The Avengers

Season Three - Cathy Gale

Brief for Murder

When a murderer is unexpectedly acquitted, Steed and Gale devise a scheme to trap the duo of crooked lawyers who got the man off at their own game, with a key element of the trap being Steed's apparent murder by Mrs. Gale.

The Undertaker

When an associate of Steed's unexpectedly checks into a rest home for millionaires, Steed and Gale investigate and find that the rest home is running a scheme for the millionaires to avoid death taxes.

Man with Two Shadows

Acting on information from a man who has apparently been brainwashed, Steed and Gale uncover a scheme to replace prominent members of the Ministry of Security with doubles who are really foreign agents.

The Nutshell

When a list of double agents is copied by the enemny, Steed and Gale concoct a plan to flush out a traitor in the secret service; but not before Steed is himself arrested as being the traitor.

Death of a Batman

The reading of the will of a cricket associate of Steed's leads to suspicions about how the man amassed his wealth, which leads Steed and Gale on a search that uncovers a currency and stock certificate counterfeiting scheme.

November Fire

The winning candidate in an election is killed after stating that he was going to expose a security scandal, and Steed and Gale investigate to find that the murder was staged by the candidate, who plans to explode a nuclear warhead in Parliament.

The Gilded Cage

Steed and Gale set up a plan to trap and capture a criminal, who has become a millionaire through his criminal activities, by involving Mrs. Gale in the robbery of 1 million Pounds from a secret gold bullion vault.

Second Sight

A blind millionaire is reportedly going to have a cornea transplant from a donor in Switzerland, but Steed and Gale soon discover that this is just a ruse to smuggle two large diamonds into Britain.

The Medicine Man

A Chinese girl is murdered in a Turkish bath, and Steed and Gale investigate to find that an organization of criminals is planning to replace a pharmaceutical company's products for sale in Arab countries with poison-laced copies to damage the reputations of the company and Britain.

The Grandeur That Was Rome

Investigating reports of crop failures and diseased animals around the world, Steed and Gale discover that a left-wing politician with a fixation for the Roman Empire is planning to spread the bubonic plague around the world in a scheme to form a new empire.

The Golden Fleece

Steed and Gale investigate a possible gold smuggling ring operating out of a Chinese restaurant, and find that a group of military officers are running the operation to get money to help former comrades.

Don't Look Behind You

When Mrs. Gale goes to the country on invitation, she encounters an escaped murderer who is out for revenge against her for her role in having him put away years before. [Note: This episode was remade as the Emma Peel episode "The Joker."]

Death a la Carte

Suspecting an assassination attempt on the Emir of an Arab country, Steed and Gale go undercover as part of his hotel's staff; but when the Emir dies of natural causes, it throws off the plans of the assassins for a coupe in their home country tied to the Emir's assassination.

Dressed to Kill

Steed and six other people planning to buy land near an early warning station are invited to an exclusive New Years Eve party and are stranded at an abandoned train station; but Steed, with some assistance from Mrs. Gale, uncover an enemy plan to plant radr jamming equipment near to the early warning site.

The White Elephant

The disappearance of a rate white elephant leads Steed and Gale to discover and stop an ivory smuggling operation.

The Little Wonders

After Steed and Gale find a doll containing a microfilm list of British agents, Steed infiltrates a secret organization of supposed clerics that is really a criminal organization.

The Wringer

While searching for a missing agent, Steed is confronted with evidence that he (Steed) is a traitor and is later subjected to brainwashing by the real traitor; but Mrs. Gale arrives in time to clear Steed.

Mandrake

Looking into the sudden death of an acquaintance, Steed and Gale discover a scheme for murdering wealth, elderly men with arsenic for their inheritance and then having them buried in a cemetary with a high natural arsenic content in the soil.

The Secrets Broker

After the death of another of Steed's acquaintances, he and Gale discover that a wine store is being used as a cover for a scheme to steal secrets from a nearby nuclear research lab.

The Trojan Horse

Steed goes to a racetrack to investigate the recent deaths of politicians and businessmen and, with help from Mrs. Gale, uncovers a racketeering ring that is operating out of the racetrack.

Build a Better Mousetrap

Investigating strange electrical interference near an atomic research station, Steed and Gale discover that some members of a motorcycle gand are involved in the construction of a long range jamming device.

The Outside-In Man

In an ironic twist, Steed is assigned to protect a British national who, years earlier, was involved in starting an anti-British revolution in an Arab country and is now visiting Britain as that country's representative.

The Charmers

When agents from both sides begin turning up dead, Steed and Gale investigate to find that a third party is using a charm school for gentlemen to train its killers. [Note: This episode was remade as the Emma Peel episode "The Correct Way to Kill."]

Concerto

As a goodwill gesture during British-Russian trade talks, a Russian concert pianist is to perform in Britain; but Steed and Gale find that opponents of the talks are trying to discredit the pianist in order to disrupt the talks.

Espirit de Corps

Investigating the killing of a corporal before a firing squad, Steed and Gale discover a plan by a retired brigadier general and h is followers to stage a coup against the British government.

Lobster Quadrille

Investigating the death of an agent in a fishing hut fire, Steed and Gale uncover a drug smiggling ring operated by a man who was though to be dead. [The episode ends with Steed and Gale saying their "farewells" as she goes on extended holiday in the Bahamas.]