavior and the set-up against Tom make him appear suspicious. Zoe and Danny believe that Tom might have gone bad. No one believes him, so Tom has to flee when he is accused of murder and conspiracy.
11 October 2004
After shooting Harry, Tom disappears once again. Evidence clearly speaks against him. Oliver Mace, chairman of Joint Intelligence Committee, seizes the opportunity of the fiasco to take over MI5 and overrule Harry's leadership. An investigation into the entire MI5 office takes place while the entire team is under constant watch. To fill the gap that Tom as a senior officer has left, Adam Carter, an MI6 officer, is recruited by Harry to help out MI5.
18 October 2004
The discovery of a nuclear lab in suburban England prompts Harry to activate a long-quiet sleeper agent, a university professor who must sacrifice, albeit temporarily, his name and maybe even his family to trick terrorists into thinking he's created red mercury, a highly efficient chemical detonator. As the op progresses, Tom begins to doubt the wisdom of shaking the sleeper's life to the ground and tries to get the mission scrubbed.
25 October 2004
An attack on an Islamic dissident author in his friend's bookstore puts MI-5 on the trail of international terror groups. Danny is assigned to protect the bookseller as Adam thinks he may still be a target. MI-6 isn't being of help and to the point of Adam having to stage an elaborate, hours-long shake of many tails in order to meet with a very highly placed source. In the post 9-11 world, no one is off limits, sides change quickly - and the team certainly isn't being told everything.
1 November 2004
When Patricia Norton, the UN's Chief Middle East Peace negotiator vanishes and is presumably kidnapped in the middle of important pre-peace conference negotiations, MI-5 go into action. Norton is well-known to Adam Carter and his wife Fiona who is an MI-6 agent. Adam believes a group known as the November Committee is at the center of the kidnapping as they are out to stop any possible negotiated solution. For Harry Pearce, he also has to worry about his daughter Patricia Townsend, a documentary filmmaker who is now supporting a pro-Palestinian faction. With both Zoe and Danny at the pro-Palestinian Committee, they discover that they are not the only ones there undercover. Zoe's photographer boyfriend, Will North, asks her to marry him.
8 November 2004
Through a series of exigent circumstances, Danny and Zoe are tasked with having to kill a scientist that is on the verge of selling a weaponized version of bubonic plague to North Korea and escaping the country. This is their first time at having so directly a hand in this aspect of their work, will a crisis of conscience allow the scientist to escape?
15 November 2004
Zoe is put on trial for using sex to entrap a suspect.
22 November 2004
A series of cyber-terror attacks on pharmaceutical manufacturing, banks, and even traffic lights are sending Britain into a panic. While the national intelligence coordinator puts on a happy face, MI-5 hunkers down and tries to track those responsible. But it's unclear whether Islamic fundamentalists or simple greed are behind the growing body count, and a ransom demand in diamonds puts a team member at risk.
29 November 2004
When the infant child of a fading but recently knighted rock star is kidnapped from his home, the Government wants MI-5 rather than the police to take charge of the investigation. Harry Pierce isn't very pleased but Oliver Mace let's him know in no uncertain terms that the decision comes from the highest authority. With Adam Carter in charge of the team and keeping the family under nearly constant surveillance, they decide to put someone in undercover to learn what they can. Adam isn't too pleased when he learns that his wife Fiona will come over on loan from MI-6 for the job. Meanwhile, Harry has other issues to deal with when a senior Government minister's sexual escapade goes wrong leaving the woman dead.
6 December 2004
When soldier of fortune Robert Morgan is caught digging up weapons in what was an old Soviet arms stash, he is turned over to MI-5 for questioning. The security agents determine that a sophisticated laser, used for guiding missiles to their target, is missing from the stash and they are convinced there is a terrorist plot underway. Adam is put in charge of interrogating Morgan and with no more than an estimated 48 hours before the attack, Adam finds himself unable to extract any information using conventional methods. Gradually, he begins to use so-called aggressive techniques bringing into question just how far they are prepared to go to get the information they need. Harry Pearce meanwhile has been short-listed for the soon to be vacant MI-5 Director-General position and prepares for his interview.
13 December 2004
After the police raid a house and find evidence that terrorists may be planning an attack in London with Sarin gas, Danny and Fiona Carter, who has now transferred to MI-5 from MI-6, follow up on a lead provided by an informant. It's a trap however and Fiona is soon forced to call husband Adam and under threat of her being killed, is forced to meet one of the terrorists. It's clear that whatever the terrorists are planning, it is related to that day's summit meeting between the British PM and Iraqi and US allies. While Adam tries to find out where Danny and Fiona are being kept, the prisoners are under constant threat with Fiona being threatened with being burned alive for all to see. As the threat increases, one of the two prisoners will not survive.
12 September 2005
As the team buries their dead colleague, a bomb goes off in a nearby market. The group, Shining Dawn, demands the release of their leader Michael Monroe or they will detonate another bomb in 10 hours. The CIA is involved since Shining Dawn has primarily directed its wrath at the US and Monroe is an American citizen. The group believes that mankind is a parasite destroying the Earth with its technology and believe that it will be destroyed unless humans are dramatically culled. Harry Pierce is less than pleased when a colleague, Juliette Shaw, suddenly re-appears and is appointed to help out given Fiona Carter's absence. She makes sure that what she knows about Harry's past will ensure a meaningful role for her. An ambush where a suspect is shot through the head tells Adam they have a mole in their midst. Their problems are compounded when one of the agents is taken prisoner.
13 September 2005
With Zafar Younis being held by the terrorists, Adam Carter had to act quickly to free him but he may have over-stepped when he tries to extract information from one of them. His interrogation confirms his earlier belief that there is a mole leaking information to the group. Harry tells the Home Secretary that he is being blackmailed and therefore submits his resignation. He doesn't mention who is doing the blackmailing, but is up front with the Minister on what he did to compromise himself. Adam is now convinced he knows the mole's identity but accuses the wrong person. MI-5 has an eye witness in Tash, the waitress who bumped one of the terrorists at the train station, and she works with MI-5 to identify the man. Soon however, Tash becomes a target as the mole arranges for some insurance in the event they are captured.
22 September 2005
When 6 local Councillors in East London switch their allegiance to the right-wing British Way party, there is fear of race rioting in the area. MI-5 is called in to determine - and stop - any agents provocateurs that may be instigating activity in the local community. At a party rally William Sampson, a Member of Parliament, announces he will now run as a candidate for the new party. Youthful, handsome and articulate Sampson causes concern in the government and with the newly appointed National Security Coordinator, Juliet Shaw. MI-5 plans on causing dissension in the party between Sampson and Keith Moran, another of the party's leaders. When an Afghan asylum seeker is charged with the murder of a young girl, it provides the party with a perfect issue and a powder keg for MI-5.
29 September 2005
After an agent is killed in Istanbul, MI-5 fears that a known terrorist, Yazdi, is trying to infiltrate the UK to stage an attack. The agent in Istanbul had identified a people smuggling ring and it is apparent that the terrorist intends to use it to enter illegally. The smuggling ring is being run by the Crown Prince of the Gulf state of Bahar who agrees to cooperate with MI-5. Over his wife's objections, Adam goes undercover to use the smuggling route and recruit Yazdi to their side. The operation goes reasonably well and Yazdi is soon in custody but when he reveals to Adam that there is a terrorist cell in London waiting for him to arrive, they realize their work is only beginning. Yazdi eventually gives them the name of his UK contact and the planned target - the Houses of Parliament - but not sufficient detail to actually stop the attack from taking place. All is not as it seems however.
6 October 2005
When a retired senior member of the Security Service, Clive McTaggart, is found dead in his home, it's put down to suicide. The man had been suffering from cancer so suicide is not an unreasonable conclusion. It's not that simple however. McTaggart had written a book and had arranged for journalist Gary Hicks to visit him that day and Hicks actually saw him being killed. He's soon in touch with Ruth Evershed and MI-5 begins an immediate investigation. Without knowing who might be out to stop the publication of McRaggart's book - and realizing it could even be another part of their own organization or another intelligence agency - they play their cards very carefully. The team get unexpected help from an aspiring journalist, Jo Portman. They also happen to be looking for new recruits.
13 October 2005
When MI-5 learn that Nazim Malik, a suspected terrorist who has been held without trial for two years, is planning a terrorist attack, Harry Pierce arranges for him to be released from prison. They have no idea how he could be arranging a terrorist attack but suspect he may have revived the plots for which he was originally detained: bombing Heathrow airport and the Eurotunnel. With Fiona undercover as a sympathetic journalist, they try to get close to Malik but he's proving to be a hard egg to crack. There may be good reason for Malik to act the way he is when MI-5 learn the the French authorities have shot and killed a Nazim Malik in Paris and that the British may have held an innocent man in custody. The Malik in London has been in touch with radicals since his release so MI-5 may have someone who is now out for revenge. It's not that simple however. Jo Portman has completed her training and joins the team.
20 October 2005
Fiona Carter goes undercover when MI-5 receives a report that the Syrian Foreign Minister may be prepared to provide the British with information. She and Jo Portman represent themselves as public relations specialists but Fiona's cover is almost immediately blown when she is recognized by one of the Minister's aides. She tells Jo about her life in Syria and the circumstances under which she met Adam there. The Syrians who've recognized her have their own plans to avenge their family honor. Fiona is well aware that her cover is blown but proceeds anyway without telling anyone of the danger she is putting herself in. She has her own reasons for wanting to meet her pursuer.
27 October 2005
Still in shock and unable to properly grieve, Adam Carter insists that he must return to work and keep himself occupied. Harry Pearce isn't so sure and he has Adam monitoring Hugo Ross who has just been released after serving a 30 year sentence for spying for the Soviet Union. Ross is an old-fashioned communist who genuinely believes in the revolution and is disgusted by what he sees in the modern Russia. Time seems to have passed him by however. The rest of the MI-5 team is focusing on a modern Russian entrepreneur, Oleg Korsakov, who it would seem has made an offer to buy the entirety of the National Health Service and run it on behalf of the government. The Security Service, including National Security Coordinator Juliet Shaw, have their doubts about Korsakov's intentions and in spite of a direct Cabinet order not to interfere, try to get information to prove his malintentions. There is perhaps a role for Hugo Ross to play after all.
3 November 2005
Harry Pearce is suspended from duty when he refuses to let the CIA forcibly extradite - meaning kidnap - a UK citizen who is suspected of being a terrorist. Harry is just fed up with it all and MI-5 has no information that the man, Louis Khurvin, is a danger. They place Khurvin under surveillance and unfortunately he attacks and kills the two MI-5 officers keeping an eye on him. With Harry at home, Juliet Shaw takes over the team and presses them to find Khurvin before he does anything else. The CIA provide evidence that Khurvin attended a terrorist training camp the previous summer, but Adam doubts that it is real. They find a link between Khurvin and an American businessman, Nick Pollard, who has only been living in the UK for 9 months. With the US and Iran on the brink of going to war, it seems that someone is bent on ensuring the UK will support whatever action the US decides to take.
10 November 2005
Harry Pearce and the entire team are taken prisoner by a retired ex-agent, Angela Wells, who believes she has evidence that the British security services killed Princess Diana. Her evidence is a report, dated several months before the Princess' death, from a confidential intelligence committee that outlines in great detail how the murder was to take place. It also reveals that Harry was the committee's Chairman. Wells has a bomb with her and makes it quite plain that she is prepared to die to get to the truth. The agent's look into her story unaware that she has a far larger agenda and a far greater objective in mind.
17 September 2006
Terrorists carry out several devastating attacks on British targets which lead to panic and new extreme legal measures being rushed through Parliament, but is there more to this than meets the eye?
17 September 2006
While Juliet has to come to terms with her injury, MI5 begin to unravel a conspiracy which sees an elite group trying to take control of Britain. They eventually see that this goes much further than anyone expects.
18 September 2006
Intelligence suggests that a thermobaric bomb is being sold to terrorists. Using Zaf as an insider, section D look to intercept the bomb before it does irreparable damage to London, but things don't go exactly to plan.
25 September 2006
During a world conference which could signal the end of poverty in Africa, MI5 uncover two conspiracies which threaten an individual life and world relations. Is anyone using the conference for its intended purpose?
2 October 2006
Ruth is witness to a stranger killing himself in a subway station and is led to a series of clues which will change her world forever.
9 October 2006
The UK government's decision to sell nuclear reactors to Saudi Arabia raises many concerns in the the various services but MI-5's immediate concern is that one of four Saudi Officials arriving in the UK may have a money connection to Al Qaeda. At the same time, they know a group of terrorists have been smuggled into the UK in a shipping container. It is apparent that they want to scuttle the UK-Saudi deal. Ros goes undercover to infiltrate the four visiting Saudis and gets an invitation to a reception at the Saudi Trade Office. The terrorists are one step ahead of them however. Unbeknown to MI-5, they also have a rogue agent in their midst. Adam meanwhile is still having stress reactions that are affecting both his home and professional life.
16 October 2006
A group of terrorists take the occupants of the Saudi-Arabian trade center hostage threatening to kill one person every hour until their demand for the release of certain prisoners within Saudi-Arabia are met. Luckily Ros is already in the building. Will the Saudi-Arabian king give in to the demands?
23 October 2006
Harry Pearce is less than pleased when he learns that MI-5 video surveillance of a suspected terrorist, Khalid Mansour, has been ruled inadmissible and that Mansour will be set free. On the steps of the courthouse moments after being released however, Mansour is shot and killed with the assassin, Daniel Ellis, promptly committing suicide. After a second suicide attack claims the life of a radical Muslim cleric, an anti-Islamic organization known as the Sons of Phineas claim responsibility. Though they have no information on the organization, MI-5 focuses on Steven Paynton, who runs a homeless shelter where both men lived before their attacks. They set up a sting to try and get Paynton to give them information on others he may have recruited to his cause. With racial tensions rising across Britain, Adam goes undercover to rope him in but when his young son disappears, he fears his job may cost him what is left of his family.
30 October 2006
Adam Carter finds himself hunting for a onetime friend, Richard Dempsey, when Harry Pearce orders the man assassinated. Dempsey was once an agent but apparently went over tot he other side during the Bosnian war. He was present when Adam was captured and brutally tortured and since has become an assassin. A top Serb commander Niko Grecic is under MI-5 protection after he turned in the notorious Serb General Marko Tezila and will be testifying against him at the upcoming war crimes trial in Brussels. When they learn that Dempsey is in the UK, they are sure he is there to assassinate Grecic. When Adam finally catches up to him, he has a different story to tell, sending them all off in a completely direction.
13 November 2006
Environmental terrorists take control of the Thames barrier just as a major storm surge threatens to flood the London area. They demand that the British government publish a secret document entitled Aftermath but MI-5 can't find it. It's apparent that the Deputy Prime Minster, the PM is away, knows far more than she is saying. Adam meanwhile continues to struggle with post-traumatic stress syndrome. When he enters the facility to negotiate with the terrorists, he suffers an attack and is unable to function. It's left to Ros to find a way in and convince their captors that they've won and the document will be published.
16 October 2007
The team race to stop a rogue member of Iranian intelligence who may be planning to unleash a bio-weapon in the UK.
16 October 2007
A plague-like virus is unleashed in London. Facing the prospect of half a million dead, Harry orders the team to take extreme measures in an attempt to obtain the antidote from allies who may be keeping it a secret.
23 October 2007
The team investigates a suspicious plane crash near an American airbase in the UK and uncover a link to the mysterious "Copenhagen". Ros's captors subject her to mental torture and reveal some disturbing news about Zaf.
30 October 2007
Abdul Kharami is a suspected terrorist who is under constant surveillance but manages to evade his watchers just as MI-5 receives reliable information that he may be ready to stage an attack. Kharami specializes US targets and given the Americans set them up with the Tehran explosion, Ros for one thinks they should just ignore him. Harry Pearce thinks otherwise and brings his American counterpart, Bob Hogan, up to date. He also authorizes the launch of Operation Zebra, MI-5's plan to infiltrate the CIA. When Kharami's plan is traced to the Iranian Special Consul, Adam uses his special contact there to find out what is going on but it goes horribly wrong. As Ros learns from her Yalta contacts, Kharami's intentions - and his target - aren't are as straightforward as MI-5 may have thought.
6 November 2007
On his way to intercept a Russian arms dealer planning to sell nuclear weapons blueprints to Iran, Adam, in self defense, kills a mugger who later turns out to be a journalist. Adam has a last fateful encounter with Ana.
13 November 2007
Adam and Ros board an airplane to identify a courier carrying nuclear weapons technology to Iran. Jo and Malcolm race to prevent the poisoning of London's water supply which Iran has threatened if the courier does not reach his destination.
20 November 2007
Aware that Iran now has full nuclear capability, Harry and Bob convince Bakhshi go on live television to announce that Iran has ended its uranium enrichment program, but armed activists learn the truth and hijack the broadcast.
27 November 2007
Ros's relationship with Yalta is revealed. With limited options, she turns herself in, but convinces Harry that his best option is to send her back out as a double agent.
4 December 2007
With the team on suspension in the aftermath of the Ros Myers affair, a former IRA operative and one time associate of Connie targets section D for extermination.
18 December 2007
War with Iran finally averted, the team learn that a London school will be the target of hardliners resisting the new peace. Simultaneously they discover that their lost colleague, Zaf, was grotesquely tortured and killed by a group of mercenaries. When Jo is snatched by the group, Adam resists calls to stay focused on the school threat; the war has become personal and he must find Jo at all costs.
27 October 2008
MI-5 is having a particularly busy day. They have just exchanged spies with the Russians and welcome the return of Lucas North after 7 years of imprisonment. Harry Pierce's Russian counterpart, Arkady Katchimov hints however that they will soon have another agent in custody leading Connie James to try and call off an operation in Moscow that is literally minutes away from happening. Simultaneously, an Al Qaeda splinter group has kidnapped a soldier, Andy Sullivan, who has just returned from a tour of duty in Afghanistan. They release a video threatening to decapitate him if Remembrance Sunday ceremonies aren't canceled. MI-5 learn from the information gathered in Moscow that Al Qaeda is planning a much bigger attack in London.
27 October 2008
Convinced that his Russian counterpart in London, Arkady Katchimov, is behind the Al Qaeda bombing that killed Adam Carter, Harry Pearce launches an unauthorized investigation. Their task is to find a non-diplomatic source who would provide then with information on Katchimov's activities. Meanwhile, listeners capture an electronic burst leading them to believe there may be an unidentified Russian submarine in British waters. With Ros Myers now the head of the team, they focus on Alexander Beletsky, a Russian who has a relationship with Katchimov. They conclude that the Russians may be looking to tap undersea communications cables and launch a denial of service attack, thereby disabling the Internet throughout Britain. Lucas North is keen to get back to work but Harry insists that Lucas go through the entire re-integration process before he does so. A good decision given that it appears that North may in fact be working for the Russians.
28 October 2008
When a Pakistani agent informs them that there is an Al Qaeda cell planning an attack in London, MI-5 go into action. They already have an agent in place in the terrorist cell which is led by Nadif Abdelrashid. When what is supposed to be dry run turns out to be the real thing, MI-5 track four bombers as they walk through the city to what is their final destination. One by one, MI-5 try to take each of them down before the bombs explode but they aren't entirely successful. Lucas North meanwhile has a flashback to being tortured by his Russian jailers and recalls one of the interrogators asking about an operation known as Sugar Horse. For Harry Pearce alarms bells go off as the operation was one of the most guarded secrets and known only to a very few. He is convinced there is a Russian mole in the senior levels of the intelligence community and turns to Bernard Qualtrough, a retired spy catcher, to help him ferret out the turncoat.
3 November 2008
MI-5 is approached by Mohammed Khordad, the number 3 man in Al Qaeda, for a meeting. Under normal circumstances, they wouldn't even think of meeting the leader of a terrorist group but Harry Pearce is convinced that they should look at any opportunity to reduce the threat of attacks. Khordad is keeping his cards close to his chest and insists that they have to trust one another before they can deal. He tells Harry that a bomb will go off at 3 pm that afternoon unless the Home Secretary publicly absolves two suspected terrorists of any wrongdoing. If he can do that, he will then have more important information for him. As the MI-5 team try find the location of the bomb and Harry tries to convince the Home Secretary of the necessity of making a statement, they also have to deal with another problem: the CIA, which also has a interest in Khordad.
10 November 2008
MI-5 try to stop a ruthless City financier who is out to force the collapse of a major bank. Manipulating the market is Alexis Maynell's specialty. Ros Myers goes undercover to seek evidence that Meynell is spreading the rumors that the bank in question, Highland Life, is about to go under. The Minister is prepared to freeze Meynell's assets, but only if MI-5 can find concrete evidence that he is involved in insider trading and market manipulation. Ros' life is in danger however when her cover is blown. Connie James finds herself frozen out and under suspicion as Harry continues to investigate the leak around the Sugar Horse network. Harry realizes he may have made a very serious error. Jo Portman's flashbacks are beginning to affect her work.
17 November 2008
With the military situation in the Middle East rapidly deteriorating and a UN Special Envoy about to hold crisis talks in London, MI-5 come across a teenager selling a highly sophisticated - and classified - electronic disruptor. It turns out the young man saw it being used in the assassination of a photo-journalist and managed to steal it when the assassin was struck by a car. They identify the assassin as one Michael Sands, a former MI-6 agent who had disappeared on an operation two tears ago and who, they assume, has now gone native. As Lucas North babysits the young thief and his mother, the rogue MI-6 agents try to recover something other than the weapon itself. Harry meanwhile receives a coded message from a sleeper agent in Russia indicating that Sugar Horse has been compromised and that she is coming to England. What he doesn't realize is that someone is also trying to frame him.
24 November 2008
Sugar Horse is revealed to be a network of sleeper agents in Russia. They are there for use only in the direst of circumstances. Just as the West's relations are on the brink - there is much sabre-rattling when the US announces its plans to install its missile shield in former Eastern European countries - two Sugar Horse agents are apparently murdered. All of the evidence points to Harry Pearce who is arrested and is forced to undergo severe questioning. Lucas North travels to Moscow to see what he can learn. A member of the MI-5 team is revealed as a Russian mole and is now desperate to be extracted after killing another member of the team.
8 December 2008
With the Russian mole inside MI-5 now in custody, the team tries to decipher the information Lucas North obtained in Moscow. It is apparent that the Russian intelligence service had their own equivalent to the British Sugar Horse network and have sleeper agents across Britain and throughout the various security agencies. Information from the mole indicates that a thermonuclear device will be exploded in central London and offers to reveal the identity of all sleeper agents in the UK if they agree to provide protection and a relocation package. The Russians have issued instructions to kill Harry Pearce and all of the members of Section D so getting to the mole's information will be difficult. Harry decides to meet his Russian counterpart to ensure he knows that they will all die if they don't work together to stop the bombing.
4 November 2009
A kidnapped Harry Pearce is kept prisoner in an abandoned warehouse without really knowing what his captors want. When men try to kidnap Ruth, now married and with a stepson, she goes straight to MI-5 to find out what is going on. There she reveals a secret only she and knew: the location of a stash of weapons grade uranium that was headed to Baghdad justify American claims of WMDs and the invasion of Iraq. Lucas North asks for help from newly arrived CIA agent Sarah Caulfield in finding the American links to the plot. When Ruth's stepson is threatened, Malcolm puts his life on the line to save him.
6 November 2009
When an industrial accident put a liquid natural gas plant out of commission for six months, the UK must quickly arrange for an alternate source of supply or face an energy crisis that will cripple British industry and the economy, to say nothing of its citizens' quality of life. The government is reluctant to deal with the Russians who will inevitably attach other demands to any sale, let alone give them a good price. Their only choice is to deal with Tazbekistan, a country that has recently undergone a change of government through a coup and is known for its abuse of civil rights and the use of torture on its dissidents. MI-5 is tasked to gather whatever intelligence it can about their negotiators and to also ensure that they and the Russians not seek revenge on each other in something that is akin to a blood feud. In the midst of all this the CIA, in the form Lucas North's lover Sarah Caulfield, tell MI-5 the US doesn't want the UK to make a deal with the Tazbeks and seem to be prepared to manipulate the situation to their advantage. Meanwhile, the Home Secretary tells Harry of information he has received in confidence from an American contact about a secret meeting in Switzerland that may have global repercussions.
13 November 2009
MI-5 is called into action when a terrorist group takes control of a group of very rich entrepreneurs who are meeting secretly in London. The Security Service hadn't anticipated any difficulty as they had no intelligence indicating the meeting was at risk. As luck would have it, Ros Myers is on site planting a bug and so MI-5 already has an agent on the inside. The terrorists put the capitalists on trial, streaming the proceedings over the Internet and asking viewers to vote on whether they should be executed or not. The CIA want the UK government to launch an attack and even threaten to do so themselves, but Harry sees it as a sure way to get everyone killed. The Home Secretary decides it's the only way out and orders the attack. Lucas North meanwhile is trying to get information on the terrorists' leader in the hope of proving he is a phony. Separately, Jo Portman approaches Ruth Evershed suggesting she speak to Harry Pearce and rejoin the team.
20 November 2009
The MI-5 team is still recovering from the loss of one of their own. In reviewing CCTV coverage of a riot at an immigration detention facility, Lucas North recognizes the one man who managed to escape: Oleg Darshavin, his Russian interrogator and torturer during his eight years of imprisonment. When they meet again, Darshavin offers to tell Lucas of an impending terrorist attack on the UK in return for a UK passport and money. Darshavin isn't being entirely truthful, however. Harry tells his CIA counterpart about the rumored secret Swiss meetings on a new world order and they agree to cooperate. The American, agent Sarah Caulfield's superior, learns of her affair with Lucas North and he encourages her to continue the relationship as he suspects Lucas is a double agent. He learns that Sarah has her own agenda.
27 November 2009
Everyone is shocked to learn of CIA agent Samuel Walker's death. It's been labeled a suicide but he had made appointment less than an hour before to see Harry Pearce as he had information on the secret meeting of rogue Western agents and Chinese spies in Bern. Soon after Walker's death, another American is killed and then a British agent. As they try to sort out the connection between the murders, Ros Myers is contacted by her one-time mentor, Jack Coleville, the man who recruited her. He's now retired and asks her to read his memoirs but she soon realizes that that she is being duped. As they desperately try to find Coleville and stop him from continuing his revenge driven campaign, Sarah Caulfield sees the perfect opportunity to cover up her own activities.
4 December 2009
MI-5 is desperate to find Ryan Baisley, a banker with Dewitts Bank who had agreed to provide MI-5 and CIA with a list of names and accounts from what the security services describe as the dirtiest bank in the world. They have Baisley in a safe house but a hit squad descends on the place killing everyone except Baisley who managed to escaped. Baisley may have also been trying to squeeze money out of the bank, leading to the hit. The Home Secretary advises Harry that it's absolutely necessary to get the information Baisley had promised within 24 hours - if the government isn't able to seize Dewitt's estimated £1.5 billion in assets, the UK will be unable to meet a major debt payment that comes due the next day. Soon however, it becomes apparent that the Home Secretary has been set up to be discredited. As MI-5 gets more information about the bank, they find a connection to the mysterious meeting in Basel, code named Nightingale, and Sarah Caulfield's connection to the group.
11 December 2009
When a Pakistani intelligence officer is stabbed in London, Harry Pierce and Ros Meyers are told by the senior intelligence officer at the Pakistani High Commission that at virtual war is brewing between the Indian and Pakistani communities in London. They believe the leader of the planned attacks is Harish Dhillon, an Indian whose younger sister was severely beaten and is still in hospital on life support. With Sarah Caulfield having vanished, Lucas North finds a USB stick hidden in her flat. When they manage to hack into it, they find a connection between Sarah and Dhillon's controller, Victor Chatterjee and all seems to be part of the clandestine Operation Nightingale run by rogue intelligence officers.
23 December 2009
When Pakistan seizes an Indian submarine that has strayed into its territorial waters, the world is on the brink of a war between two nuclear powers. The Prime Minister invites both parties to London for talks to calm everyone and avert a crisis but there are those who would seek to ensure the talks fail. Sarah Caulfield is a member of the conspiracy, known as Nightingale, and they are bent on starting a nuclear war. When a friendly Chinese diplomat tries to give them information about a possible attack on the peace talks, he is assassinated. MI-5 is convinced that they will cause an incident at the peace conference to push India or Pakistan over the edge.
20 September 2010
Lucas goes undercover aboard a merchant ship on which a known member of Al Qaeda is traveling to the UK. The ship is soon taken over by terrorists and it becomes clear that they are planning a coordinated attack of some sort. Lucas isn't the only MI-5 agent on board but Lucas' main help in the operation comes from a private security officer, Beth Bailey. Back in London, Harry Pierce has a particularly difficult encounter with the former Home Secretary, Nicholas Blake. Harry decides that it's time to retire but is again faced with making life and death decisions.
27 September 2010
When MI-5 learns that Nigerian assassins are out to kill British oil man Robert Westhouse, they send in a team to protect him. Westhouse owns a large piece of Nigerian oil production which is vital to the British economy. Beth Bailey attends a meeting at his offices with a group of others but on the way up in the lift, the car stops and gunmen open fire in an attempt to kill everyone inside. Beth survives as does Dubai-based business man Jacob Chapman. Harry and Lucas assume one of the men in the car was the assassin but it's not quite as simple as that. Meanwhile, Lucas delves into the briefcase of material he was given by a former acquaintance and visits someone from his past life. It turns out that Lucas isn't the only MI-5 officer with secrets from their past however.
4 October 2010
The Home Secretary orders Harry to support a Russian plan to stop the Azakstan Freedom Front from obtaining a deadly biological weapon that was supposed to have been destroyed in the 1960s. The AFF supports independence from Russia and Lucas North works with the Russian security service, the FSB, in stopping them, though he doesn't necessarily agree with their shoot first approach to dealing with terrorists. One of the terrorists, Azis Aibek, manages to escape and make his way to London to see if he can get the British sample of the WMD. In an unprecedented move, the Home Secretary orders Harry to let and FSB officer onto the grid as they hunt Aibek down. Lucas meanwhile contacts Maya and promises to tell her why he never contacted her.
11 October 2010
MI-5 is on alert when a report from the UK Border Agency reveals that a highly sophisticated Chinese hit team has entered the country. The CIA station chief says they know of no reason why the team might be in the UK and MI-5 determines that their interest is likely a British-designed water desalination system. Beth has been working on turning a Chinese Embassy employee but her rushed effort leads to failure, at least initially. Ruth Evershed goes into the company undercover only to find that the CIA is involved and protecting the scientist who developed the new desalination process. When the Chinese station chief threaten to set off a bomb n central London, Harry must decide whether to let them have the scientist or face down their threat. Lucas meanwhile struggles to keep his past a secret.
18 October 2010
London is to host secret Middle East peace talks chaired by the President of the United States. The chief Israeli negotiator is Levi Cohen who is accompanied by his estranged daughter Anna. They have not spoken for many years dating back to when Levi refused to negotiate with terrorists who had taken her captive. MI-5 is in charge of security for the talks, which have been assigned the code name "Horizon". Dimitri and Beth go in masquerading as Home Office employees, but their ruse doesn't last long. When a journalist gets hold of the story, MI-5 wants to know who her source is. They focus on Muatt Hutri, a Lebanese terrorist who has just arrived in London. It's not at all straightforward as it seems however. Meanwhile, Vaughn Edwards is increasing pressure on Lucas to get him a copy of the Albany file.
25 October 2010
The CIA provides MI-5 with what is supposed to be a hacker-proof computer system, Cybershell, but Tariq realizes that the Grid has been hacked into already. They are being watched and the hackers have access to everything. Once connected to the American system, the hackers will have access to that information as well. Lucas is supposed to collect the American crypto-officer and deliver her to Thames House but he receives a final warning from Vaughn Edwards to deliver the Albany file or Maya will fall victim to him. Lucas turns to a former colleague, Malcolm Wynn-Jones, who he believes knows how to retrieve Albany. Back at Thames House, Harry and the others are trapped when the hackers lock them in and shut down the power.
1 November 2010
Lucas North's secret past is revealed as Vaughan raises the stakes in his efforts to get the "Albany" file. Ruth's life is in danger when she follows up a council worker's report of a "dead drop" in a park.
8 November 2010
Lucas is on the run and has taken Ruth prisoner. He gives Harry a simple choice: the Albany file for Ruth's life. Harry is determined not to let Ruth down again and decides to make the swap in the hopes that they can subsequently stop Lucas before he delivers the file to the purchasers. Harry approaches an ex-MI5 Internal Affairs officer, Alec White, to help them track Lucas. The nature of the super-secret Albany file is revealed as are the final pieces of Lucas' background. Not everyone will survive and for those who remain, the future is decidedly unclear.
18 September 2011
Harry Pearce finds himself in front of a tribunal over his willingness to trade the Albany file to save Ruth Evershed but he is temporarily reinstated at the request of the Home Secretary. Erin Watts had replaced him while he was on 8 weeks of enforced leave and he is pleased to hear she is to stay on as Section Chief. On his return he learns that a one-time agent, codename Sharecropper, had been trying to get in touch with him. Unfortunately, he was murdered just 72 hours before his return. Elena Gavrik, codename Tourmaline, is the wife of a Russian minister and was one of their best sources of information during the cold war. Harry thinks Sharecropper was trying to tell him that Gavrik is in danger of being exposed. For Harry however, Tourmaline is more than just another ex-agent.
25 September 2011
Calum Reed is attacked outside Thames House and a laptop containing the information of A Grade MI5 Assets is stolen. A threat is made to release the details of the agents, one of which includes Martha Forde (Lydia Leonard) who has connections to Russian Minister Ilya Gavrik, meaning the Russian/UK partnership is also at risk. In a race against time, the team must recover the laptop before any of the assets identities are revealed. Meanwhile, Harry meets Elena at the Opera House to discuss who has been posing as him, as his relationship with Ruth becomes more frail. And Tariq finds a crucial piece of information about who stole the MI5 Laptop, but can he contact Harry and get back to Thames House in time?
2 October 2011
Dimitri takes part in a Honey trap operation when known anarchist, Johnny Grier enters the country. Dimitri is tasked to honey trap Johnny's sister but the operation takes a turn with a twist of bluffs and lies as Johnny begins to suspect him which could end in tragedy. Meanwhile Elena reveals to Sasha why she betrayed her country and later meets Ruth to exchange information regarding Harry's impersonator. And Home Secretary William Towers has a job offer for Ruth but she is torn between her feelings for Harry.
9 October 2011
Section D are facing a suicide bomb threat, when two prisoners are released. Having been trained for martyrdom in prison, one of the released convicts, Ashur Mohali is an MI5 asset, who's been made a promise that if he had spent two years in prison gathering information to help stop a terrorist attack, he and his daughter will be given UK citizenship. While the team try to prevent the attack and keep Ashur onside, Harry and Ruth make a decision to gather evidence against CIA Deputy Director Jim Coaver, now suspected of impersonating Harry and pursuing information from Elena Gavrik. Things takes a turn for the worst when Elena is attacked, and revelations lead Ruth to believe that it is indeed Coaver that is responsible for the attacks on the Gavrik's and MI5. Meanwhile, Erin has to make an impossible decision when the teams operation causes her to be compromised when her own daughter is put in danger. Ruth informs Harry of her offer from the Home Secretary, not wanting her involved in what's coming, he asks her to leave Section D.
16 October 2011
Harry takes action against Jim Coaver and mounts an operation to bring him in and interrogate him over the attacks on the Gavrik's and MI5. Jim defends his actions explaining that his part in meeting with a CIA asset who then attacked Elena, was nothing to do with jeopardizing the partnership between the UK and Russia. Meanwhile Ruth is torn when the Home Secretary is informed that Coaver is missing, and is asked to give up his location. Coaver is taken by CIA operatives only to be tricked, when a team of mercenaries snatches him. Coaver, with his last words warns Harry to retrieve a laptop from the American Embassy as it will reveal who is behind the attacks. Harry then meets with Elena to discuss whether or not Ilya could be involved in the attacks and the two share an intense moment. Ruth again becomes torn when Harry enlists her help into getting Coaver's laptop out of the Embassy and back to him but Sasha Gavrik has other ideas. Harry is then pursued by the CIA, who plan to extradite him to the US to ask him questions on Jim Coaver's death.
23 October 2011
In the last ever episode, Harry is being extradited from the UK to be asked questions over CIA Deputy Director, Jim Coavers death. Elena Gavrik approaches Ruth at the signing of the Russian/UK partnership and reveals she has information but must only speak to Harry. The team are then forced to break Harry out of custody, taking Elena to a bunker to be interrogated. Elena then reveals the details of all the attacks on her husband and MI5, as well as truths about who was behind them shocking Harry and Ruth. She also insists there is an attack that very day, a threat with a bomb on a plane heading into London from Moscow. But is Elena to be trusted? As Erin, Dimitri and Calum race against time to find out who is behind the attack, Elena reveals some uncomfortable truths and lies to Harry. Ruth begins to question Elena's true motives and Harry takes drastic action when faced with a choice. Is the plane going to crash or does Elena want to force the UK to shoot it down starting conflict between Russia and the UK. As Harry finds out the truth, its down to the Home Secretary to make the decision on whether or not to shoot the plane down. On the edge, Harry is also forced to make the greatest personal sacrifice he has ever known.
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