Questioning the connection between Jimmy Kilpin, a terrorist group, and the deaths of a judge, a clerk of court and a QC; CI5 puts the pieces together.
Ex-agent Quinn sets out to murder his ex-chiefs; Cowley, Bodie and Doyle race to protect the potential victims.
The agents suspect inside involvement after three murder attempts on an overthrown African leader; guest Charles Dance.
Cowley sends Bodie under cover in a crime mob to set up an assassin protected by diplomatic immunity.
The police think attractive Susan Grant is crying wolf; Cowley is asked to find out who Henry Laughlin is.
Bodie and Doyle infiltrate an organization which is hiring killers; their victims are nobodies; Cowley must find the link.
Shot by a terrorist, Doyle lies close to death, inexplicably drained of his will to live.
Lieutenant Colonel Peter Lawson vanishes from an army hospital; he is in possession of valuable Nato secrets and may have been abducted by the Russians; Bodie and Doyle have got to find him.
A participant in a celebrated robbery offers to turn himself in, if CI5 can guarantee his family's safety.
A small cocaine war with international implications leaves the agents caught between foreign and domestic friends and foes.
A gunman holds a hospital for ransom from a well-armed fortification on the roof of a neighboring building.
Rural police enlist the agents to probe the thefts of art treasures and industrial secrets.
Posing as an Italian terrorist, Bodie unwittingly becomes involved in a faked assassination, which later turns real.
The partners' romantic weekend with their girlfriends turns to horror when escaped criminals take them all hostage.
Two assassins dodge Doyle and Bodie as they hunt a Middle Eastern leader, in Britain to sign a treaty; guest Nickolas Grace.
A raid on the London silver-bullion market causes Cowley to suspect a leak in international security.
Cowley pursues the drug ring who murdered an industrial magnate's son, who was to inform on the traffickers.
Doyle must out-guess an assassin to protect a journalist about to expose a corrupt jet-aircraft manufacturer.
After the son of a South American president is slain, Cowley asks the family to help flush out the killer.
An amnesia victim holds the clue to a terrorist attack on a diplomatic conference, only 24 hours away; guest Ben Cross.
CI5 and Hong Kong police join forces to bust a protection ring shieding terrorists, who are supplying drugs to U.S. soldiers.
Cowley winds up being accused of treachery when he tries to flush out a Soviet double agent working in MI5.
Doyle's protege, an informer, dies after a severe beating, leaving behind only a cryptic message.
The agents keep an eye on a terrorist living in London, who seems reluctant to resume her activities.
Doyle follows Bodie, whose mood swings cause him to challenge a motorcyclist to a death-race; guest Sarah Douglas.
Two nervous crooks, chased by Bodie and Doyle, invade a home and take the residents hostage.
Doyle and Bodie witness Cowley's attempts to sell a lethal nerve gas to a foreign diplomat.
Cowley fears an all-out war when a raid on a gun shop is signalled by an underworld organization's secret code.
Doyle makes advances toward a shy secretary, linked to the bombing of a car belonging to a Middle Eastern leader.
A man who lost his wife and daughter seeks revenge on the medical profession by sniping at hospitals and rigging a bomb.
The agents are suspicious when Eastern Europeans seem all too eager to exchange for a triple agent.
The KGB springs a British agent from a Cambodian prison as part of a plan to lure Cowley to his death.
A sniper kills a cat burglar who was on his way to meet with Cowley, forcing CI5 to retrace his steps.
The agents are lured into death traps bearing the stamp of the CI5's bitterest enemy, a man thought dead.
Cowley fights to save Bodie, set up by MI6 as the fall guy in an espionage case.
Repeated attempts to kill the CI5 agents make a complex, irregular mission even more difficult.
The agents hope a traitorous spy, returning to England for his lover's funeral, will lead them to a still-unknown accomplice.
Cowley refuses to remove his men from a corporate corruption case, even though the death of a suspect is deemed suicide.
CI5 suspects a traitor in its midst after the murders of two possible witnesses against a crimelord.
The agents discover a drop in crime in a neighboring city coincides with a rash of police brutality and misconduct.
The agents learn the intended victim of two bomb attempts has no past beyond 1958, and is followed by the FBI.
Kidnappers seize an Israeli Minister and intend to ransom him to the highest bidder; guest Tony Vogel.
A crusading lawyer accuses CI5 of brutality after one of her clients dies while resisting capture.
Assassins target Doyle as he and Bodie try to recover a top-secret, laser-targeted rifle they were ordered to test.
White-hooded bigots threaten a black lawyer defending tenants in a slum neighborhood.
Cowley is caught in a dilemma when an evangelist (Diana Fairfax) stalked by assassins is also his former love.
After a terrorist fails at several assassination attempts, the agents realize they have been protecting the wrong man.
A CI5 agent dying from plutonium poisoning warns the team about South African terrorists planning to bomb London.
A temptress convinces Doyle to re-open the case of her father, a man Doyle helped put in prison.
A politician's deathbed confession revives long-buried murder and bribery cases, and leads to new killings.
Bodie captures a German terrorist, then must defend him and a group of civilians from the rest of the German gang.
The CI5 kidnaps a crime boss's daughter to stop a band of mercenaries planning to attack a plutonium storehouse.
Witnesses to an assassination face death themselves when a newspaper identifies them; guest Peter Davidson.
The team must identify the intended victim of an assassin testing a high-powered rifle with random murders.
Irish terrorists rob a government armory, then turn up dead, with the stolen weapons nowhere in sight.
The Prime Minister's private telephone number appears on a pad in a slain prostitute's apartment; guest Felicity Dean.
A poisoner kills an executive and secretary of a chemical firm involved in weapons development.