The Avengers (1961–1969)
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While guarding a United Nations negotiator after an assassination attempt, Steed and a colleague fall under suspicion for selling state secrets.


Don Leaver


Anthony Terpiloff (teleplay), Brandon Brady (teleplay)




Episode complete credited cast:
Patrick Macnee ... John Steed
Jon Rollason ... Dr. Martin King
Frank Gatliff Frank Gatliff ... Harvey
Carleton Hobbs Carleton Hobbs ... M'sieur Roland
Arthur Hewlett ... One Twelve
Gillian Muir ... Judy
Anne Godley Anne Godley ... Lillian
Michael Mellinger ... Fraser
Richard Klee Richard Klee ... Workman
Storm Durr Storm Durr ... Gunman
Cyril Renison Cyril Renison ... Customer
Anthony Blackshaw ... Policeman
Ray Browne Ray Browne ... Price


While guarding a United Nations negotiator after an assassination attempt, Steed and a colleague fall under suspicion for selling state secrets.

Plot Summary | Add Synopsis







Release Date:

6 February 1991 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


Dr. Martin King: Look, at the risk of being a bore, would you mind filling me in on a little of the case history, such as why you got me out this morning to render first aid to a dead man?
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User Reviews

Jon Rollason's farewell appearance
17 December 2010 | by kevinolzakSee all my reviews

Episode 29, "The Sell-Out," was the third and last to feature Jon Rollason's Dr. Martin King (but the first to be broadcast), as well as the last to feature a male partner for Steed (Patrick Macnee, for the third straight time, receives sole billing in the opening credits). While Ian Hendry's Dr. David Keel was often seen in his surgery with Ingrid Hafner's nurse Carol Wilson, this would prove to be the only time that Steed would visit Dr. King, offering a final look at Gillian Muir's nurse, Judy, barely noticeable in her back-to-back appearances. This time, Dr. King aids Steed in ensuring the safety of a high ranking French official (Carleton Hobbs) attending a secret peace conference in London for the UN. Michael Mellinger (previously seen in "The Far-Distant Dead") plays the barber shop informant who trails Steed, and Frank Gatliff ("One for the Mortuary," "A Chorus of Frogs," and "Love All") heads up the security team. Arthur Hewlett makes his only series appearance as One Twelve, Steed's superior, who scoffs at the notion that there might be a traitorous informer sabotaging their security efforts. Often in these early efforts, and prior to the final season introduction of Patrick Newell's popular Mother, Steed would take his orders from an on-screen superior, the most frequent being One Ten, played in ten episodes by Douglas Muir ("Diamond Cut Diamond," "The Springers," "Death on the Slipway," "The Tunnel of Fear," and "The Deadly Air," all from season one, with "Death Dispatch," "Warlock," "Mr Teddy Bear," "The Removal Men," and "Immortal Clay" from season two). One Six (Michael Gover) appeared twice ("Man in the Mirror" and "A Chorus of Frogs"), Charles (Paul Whitsun-Jones) appeared twice ("Man with Two Shadows" and "The Wringer"), while One Twelve, One Seven (Frederick Farley in "School for Traitors"), One Fifteen (Eric Dodson in the lost first season enrty "Dragonsfield"), and Quilpie (Ronald Radd in "The Outside-In Man") made just one appearance each. One Twelve remains a deliberately shady character, whom Steed admits to never having worked with before (and never would again). There are too few red herrings, and while it may be a shame that the partnership between Steed and Dr. King was so necessarily brief, subsequent casting proved that the show's popularity would endure beyond its 8 years on the air.

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