Agents pursue a courier carrying a special delivery for a mysterious Russian base.
A double agent is discovered within the Canadian Secret Service.
The Avengers face graduates of a Russian school of subversion and martial arts who have established a secret training school for terrorists.
The Avengers discover the ruthless agent they are seeking is actually a computer-controlled security building.
While Steed and Purdey are trapped at an isolated house, Gambit manages to obtain a map from one of the Russian soldiers.
Kidnappers demand money and state secrets in return for Purdy.
A Chinese crimelord seeks revenge when the Avengers intercept a drug shipment intended for a European syndicate.
Purdy's old flame has a grudge against a visiting diplomat and the expertise to do something about it.
When the Avengers capture the head of a European crime syndicate, his gang kidnaps a member of the French royal family for a trade.
A department chief poses as various informers and sells useless information to the agency. With Patrick Macnee, Joanna Lumley, Gareth Hunt.
Steed falls prey to a secret organization which is eliminating key Ministry officials by what appear to be natural causes.
A former friend and fellow agent seeks revenge against Steed, 10 years after Steed was forced to shoot the man for defecting.
A large rat appears to be the cause of a number of deaths in the London sewers.
Steed must discover the significance of film found in a dead agent's hand.
Three people use their photographic memories to transport pieces of a top-secret document.
A gang plans to use a new sleeping gas to rob London banks.
A tramp kills and trades places with a secret service agent and then uses the services of a plastic surgeon to replace Ministry officials.
The team trails a man released from prison after serving time for robbery.
A former acrobat regains his memory and recalls setting a trap for a double agent.
Vacationing agents die after attending the very training center where Purdy is.
Prominent government officials are killed in diverse accidents with one thing in common: All were caused by birds.
A disgraced spy informs Steed of a fiendish technique that allows terrorists to kill with a touch.
A criminal seeks revenge on Steed for crippling him.
A deep-seated hypnotic command turns ordinary people into assassins.
A scientist with the ability to resuscitate frozen bodies is kidnapped by Nazis hoping to revive Hitler's frozen corpse.