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.

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.

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.

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?

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.

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.

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.

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.

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.

Trusted agent Melville has lost three partners in quick succession, and seems to be lying at every opportunity. Is he really the man to partner Steed in an attempt to convict Lord Edgefield, noted blackmailer? And what is the odd connection between this whole affair and daily milk deliveries?

The leaking of secrets at Carmadoc Research Establishment throws suspicion on to Steed, who must suffer the torment of house arrest while Tara goes in with a new partner.

Members of the Institute of Timber Technology are being killed by a pair of caddish assassins, their advantage being an ability to destroy wood in seconds.

Tara's uncle is being held against his will in a country hotel. So Tara books in, and finds herself equally discouraged from leaving. Could the place also be home to the agent that Mother is missing?