CI5 and their agents find themselves under attack from a vendetta of bombings and assassination attempts. Bodie and Doyle are on a chase to find out who the perpetrators are before they end up as the next victims.

It's just another routine house break-in for a cat burglar, until he accidentally uncovers a complex drugs smuggling operation. When CI5 step in, they realise it's not just the burglar's life that is now in danger.

Cowley is offered the name of a highly-placed double agent from an old colleague - who in return wants to be guaranteed protection with CI5. This leads to the start of a dangerous stand-off between the two, using Bodie and Doyle as the pawns.

A spy is extradited to Britain with an attempt to keep his arrival top-secret. However, the Bulgarians from Batak's homeland who sent him appear to be trying to make his movements as public as possible. When he is eventually murdered, CI5 suspect his music student daughter of poisoning him.

Years after a man's wife died and his child left brain-damaged following a series of blunders at the hospital they were treated at, he returns to finally seek revenge by systematically assassinating each of the same hospital's medical staff one-by-one.

A dummy run that has been staged for the visit of a Middle Eastern official is found to have been recorded by a foreign student, subsequently leading CI5 to suspect a security leak.

An attempt to start up a street war is launched by a gangland breakaway opposition group, but their leader appears to have an ulterior motive in his actions.

Bodie and Doyle are shocked to discover that Cowley appears to be selling nerve gas to a group of East Germans in order to line his own pockets, and are assigned by his rival Plumb to track their boss's every move.

A post-operative ward in a hospital is held to ransom by a newly-released convict who plans to make a fortune, setting up his own foxhole at the top of a nearby building. CI5 hatch a plot to bring him down before he takes a fatal shot at the hospital.

A department in a British Government appears to be attempting to kill a bunch of drug-dealing students...but why?

A leader of a criminal gang offers to surrender himself if in exchange he is guaranteed protection for his family.

Whilst investigating a bombing plot Doyle is shot and left for dead in his flat, and as the hospital fights to save his life, he seems unable to decide whether he wants to live or die...meanwhile, Bodie goes on a chase to find Doyle's assailant.

An organisation which hires killers to assassinate virtual nobodies on sight is infiltrated by Bodie and Doyle, who must find out who the perpetrators are and why, by going undercover and posing as potential hitmen themselves.

A young woman contacts the police, saying she is being stalked and is in fear for her life, but they think she is making the whole story up.

A sacked former African Head attempts to get reinstated in office using the help of the British Government, but the plan is sidetracked by one particular civil servant who now wants him dead.

A former colleague of Cowley's who is now a patient in a mental hospital reappears in London, going on the run when he believes that the KGB have drugged him.

A young woman from a rich and successful family turns terrorist, shunning her wealthy background and the British Justice system which she now views as being corrupt. Important legal establishments located around London are targeted by the terrorist groups, who are planting several bombs at key points around the city.

A drug addict is murdered by a pusher who then hastily discards the gun, only for it to be found by a young boy-who then accidently shoots his friend in the process. The pusher then goes in search of the boy in an attempt to retrieve the gun and at the same time has to try to avoid his own people who are in pursuit of him.

Annie Irving, an extreme left-wing preacher - and former flame of Cowley's - becomes the target of a hitman when one of her meetings comes to London. Cowley assigns Bodie and Doyle to protect her, unaware that the would-be hitman is right under his nose.

Bodie's mental state is called ino question when he becomes obsessed with a local Hell's Angel motorcycle gang, gradually sending him further and further behind in training. Is he cracking up?

Lieutenant Colonel Peter Lawson has gone missing without trace...and is armed with vital military secrets from NATO. Can CI5 seek him out before he tells all?

A team of Hong Kong police join CI5 in London to help crack a local heroin supply and protection racket. It's down to Bodie and Doyle to expose a scheme to smuggle drugs to the US by teams of Triads and European agents.

CI5 move in to protect the daughter of a South American President after his son - and her brother - is assassinated on the field of a polo match.

Silver bullion is being shipped into Britain via the Iron Curtain, only for it to be hijacked by one of the group's own officials.

Various industrial secrets and highly-valuable arts treasures are being stolen and sold on by a gang who are using the blind routine of Customs to their full advantage. CI5 devise a trap to stop the thieves in their tracks.