The Avengers (1961–1969)
3 user 1 critic

Who's Who??? 

Mad scientist Dr. Krelmar is working on a machine that allows two people to swap minds and enemy agents Basil and Lola intend to use it with the Avengers to get them to destroy their ... See full summary »


John Llewellyn Moxey (as John Moxey)


Philip Levene (teleplay)

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Episode complete credited cast:
Patrick Macnee ... John Steed / Basil
Diana Rigg ... Emma Peel / Lola
Patricia Haines ... Lola / Emma Peel
Freddie Jones ... Basil / John Steed
Campbell Singer Campbell Singer ... Major 'B'
Peter Reynolds ... Tulip
Arnold Diamond ... Krelmar
Philip Levene Philip Levene ... Daffodil
Malcolm Taylor Malcolm Taylor ... Hooper


Mad scientist Dr. Krelmar is working on a machine that allows two people to swap minds and enemy agents Basil and Lola intend to use it with the Avengers to get them to destroy their network. Basil exchanges personalities with Steed but Mrs. Peel is suspicious that the man who looks like her partner is acting out of character and has to persuade the real Steed what is going on. Written by don @ minifie-1

Plot Summary | Add Synopsis







Release Date:

19 May 1967 (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?


Brian Clemens the producer of the series, told that during this episode Diana Rigg and Patrick McNee took some days off and that's the reason why the producers and screenwriters imagined a screenplay with some actors to replace them. See more »


When Tulip discovers the pile of dead agents in Steed's closet, one of the agent's feet in the foreground is moving slightly. See more »


John Steed: [in Basil's body] What sort of fiend are we dealing with? A man who would bite the end off a cigar is capable of anything.
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Alternate Versions

The 5th season episodes 10 (Never, Never Say Die), and 16 (Who's Who???), were released as a theatrical movie in the UK (1968), with a running time of 102 minutes. It was also distributed in Portugal (October 1, 1969), titled "Os Vingadores: Aventuras de Steed e Peel", with introduction and linkage scenes with Patrick Macnee, shot by Sidney Hayers. See more »

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User Reviews

Sheer perfection!
8 October 2008 | by kevinolzakSee all my reviews

Surely a top ten entry on anyone's list of favorites, this episode has two enemy spies swapping identities with Steed and Mrs. Peel so as to bump off the Avengers network from the inside. Philip Levene, along with Brian Clemens, was clearly among the series' best writers (and here puts in a cameo as Daffodil), and this ingenious script allows Sir Patrick and Dame Diana to indulge in all the delightful carnage they wouldn't ordinarily do (Mrs. Peel chewing gum, Steed planting a big wet one on Emma's luscious lips!) Often overlooked is the excellent work from top billed Patricia Haines (previously seen in "The Nutshell" and "The Master Minds") and Freddie Jones (Hammer stalwart of "Frankenstein Must Be Destroyed" and "The Satanic Rites of Dracula"), the only time two different actors enacted the roles of The Avengers, having no success in convincing their superiors of what has transpired (Question-"Do you take me for a perfect idiot?" Answer-"No one's perfect!") Another favorite line concerns Steed noting that Basil bites off the ends of his cigars, remarking that such a man is capable of anything! (longtime viewers remember that Steed himself did just that in previous seasons). Things really start to heat up once the villains realize that they much prefer their new bodies over the old, ordering Steed and Mrs. Peel to be shot on sight! This was the only time during the Emma Peel era that we see one of Steed's superiors, here called Major "B" (Campbell Singer, previously seen in "Six Hands Across a Table"), running 'a bouquet of agents,' somewhat similar to Patrick Newell's Mother, who would soon arrive on the scene. Sit back and enjoy the two stars having the time of their lives, and let the narrator be confused for a change. Peter Reynolds previously did "Double Danger," Malcolm Taylor had done "Mission to Montreal," while Arnold Diamond (playing the inventor of the transmigration machine) returned for the excellent "Fog," but Patricia Haines ("The Night Caller," "The Virgin Witch"), the lovely former wife of actor Michael Caine, was making her last appearance on the show (her tragic death in 1977 at 45 was due to cancer). This gem was the only episode to be directed by veteran John Llewellyn Moxey, who did the classic "City of the Dead" (1960), before emigrating to Hollywood to become even more prolific in TV movies like 1971's "The Night Stalker," which inspired the cult series that followed in 1974.

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