28/09/1963      Brief for Murder (Mrs. Cathy Gale)

An informant who is believed to be guilty of treason is instead acquitted; later on, he and Steed are seen celebrating the outcome at a pub. Mrs. Gale publicly confronts them and voices her doubts about the outcome, and so Steed plots her murder. When Mrs. Gale is murdered in front of witnesses, Steed is the prime suspect - but he too is later acquitted. Meanwhile, Mrs. Gale is very much alive, as this is all a plan by her and Steed, so that they can go undercover to investigate two lawyers, Miles and Jasper Lakin, who guarantee acquittal for criminals by arranging the crime and then manipulating the evidence…

05/10/1963      The Undertakers (Mrs. Cathy Gale)

Several undertakers arrive with a coffin to take away a businessman - while he is still very much alive. Steed searches for the man he was to escort to New York, but instead finds him locked away in an exclusive retirement home, and when the man's neighbour is also brought to the home under strange circumstances, Mrs. Gale takes a job there in order to investigate. She and Steed uncover a scheme to enable the families of millionaires to evade death taxes: when a rich relative dies, they arrange to have the money transferred to the surviving spouse, and then replace the deceased with a double, who will then represent that person for the legally required waiting period of five years. But these millionaires may not be dying of natural causes, and what happens to the double when the five years are up…?

12/10/1963      Man with Two Shadows (Mrs. Cathy Gale)

While interrogating a man named Borowski, an agent given split personalities by a foreign power, Steed and his superior, Charles, discover that someone is creating perfect doubles of key people, such as a nuclear physicist and a several top agents - and Steed may be one of them. Steed and Mrs. Gale arrive at a holiday camp to investigate Gordon, the first man to be replaced. But Mrs. Gale fears that Steed may have already been replaced, and if so, she has order to kill his doppelganger; but is he really the double after all...?

19/10/1963      The Nutshell (Mrs. Cathy Gale)

A thief breaks into a top-secret facility known as the Nutshell, a thermonuclear Underground Target Zone Shelter, and steals BIG BEN (Bilateral Infiltration of Great Britain, Europe and North America), a secret microfilm containing information on all the British and American agents working undercover on the other side. Steed and Mrs. Gale are called in to uncover a traitor, but as the investigation proceeds, it becomes apparent that Steed was involved in the break-in, and he is arrested for treason…

26/10/1963      Death of a Batman (Mrs. Cathy Gale)

Wrightson, Steed's former batman, dies, and at the reading of the will he leaves his wife £180,000, despite only having had a £20 a week salary. Steed and Mrs. Gale investigate the man's estate to determine if the money was obtained legally, but evidence eventually points to a banker who is on a mission to bolster the country's high-tech companies, and is buying stocks based on insider information in order to achieve his goal…

02/11/1963      November Five (Mrs. Cathy Gale)

A politician is assassinated immediately after being elected, but an enquiry uncovers nothing. Meanwhile, a five-megaton warhead has been stolen from a government convoy, and Steed believes that the political assassins are going to use it to blackmail the government. With Steed's help, Mrs. Gale runs for the now vacant seat in parliament in order to find out who was responsible for the murder - only to find that the assassinated politician is still alive, and is preparing to detonate the warhead in the middle of London on November 5th - Guy Fawkes Night…

09/11/1963      The Gilded Cage (Mrs. Cathy Gale)

As part of a scheme to capture millionaire criminal mastermind J. P. Spagge, Steed and Cathy plan to steal £3 million in gold from an obscure vault. Steed sets Mrs. Gale up as an employee of Britain's largest gold repository, but when he tempts Spagge with the bait, Mrs. Gale is arrested, tried and convicted for the murder of the millionaire. However, Mrs. Gale learns that her ordeal was a hoax arranged by Spagge's minions as a test; she then arranges the perfect heist, but things do not go according to plan…

16/11/1963      Second Sight (Mrs. Cathy Gale)

An unusual eye graft procedure requires Steed to assist in the transportation of corneas from Switzerland to London. After Mrs. Gale and an eye surgeon become suspicious of the procedure, the surgeon is murdered. The intended recipient of the grafts is a millionaire who has been blind since the war. Steed sends Mrs. Gale undercover as a biochemist to the home of Martin Halvarssen in Switzerland to observe the operation. They discover that the corneas are actually from a live donor, Eva Braun, and when Braun is later found dead, suspicion falls on a member of Halvarssen's team…

23/11/1963      The Medicine Men (Mrs. Cathy Gale)

Cheap imitations of pharmaceutical products produced by a company called Willis-Sopwith begin hitting the European market, appearing only months after the real products are released. When Steed and Mrs. Gale investigate Willis-Sopwith, a mysterious death amongst the staff of the company leads to an avant-garde artist and a plot to use poisoned stomach-powders to kill thousands of people in an obscure oil-laden country in order to stir up anti-British sentiments…

30/11/1963      The Grandeur That Was Rome (Mrs. Cathy Gale)

After strange diseases begin breaking out in various parts of Europe, Asia, and then Britain, Steed and Mrs. Gale are called in to investigate a feedstock supplier. They follow the trail to the headquarters of the World Empire Party, and encounter Sir Bruno Lucer, a mad, self-appointed Caesar. Lucer has concocted an insane scheme to poison the world using a new strain of bubonic plague, while he and his associates are safely inoculated with the antidote. While investigating, Mrs. Gale is captured, and Lucer plans to make her the guinea pig for the first inoculation…

07/12/1963      The Golden Fleece (Mrs. Cathy Gale)

When leaving a Chinese restaurant, Steed ‘accidentally’ claims the wrong coat from and finds a cheque for £5,000 drawn against a Hong Kong bank in one of the pockets. He and Mrs. Gale soon meet Mister Lo, a notorious, elusive gold smuggler, and an opportunity of finally catching him appears when Lo makes a personal visit to London in order to question one of his clients about a missing shipment of gold worth £10,000. The trail leads to a group of military misfits who are using the proceeds from the smuggling operation to support needy ex-servicemen, which poses an ethical dilemma for Steed and Mrs. Gale…

14/12/1963      Don't Look Behind You (Mrs. Cathy Gale)

Mrs. Gale is invited to spend the weekend at the home of Sir Cavalier Resagne, an expert in mediaeval clothing. Once there, she is greeted by a strange girl named Ola, who tells her that Sir Cavalier has gone away for the evening. When Ola is also called away, it soon becomes clear that Mrs. Gale is being watched. Besieged by bizarre incidents and harrowing experiences, Mrs. Gale eventually discovers that an old enemy is behind the disturbing activity; the man believes her to have broken his heart, and now he is stalking her with murderous intentions...

21/12/1963      Death A La Carte (Mrs. Cathy Gale)

Emir Abdulla Akaba arrives in London for his annual medical examination by Doctor Spender. Steed is expecting an assassination attempt, and so he and Mrs. Gale go undercover at the hotel where the Emir is staying. Mrs. Gale is employed as the Emir's social planner, while Steed poses as a chef and eventually discovers that poisoned mushrooms may be part of the plot. When the Emir dies of natural causes before the villains can hatch their plot, Steed and Mrs. Gale become the targets...

28/12/1963      Dressed to Kill (Mrs. Cathy Gale)

A missile attack is detected by all but one of the country's early warning stations, but then turns out to be a false alarm. When property near to the station that was the exception is put up for sale, Steed and six other prospective land owners are invited to a New Year's Eve costume party held aboard a train. But during the party, the train is left stranded at an abandoned station in the middle of nowhere. And when the guests start to die one by one, it is up to Steed and Mrs. Gale to find the murderer…

04/01/1964      The White Elephant (Mrs. Cathy Gale)

A rare albino elephant disappears from ‘Noah's Ark’, an ‘animal distribution centre’ for zoos worldwide. Steed calls upon Mrs’ Gales experience of living in Africa to persuade her to pose as a former big game hunter, in order to apply for a position as the zoo's chief zoologist. But Steed soon uncovers a lot more than just a missing elephant, and Mrs. Gale ends up in the tiger cage...

11/01/1964      The Little Wonders (Mrs. Cathy Gale)

When Steed and Cathy search the baggage of the late Reverend Harbottle, they find a gun, ammunition, and an antique doll with a head full of microfilm. Posing as Harbottle's replacement, Steed infiltrates Bibliotek, a very old crime syndicate fronted as an international church, and which is planning a conference for their major members. But when their dying leader asks his ‘flock’ to vote on his replacement, his assistant, Sister Johnson, makes the decision for them with the use of a machine gun…

18/01/1964      The Wringer (Mrs. Cathy Gale)

When five of the six agents working in an espionage ‘pipeline’ on the Austro-Hungarian border are killed, Charles assigns Steed to investigate his old friend Hal Anderson, the sixth agent on the pipeline who vanished six weeks ago. Steed tracks Anderson to Scotland, but Anderson betrays him and presents Charles with indisputable evidence that it was Steed who was responsible for the murder of the agents. Charles sends Steed to an interrogation camp run by a man code-named ‘The Wringer’, where psychological torture and brainwashing are used to get to the truth. But Cathy has more faith in Steed than his superiors, and she discovers that they are guilty of gross negligence in the management of their own interrogation facility…

25/01/1964      Mandrake (Mrs. Cathy Gale)

When Steed attends the funeral of a retired agent held in Cornwall, he notices an unusually high number of recent burials for such a small, almost deserted village. He and Mrs. Gale investigate, and uncover a murder-for-hire scheme by ‘Mandrake Investments’, who arrange for the corpses of poisoned victims to be buried in the churchyard, which is located near a disused tin mine; the heavy arsenic-level of the soil will prevent any possible exhumations and post-mortems from finding anything unusual...

01/02/1964      The Secrets Broker (Mrs. Cathy Gale)

Two brothers, Allan and Frederick, are the targets of a blackmail conspiracy that involves a fake spiritualist, her violent mother and Frederick's boss at the wine shop where he works: Allan must use his lover, Marion, to shut down the alarms at the top-secret research base where she works, while Frederick is forced to kill one of Steed's colleagues at the wine shop. Steed investigates the shop, and finds not only some excellent vintages, but also a darkroom hidden in a wine casket; meanwhile, Mrs. Gale looks into the electronics firm working on a top secret project for the government. But then Marion's failure results in the death of her husband…

08/02/1964      Trojan Horse (Mrs. Cathy Gale)

Steed is assigned to look after the security of a shah's horse, which is currently in England for a season of races. The horse is lodged at the Meadows Stables, where Steed discovers that the owner, George Meadows, owes a bookie named Heuston a considerable gambling debt, run up after Meadows bet on his own horses. Meadows is unable to speak out without causing himself to be ruined, and so Steed sends Mrs. Gale to get an executive position with the criminal's business front. Together they uncover an assassination service in which jockeys use special binoculars with built-in poison-dart guns to silently dispatch the desired target in public…

15/02/1964      Build a Better Mousetrap (Mrs. Cathy Gale)

A motorcycle gang has permission to ride on an area of land, but the Peck sisters, two little old ladies that live in a nearby mill, are annoyed by the noise and decide to cast a spell on the bikers. The motorbikes inexplicably stall, along with every other mechanical device within two miles. The townsfolk blame the nuclear test facility situated in the area, but when Steed and Mrs. Gale investigate, they find that the station's own clocks are stopping, and that cars in perfect working order have also ceased to function. Mrs. Gale joins the motorcycle gang to see if they can provide a clue, but it isn’t long before the two old ladies are suspected of possessing an advanced electronic device, and some rather unsavoury crooks have their eyes on it....

22/02/1964      The Outside-In Man (Mrs. Cathy Gale)

Sharp, a British traitor and defector who is now an Abarain revolutionary engaged in negotiating arms talks in England. Five years ago, Sharp was the target of a failed assassination attempt, and by an amazing coincidence, Mark Charter, the agent assigned to kill him, and who has been presumed dead, arrives on the scene after spending five years in prison. Fearing that Charter may wish to continue his failed mission, Steed and Mrs. Gale find themselves charged with the task of protecting a man Britain had once wanted dead, and must stop Charter before he ruins the arms talks...

29/02/1964      The Charmers (Mrs. Cathy Gale)

When a large number of enemy agents are murdered, Steed is implicated. After managing to convince the other side that a third party is responsible, Steed calls a truce and agrees to an exchange program so as to keep an eye on one another. Mrs. Gale is teamed up with a Soviet agent, and Steed also receives a new partner, the lovely Kim Lawrence - in reality an actress hired by the other side. After Mrs. Gale's partner is killed at the dentist's, Steed and Kim search for clues at a hat and tie shop. Both parties follow the trail to a charm school that is producing assassins disguised as perfect gentlemen...

07/03/1964      Concerto (Mrs. Cathy Gale)

After a young woman is found dead inside the apartment of Stefan Veliko, a visiting Soviet concert pianist, Steed is called in to investigate. Steed follows the clues to a strip club, while Mrs. Gale looks into the British Cultural Council. They discover that the murder is part of a plot to blackmail Veliko into shooting a delegate while at a recital, an act that will destroy the British-Soviet trade talks. Mrs. Gale soon finds herself in a very unpleasant situation involving a gun and a single bullet...

14/03/1964      Esprit De Corps (Mrs. Cathy Gale)

Corporal Craig of the Highland Guards is inexplicably found dead, and the bullets that killed him are found to come from three different rifles. In order to uncover the truth, Major Steed returns to service, and, together with Mrs. Gale, discovers that Craig was executed for treason. They soon learn of a plot to take over the government and to replace the royal family of Windsor with a descendent of the Stuart royal line. Not only that, but when Mrs. Gale learns that she is of royal blood, she finds herself part of the coup and soon be crowned as Queen Anne II...

21/03/1964      Lobster Quadrille (Mrs. Cathy Gale)

After an agent is killed in a fire while investigating an increased level of radioactivity in seafood, Steed and Mrs. Gale arrive on the scene. They uncover a plot by Quentin Slim, a man thought to be dead, but who is alive and well and currently smuggling heroin. But Mrs. Gale is captured by Quentin, who plans to set fire to the hut where she is being held captive...