The Avengers

Following the death of his fiancee Peggy at the hands of heroin smugglers, Dr David Keel vows to track down the killers and avenge his lost love. He is aided in his quest by a mysterious stranger, John Steed.

Steed has infiltrated a gang, led by Mason, which is implicated in Peggy's murder. Steed asks Keel to establish contact with a rival gang, and the doctor discovers that Vance's hitman, Spicer, has been sent to kill Steed.

Steed impersonates Riordan, a forger soon to be released from prison, and gains the trust of gang-leader Hooper. Things seem to be going well until Hooper's second-in-command, known as the Cardinal, announces that Riordan's girlfriend is outside waiting to see him.

Keel receives a 'phone call from one of his patients, and ends up assuming the identity of her missing husband, a scientist engaged in secret research. Shot in the chest, Keel needs a minor operation - but the anaesthetist has tampered with the oxygen.

A young girl, Carmelite Mendoza, has been kidnapped from a Caribbean island, but Steed suspects a political motive. His suspicions are confirmed when Vasco, the Mendoza family retainer, is observed killing the original kidnapper and abducting the girl himself.

Keel, reviving a young woman who has jumped into the Thames, is led to the Radeck State Circus, where the trapeze girl is guarded, her face covered by bandages because of an accident. The 'trapeze girl'proves to be the daughter of a defecting scientist, who will be used to force her father to return home. When Keel discovers this, he and Carol are captured by Zibbo the Clown, who will shoot Carol if the police investigation is not called off.

A man is murdered whilst being interviewed on live television. one-Ten is sure that it is the work of the ruthless assassin Mr Teddy Bear, and he asks Cathy Gale to trap the man - by arranging for him to murder Steed.

At Marseilles airport, Steed and Cathy find the courier they were due to meet dead. His sample of new liquid rocket fuel has been taken. Facing an array of enemy agents, the duo must recover the flask of Propellant 23.

Borb, the president of the Balkan Republic, is visiting London to sign a military deal. His private secretary is killed by a masked wrestler, the Decapod. Steed is assigned to augment the president's bodyguards, but the wrestler continues to kill those close to Borb.

Shareholders in Anderson's, a small-arms manufacturers, are being killed one by one whilst a tycoon plans a take-over. Rifles and other weapons, possibly manufactured by Anderson's, are being smuggled into Africa. Cathy Gale joins the board with a 20 per cent share in order to investigate.

A film star's stand-in is murdered, and microfilm of North American early warning systems has been stolen. The film star, despite an aversion to travelling by sea, proceeds to Montreal on a luxury liner. In an attempt to find the mocrofilm Dr King is assigned as her personal doctor, and Steed goes under cover as a steward.

Steed is trying to infiltrate a group of assassins currently based in the South of France. He robs the leader of some jewellery in order to impress him, then waits for them in the local club. It just so happens that Venus Smith is singing there.

Thanks to the clever briefing of the Lakin brothers a man charged with treason is found not guilty. Mrs Gale believes that Steed is implicated, and contacts the newspapers. Steed threatens her: either withdraw her allegations or pay the consequences. Soon Steed is on trial for Gale's murder.

All the occupants of a rest home, Adelphi Park, are multi-millionaires. And most of them are refusing to see anyone, including Professor Renter who was due to fly to America with Steed to show off his latest invention. His wife is unable or unwilling to help and, curiously, the neighbour, Madden, another millionaire, is missing.

Agent Borowski has been brainwashed by the enemy, but between moments of multiple-personality disorder he tells Steed that three 'doubles' have been created. Steed tracks down one likely replacement to a holiday camp, but then discovers that he, himself, is about to be replaced.

The Director of Operations (Disco) of the Nutshell, a subterranean World War III bunker, tells Steed and Cathy that Big Ben, a file giving details of all their double agents, has been copied. Security cameras point to a young girl, but she is later found dead. Evidence implicates Steed, and Disco orders that he be apprehended.

At the reading of the will of Wrightson, Steed's former batman, the man's family are shocked to discover his estate is worth a fortune. Steed and Cathy set out to find out where a twenty pounds per week draughtsman acquired such a huge amount of money, and whether it was legal.

Michael Dyter, the newly elected MP for South-East Anglia is shot shortly after making his acceptance speech in which he had threatened to expose a major scandal involving the government. Steed knows that the subject of this was the recent theft of a nuclear warhead near London. So was Dyter killed to keep him quiet, and if so, by whom?

Four agents have vanished, looking for each other, in Little Bazeley-by-the-Sea. Steed and Emma go in for the man who went in for the man who.... and meet the odd local landlord, blacksmith and vicar. Are they more than they seem?

Has the late Dr Marlow's proposed radar-jamming system been tested against British defences? If so, the dead scientist seems to be doing it from his grave. And what's the connection with the local hospital's bizarre operations and a train-crazy philanthropist?

A vastly strong, bullet-proof killer homes in on and destroys several electronics executives. Could it have something to do with Dr. Armstrong's automated work place? Or with the activities of a nearby karate school...

When an agent is killed in the lift of Pinter's Department store, Steed and Emma get involved with King Kane, a tycoon who lives in a penthouse above the store. Why is Professor Popple, a missing atomic scientist, being held in the bargain basement?

Why have all the fish vanished from the Scottish coastline? Does it have anything to do with a dead frogman, found stretched as if on a rack? Steed and Emma think so, which is why they're guests of Ian, the 35th Laird of Clan De'ath, and in danger of being caught by the gillies.

A government official, dresssed as one of the Horse-guards, helps in a raid on secret files and is wounded. Recovering, he remembers nothing. Is his crime anything to do with his membership of Ransack, a club for those with high IQs? Emma can join, but Steed may have to cheat....

The strange deaths of several astronomers, left bleached white, pose a problem. Whilst Steed joins the stargazers, Emma chases a bright light, and finds herself in the hot seat.

Four men involved in the production of ceramics suffer nervous breakdowns in everyday situations. All have recently turned down the opportunity to merge with the British Porcelain Company. Steed and Emma investigate the world of fear, with terrifying consequences.

Several notorious criminals have vanished into thin air. A whisper has been received that the escape chain starts in London, but, when agent Paxton follows it, he winds up dead in the Thames with a 300-year-old bullet in him.

The Ministry has been broken into by, it seems, an invisible man. A trail leads via inventor Quilby to the Eastern Drug Company, a front organisation run by Soviet intelligence. Meanwhile, the crack spies Elena and Alexandre Vazin are in town. But nobody has seen anything of Alexandre....

Emma and Steed investigate the mystery of how top secret things are being photographed from the air. Could it have something to do with the groovy world of fashion photography and a parrot called Captain Crusoe?

Is a creature that can walk up walls clawing to death ruthless and powerful men? Does it have anything to do with Professor Poole's invention of boots that let you walk on the ceiling, or with cartoon superhero the Winged Avenger?

Steed's colleague Sean Mortimer comes to see him in a very confused state. He knows there is a traitor in the organization but he has been drugged to put him in an amnesiac state and he can remember little else. Mrs. Peel investigates but she too falls prey to the drug as she and Sean are abducted by bikers. It is down to trainee agent 69, Tara King, to whom Steed is introduced by spymaster 'Mother' to help him save the day.

The sudden deaths of several of Steed's former army colleagues are revealed to be part of an elaborate engine of destruction, devised by a man court-martialled by them all. And now he is playing a deadly game.

Problems of a secret leakage from Cypher HQ and the disappearance of agent Jarret are first handed to rival Department MII2, and then to Mother's group. But why does everybody at Cypher HQ claim never to have seen Jarret and state that the only thing worthy of note that happened yesterday was that it rained?

Ear, nose and throat specialists are sneezing themselves to death, each after receiving a mysterious empty envelope. When Tara is kidnapped, Steed takes great care over his morning mail.

When an agent at the Ministry of Top-Secret Information is murdered, Steed and Tara have little difficulty in locating the man responsible. But when a handwriting test indicates that he is Boris Kartovski, someone Steed thought he had killed in Berlin 5 years before, our heroes find themselves drawn into the dangerous experiments of Dr. Constantine.

Somebody is out to get super-computer George/XR40. He is shot, given false data, attacked with acid, and nearly gets his power supply cut. But until George works properly the name and nature of the culprits cannot be established.