The Avengers (1961–1969)
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The Cybernauts 

The Avengers investigate a series of murders of Corporate men, who have all been bidding on a new circuit element. Each one of them seems to have been killed by a powerful Karate blow, so ... See full summary »


Sidney Hayers


Philip Levene (teleplay by)




Episode complete credited cast:
Patrick Macnee ... John Steed
Diana Rigg ... Emma Peel
Michael Gough ... Dr. Armstrong
Frederick Jaeger ... Benson
Bernard Horsfall ... Jephcott
Burt Kwouk ... Tusamo (as Bert Kwouk)
John Hollis ... Sensai
Ronald Leigh-Hunt ... Lambert (as Ronald Leigh Hunt)
Gordon Whiting Gordon Whiting ... Hammond


The Avengers investigate a series of murders of Corporate men, who have all been bidding on a new circuit element. Each one of them seems to have been killed by a powerful Karate blow, so Mrs. Peel visits a Karate Dojo, Steed's inquiries lead him to United Automation, where ex-Ministry scientist Dr. Armstrong is working on an electronic brain, not to mention cybernetic men. Written by The TV Archaeologist

Plot Summary | Plot Synopsis







Release Date:

28 March 1966 (USA) See more »

Company Credits

Production Co:

ABC Weekend Television See more »
Show more on IMDbPro »

Technical Specs

Sound Mix:


Aspect Ratio:

1.33 : 1
See full technical specs »

Did You Know?


Reference is made to a new type of circuit that could replace the transistor and revolutionize electronics. Vacuum tubes had been the foundation of electronics from 1905 till the mid 1950s when the first transistor radios hit the market. By the mid 60s transistors had become so standard that many TV programs referenced some future electronics revolution, but none foresaw the semiconductors we now use. See more »


After the assassin cybernaut literally beats out the brain of the worker cybernaut, the skull of the worker is shown as still being intact. See more »


John Steed: [Emma is under attack from a Cybernaut] Mrs. Peel, throw me the pen, the pen thrown it me.
[she obliges, the Cybernaut turns to follow the pen]
John Steed: It's a short wave device, works like a guided missile.
Emma Peel: Well get rid of it then!
John Steed: Don't worry, I will.
[turns corner to find Armstrong and another Cybernaut coming at him]
Dr. Clement Armstrong: That won't help you, Steed, this one has a brain of it's own.
See more »


Featured in The Avengers: Return of the Cybernauts (1967) See more »


Romeo and Juliet Overture-Fantasia: Love Theme
Composed by Pyotr Ilyich Tchaikovsky
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User Reviews

One of the series' best
9 September 2007 | by bensonmum2See all my reviews

A series of otherwise unrelated murders have a few things in common. Namely, the perpetrator in each instance appears to be unstoppable. Neither bullets nor doors slow him down. Steed and Mrs. Peel are called in to investigate and soon find the genius behind a technology company is central to all the murders. But he's wheelchair-bound. He couldn't be responsible for the killings. Or could he?

"The Cybernauts" has to be one of my all-time favorite episodes of The Avengers that I've seen. The mix of sci-fi, espionage, horror, and that touch of humor ever present in the show make this one near perfect. The tension gets turned up a notch as Mrs. Peel becomes the mistaken target of an unstoppable killer. The finale is more than satisfying. The special effects may be laughable when compared to what we have today, but to me that's part of the shows charm. Diana Rigg and Patrick Macnee are wonderful. In just a few episodes, the two work together as if they had done so forever. They are joined in "The Cybernauts" by the very capable Michael Gough. Even though he's in a wheelchair the entire episode, he's an actor quite capable of dominating any scene he's in. Nicely done by everyone involved!

If you've never seen The Avengers and are curious about the fuss, "The Cybernauts" would be a good one to start with.

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