Henry Sterling, a mild-mannered bank clerk, visits a music hall to pay the manager a debt owed by his cheque-bouncing philandering brother. He is persuaded to stay and become the subject of a stage hypnotist, "The Great Mendoza". Fleeing back home, he cannot remember where he's been and what he's done.

His now-twin personas come and go at random. When in the hypnotised state, he becomes very reckless, both in chatting up women he would never normally dare approach, and spending money he has not got.

After he insults his domineering mother-in-law, his wife leaves him. He robs his boss of £300, but his brother realises what has happened and persuades the hypnotist to get him back to normal.

The film was made at Elstree Studios with sets designed by the art director Terence Verity and shot in Technicolor by cinematographer Erwin Hillier.

The Monthly Film Bulletin wrote: "This film will either entertain or bore, according to one's reaction to this venerable brand of farce. Most of the fun is derived from well-worn stage jokes, but, on the whole, they are put across with enough vigour and verve to make them seem quite fresh. Slow to start, it warms up into a fairly bright little film. There are nice performances by Joan Sims as the maid and Alan Badel as the magician. George Cole is not quite at ease as Henry, but perhaps this is because the part seems to belong to Robertson Hare, and one tends to think of Henry as middle-aged. "^[5]

The New York Times wrote, "Although the British movie makers have been known to make the most of humor, their infrequent lapses in this genre can be deadly dull. And Will Any Gentleman . . .?, the farce by that cryptic title, which landed at the Plaza yesterday, falls flatly into the latter niche...All that may be said of Michael Anderson, a young and respected director, is that he has kept his cast, if not his story, moving. George Cole is largely bewildered and woebegone as the transformed bank teller. Jon Pertwee, who looks a bit like Danny Kaye, adds an occasional comic touch as his energetic, scapegrace brother. ... As the film's confused detective, William Hartnell delivers the script's most ambitious line when he says, "there's something funny going on around here!"^[6]

Cineoutsider described the film as "an adaptation that manages to maintain a certain level of energy throughout its running time. Although the main premise may be a little tired, the witty dialogue and superb acting keep the pace up despite the stilted direction and the occasional dud routine. For the most part its essentially filmed theatre, but that is no reason for it to be dismissed out of hand."^[7]

• Will Any Gentleman...? at IMDb  
• Will Any Gentleman...? then-and-now location photographs at ReelStreets