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.

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.

Bodie is out at a restaurant with his girlfriend when a bomb goes off at their table, leaving her critically injured and several other diners dead. It's left to Bodie to find out who targeted him and why - until he realises he wasn't the target after all.

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.

On leave from CI5 with a hand injury, Bodie takes a day trip with his girlfriend and finds himself face-to-face with the leader of a terrorist group. He captures him but then the rest of the gang arrive and trap Bodie and his girlfriend in a nearby vicarage, leaving him unable to alert his colleagues back at CI5 HQ. With barely any clues as to his whereabouts, Doyle and Cowley go on a chase through the countryside to try and locate Bodie.

The daughter of a man inprisoned by Doyle six years ago when he was a Docklands policeman turns up, claiming to have new evidence which will exonerate her father. Doyle reluctantly agrees to reopen the case, but will his budding relationship with the girl cloud his judgement, and make even himself doubt whether he jailed the right man?

Cowley assigns Doyle to test a brand new high-tech laser beam rifle. But the rifle is stolen from his flat and the thief decides to 'test' it on Doyle, sending him on a cat-and-mouse chase around London.

Bodie and Doyle are assigned to protect a foreign official who is on a secret visit to Britain. But already possible enemy assassins appear to know his - and CI5's - every next move.

When a newspaper takes it upon themselves to irresponsibly publish a list of the names of witnesses to an assassination, it is left to CI5 to not only protect these people, but at the same time apprehend the killers before they strike again.

A dying man's confession triggers the re-opening of a twenty-year-old case of police corruption, an investigation in which the main prosecution witness was murdered by the police officers who were supposedly trying to protect her. Somebody then decides to silence these officers, and sets about doing so.

A British traitor returns to his homeland and must be found before his former colleagues, seeking vengeance for his past betrayals, go in search of his whereabouts.

Bodie is re-acquainted with a former girlfriend when she shows up in London, and during a secret meeting with her finds himself framed for an assassination and then ultimately on the run from his own colleagues at CI5.

Bodie and Doyle are undergoing intense training in preparation for an assignment where they are protecting a foreign official...at the same time, two potential killers are receiving similiar training to prepare them for the assassination of the same official.

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.

CI5 become aware that an assassination plot on a group of visiting Greek Royals is being planned using a rifle that has a range of over two miles. But they must find out who is the gunman and what is his target - before it is too late.

A CI5 agent is murdered, leading to the discovery of a man who is dying as a result of plutonium poisoning. This links CI5 to a further plot involving the imminent explosion of an A-bomb at the same bowling alley. It's left to Bodie and Doyle to try and de-activate the fuse before it takes them and the whole of London with it.

A virtual police state has been imposed by a local Chief Constable, resulting in a supposedly almost crime-free city. But that is because all the crime is taking place behind the scenes by the police officers themselves - who will think of nothing of imposing on suspects' rights in their pursuit of 'zero tolerance'. Bodie and Doyle become hunted men when they visit the city and begin to question the rather unorthodox methods of action taken by the local constabulary.

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.

The daughter of a British Government engineer who is working on a defence protect is kidnapped, and the only way she will be safely returned is if he agrees to betray secrets to enemy agents.

Cowley finds himself under suspicion when a former colleague of his is arrested for being a double agent. So just how deeply involved is the CI5 Chief?

Bodie, Doyle and their latest girlfriends are on a quiet weekend in the country when they unwittingly get caught up at a farmhouse siege in which they must try and escape from a group of gun-toting fugitives.

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

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.

An Iron Curtain agent is using a young girl to extort secrets from, and ultimately destroy the career of, a future British Prime Minister, unaware that the girl is the long-lost daughter of a well-known local prostitute.