The Avengers Season 4 Episode release dates & where to watch

1. The Town of No Return

Four agents have vanished, looking for each other, in Little Bazeley-by-the-Sea. Steed and Emma go in for the man who went in for the man who.... and meet the odd local landlord, blacksmith and vicar. Are they more than they seem?

2. The Gravediggers

Has the late Dr Marlow's proposed radar-jamming system been tested against British defences? If so, the dead scientist seems to be doing it from his grave. And what's the connection with the local hospital's bizarre operations and a train-crazy philanthropist?

3. The Cybernauts

A vastly strong, bullet-proof killer homes in on and destroys several electronics executives. Could it have something to do with Dr. Armstrong's automated work place? Or with the activities of a nearby karate school...

4. Death at Bargain Prices

When an agent is killed in the lift of Pinter's Department store, Steed and Emma get involved with King Kane, a tycoon who lives in a penthouse above the store. Why is Professor Popple, a missing atomic scientist, being held in the bargain basement?

5. Castle De'ath

Why have all the fish vanished from the Scottish coastline? Does it have anything to do with a dead frogman, found stretched as if on a rack? Steed and Emma think so, which is why they're guests of Ian, the 35th Laird of Clan De'ath, and in danger of being caught by the gillies.

6. The Master Minds

A government official, dresssed as one of the Horse-guards, helps in a raid on secret files and is wounded. Recovering, he remembers nothing. Is his crime anything to do with his membership of Ransack, a club for those with high IQs? Emma can join, but Steed may have to cheat....

7. The Murder Market

What could an outbreak of motiveless murders have to do with the activities of a marriage bureau called Togetherness Inc.? Well, think of Hitchcock's 'Strangers On A Train' and you'll be close. Steed and Emma seek their ideal partners....

8. A Surfeit of H2O

A poacher drowns in a field during a freak storm, and Jonah, the village carpenter, starts building an ark. But Steed thinks it's all got more to do with the permanent cloud that hangs over Grannie Gregson's Glorious Grog factory.

9. The Hour that Never Was

Following a motor crash, Steed and Emma explore the seemingly deserted RAF Hamelin, where they were heading for a party to celebrate the base's closure. Is this surreal landscape all a dream, or is it something worse?

10. Dial a Deadly Number

A series of sudden deaths in high finance leads Steed to dabble in shares while Emma investigates the makers of executive paging devices. Are companies being acquired through a simple and subtle form of murder?

11. Man-Eater of Surrey Green

Deaf botanist Alan Carter's fiancee walks away from their floral bliss under some strange influence, and is picked up by an entranced chauffeur. Has it got anything to do with the giant seed from outer space that has landed nearby?...

12. Two's a Crowd

Colonel Psev, a mysterious and unseen foreign spy with a toy fixation, arrives in London to infiltrate a defence conference. His four aides bully Brodny, the ambassador, until he comes up with a cunning ruse: Gordon Webster, rakish male model, is Steed's double.

13. Too Many Christmas Trees

Christmas. Steed is having bad, seemingly prophetic, dreams, involving festive themes and a dead agent. Can he find solace at a fancy-dress party in the country home of a Dickens enthusiast?

14. Silent Dust

The lack of martens in a pleasant stretch of English countryside alerts Steed to the possible release of a fertiliser that has failed, reducing a landscape to a wasteland. But why is the local farming community so aggressive?

15. Room Without a View

A brilliant scientist reappears at the house of his wife. Has he escaped from notorious Manchurian prison camp Ni-San? And why have so many missing people stayed at the Chessman Hotel? Steed and Emma book in.

16. Small Game for Big Hunters

When a man is found under Shirenzai, the trance-like Kalayan voodoo, in the heart of Hertfordshire, Steed finds himself amidst the horror of the last days of empire. Are bandits loose in the English countryside?

17. The Girl From Auntie

Steed returns from holiday to find that a quite different Mrs. Peel is inhabiting his old friend's flat. With the aid of actress Georgie Price-Jones, he discovers that Art Incorporated and the Arkwright Knitting Circle are doing more together than just sharing needles.

18. The Thirteenth Hole

An agent is shot on the thirteenth hole of the Craigleigh golf club, so Steed and Emma join the club. Steed puts his limited skills to use in a murderous tournament, but Emma helps him get a hole in one.

19. Quick-Quick Slow Death

An agent is run over disposing of the body of a man in a dinner suit, while he was pushing him along in a pram. This all has something to do with Terpsichorean Training Techniques, a dance school where Emma teaches and Steed enrols.

20. The Danger Makers

Several military figures have been killed in dangerous games of daring. Emma and Steed follow the trail to a secret society of military men with very dangerous aims.

21. A Touch of Brimstone

When a group of hoaxsters called the Hellfire Club mix murder with their mischief, Steed and Emma demonstrate a few tricks of their own. The whalebone corset, high laced boots and spiked dog-collar Emma wears as the "Queen of Sin" were designed by Diana Rigg herself, and resulted in A Touch of Brimstone being banned from American TV.

22. What the Butler Saw

According to Steed's double-agent barber, one of three military men is a traitor. But which one? To find out, Steed becomes a butler, and Emma starts Operation Fascination to trap the woman-hungry Group Captain Miles.

23. The House That Jack Built

Emma inherits some property from her deceased Uncle Jack. The property is a very bizaarre house, and when Emma goes to inspect it, she finds herself trapped in a labyrinth of psychological torture.

24. A Sense of History

A death by archery sends Steed and Emma undercover at St. Bodes Academy, where the arguments between staff and hip students, and between different theories of history, seem to have taken on a murderous edge.

25. How to Succeed... at Murder

When several top executives die, their secretaries take over their firms. Is it mere chance, or are women trying to take over the world? Steed employs a deadly secretary, and Emma finds sorority down at the gym.

26. Honey for the Prince Finale

Steed and Emma return from a party to find a dying agent in Steed's flat. What is the connection between honey, a firm which makes fantasies to order and the oil deal promised by a visiting Bavarian Prince?