The Avengers: Season 3
The Avengers Season 3 continues the overarching saga across 26 episodes.
Season 3 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Picks up essential narrative continuity directly following the events of The Avengers Season 2.
- Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
- Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
- Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
Season overview
The Avengers Season 3 continues the overarching saga across 26 episodes.
Episode Guide
Season 3 Progress Shield
Brief for Murder
Sep 28, 1963
Thanks to the clever briefing of the Lakin brothers a man charged with treason is found not guilty. Mrs Gale believes that Steed is implicated, and contacts the newspapers. Steed
The Undertakers
Oct 5, 1963
All the occupants of a rest home, Adelphi Park, are multi-millionaires. And most of them are refusing to see anyone, including Professor Renter who was due to fly to America with
Man with Two Shadows
Oct 12, 1963
Agent Borowski has been brainwashed by the enemy, but between moments of multiple-personality disorder he tells Steed that three 'doubles' have been created. Steed tracks down one
The Nutshell
Oct 19, 1963
The Director of Operations (Disco) of the Nutshell, a subterranean World War III bunker, tells Steed and Cathy that Big Ben, a file giving details of all their double agents, has b
Death of a Batman
Oct 26, 1963
At the reading of the will of Wrightson, Steed's former batman, the man's family are shocked to discover his estate is worth a fortune. Steed and Cathy set out to find out where
November Five
Nov 2, 1963
Michael Dyter, the newly elected MP for South-East Anglia is shot shortly after making his acceptance speech in which he had threatened to expose a major scandal involving the gove
The Gilded Cage
Nov 9, 1963
Steed's trap for criminal mastermind J.P. Spaggs involves a brilliant plan to steal a million pounds in gold bullion. But when two detectives arrive at Steed's flat and arrest Cat
Second Sight
Nov 16, 1963
The cornea grafts that will, hopefully, restore the sight of blind millionaire Marten Halvarssen fascinate Steed: they're rumoured to be coming from a live patient, one Hilda Brau
The Medicine Men
Nov 23, 1963
Willis-Sopwoth, a top pharmaceutical firm, is being drained by cheap imitations of its products in foreign markets. The death of a member of staff while investigating the fraud br
The Grandeur That Was Rome
Nov 30, 1963
Strange diseases are being reported in various parts of the world, and Steed's suspicion is that somebody has been tampering with the insecticides and fertilisers of United Foods a
The Golden Fleece
Dec 7, 1963
Steed and Cathy eat at a Chinese restaurant, but, as ever, it's not just for fun: Steed suspects the owner, Mr Lo, of gold smuggling. He also seems to be allied with Army types w
Don't Look Behind You
Dec 14, 1963
Invited to spend the weekend at the home of medievel costume expert Sir Cavalier Resagne, Cathy finds herself alone in the house, pestered by a young man who claims to be a film di
Death "à la carte"
Dec 21, 1963
Emir Abdulla Akaba is visiting London for his annual medical, and Steed suspects an assassination attempt. Despite Steed assumming the guise of a chef, the Emir seems to have been
Dressed to Kill
Dec 28, 1963
An incoming missile attack, which is detected by all but one of the country's early warning stations, proves to be a false alarm. Steed finds himself attending an exclusive New Ye
The White Elephant
Jan 4, 1964
The disappearance of an albino elephant from Noah Marshall's zoo seems to be linked to Steed's investigation of ivory dust in a gun shop. Steed sets out to rescue Cathy from the t
The Little Wonders
Jan 11, 1964
Bibliotek are a criminal organisation who are fronted as a church. A coming 'Bible Class' will decide who runs Bibliotek. It could be Steed...
The Wringer
Jan 18, 1964
Six agents have died on an escape route through Hungary and Austria. Anderson, a friend of Steed's, has also gone missing. Steed finds his friend but is then accused of being a t
Mandrake
Jan 25, 1964
After attending the funeral of an old friend in a lonely Cornish village cemetery, Steed discovers a plot to poison millionaires.
The Secrets Broker
Feb 1, 1964
One of Steed's colleagues has been murdered, and the subsequent investigation takes Cathy to a top-secret research establishment and Steed to a wine merchants.
Trojan Horse
Feb 8, 1964
Jockeys and stable hands are being trained in the use of firearms and poisons, so Steed delves deep in the murky world of horse racing.
Build a Better Mousetrap
Feb 15, 1964
What does Cathy joining a motorcycle gang, two elderly ladies who own a watermill and claim to be witches, and all of the clocks stopping at a local atomic research station have in
The Outside-In Man
Feb 22, 1964
Arabian revolutionary Sharp is visiting Britain and Steed is put in charge of security. He thinks it is ironic that they are now protecting a man they were trying to kill five yea
The Charmers
Feb 29, 1964
The opposition believe Steed is responsible for the death of their agent Vinkel. Steed, however, had nothing to do with the murder and, as a show of good faith, agrees to a swap o
Concerto
Mar 7, 1964
Soviet-British trade talks are coinciding with the first London concert of the brilliant young pianist, Stefan Veliko. A young girl accuses Veliko of assault, and is then murdered
Esprit de corps
Mar 14, 1964
The mysterious death of Corporal Craig of the Highland Guards sends both Steed and Cathy undercover into the army ranks. There, Steed finds himself under court-martial and Cathy b
Lobster Quadrille
Mar 21, 1964
When an agent investigating radioactivity levels in shellfish is killed in a beach hut fire, Steed and Cathy get involved in the heady worlds of nightclubbing, chess and lobster fi