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?

When representatives of the two organizations head to a country church to investigate the sudden reappearance of a man long thought dead, Steed and Emma are called in to help. It isn't long, of course, before murder rears its ugly head.

The mauling to death of several members of the committee of PURRR (the Philanthropic Union for the Rescue, Relief and Recuperation of Cats) exposes Steed and Emma to a diabolical scheme to take over the entire country.

Foreign agents are being killed, but not by British agents. Steed thinks it terribly unfair, and so does his opposite number, Nutski. They make an arrangement, and Steed and Emma find themselves with Soviet partners in an investigation of a group of very British killers.

An unfortunate motorist keeps knocking down and killing the same man: a man who's rampaging through the countryside, bulletproof and intent on destruction. A man who just happens to be identical to the urbane Professor Frank N. Stone.

Three Hollywood veterans, led by an insane director, decide that Emma would be perfect for their latest movie, so they kidnap her and film some surreal and deadly footage.

Steed is invited to a party, and finds himself trapped in a remote-controlled aircraft, with six fancy-dressed specialists in various combat styles, en route to a distant island. There, they are pitted against each other in a deadly test.

When Lucas, an agent investigating something subversive, gets off his train at the wrong station he is murdered. Has the crime got anything to do with a mole at the admiralty, a train ticket and a fiendish plot to kill the Prime Minister?

Secrets known only to a small group of trusted men have leaked, and the men are having strange dreams of their childhood, featuring their nannies and a bouncing ball. Emma checks out the toyshop, Steed explores a school for nannies.

Invited for the weekend to the home of a fellow Bridge Expert, Emma finds herself trapped in a house designed to send her mad. Her tormentor is Max Prendergast, a man she befriended and then betrayed in Berlin some time before. Then Steed came to the rescue but now he's at home nursing a sprained ankle.

When one of the Floral Network of agents is found dead atop a pair of stilts, Steed and Emma's interest is piqued. That's the idea, because foreign agents Basil and Lola have a trap prepared for them: a machine that swaps their minds into the pair's bodies.

The brother of the late Clement Armstrong sets a deadly trap for Steed and Mrs. Peel, whom he blames for his brother's death at the hands of his murderous creations, the Cybernauts.

A European peace conference comes under the threat of sabotage when the British delegates begin to suffer from premonitions and nightmares. After Sir Andrew Boyd, who has witnessd his death in a dream, is killed, Steed and Emma must keep his replacement, Lord Melford, sane and alive.

The accidental death of a ventriloquist reveals that he had been carrying a fortune in gems inside his stomach. Steed stoops to blackmail and Emma goes shopping for ties in the search through the business community for a rich Borzoi.

A missing briefcase full of secrets propels Steed and Emma into a treasure hunt by car.

Various millionaires are withdrawing large sums of money from the bank. Steed suspects blackmail but none of the men is willing to talk. Then he gets a call from Gilbert Jarvis, who tells Steed that he, Jarvis, has 'just been murdered'. Again.

When a scientist is found embedded in a wall, Steed and Emma pursue a man in make-up and wellies, whose appearance is terribly shocking.

Emma's old friend, Paul Croft, returns from abroad to retire to Little Storping-in-the Swurf. Unfortunately, the village seems to be run along very strange lines. Threatened by yokels, Emma finds herself outnumbered.

When Sir Gerald Bancroft and his Rolls-Royce vanish whilst being escorted at a military base, Steed is called upon to solve the puzzle. But before he can he experiences that old shrinking feeling.