Inspector Duval comes to London to help crack the case of a socialite murdered during a jewel heist.

British crime film directed by Peter Duffell and starring Bernard Lee, Moira Redmond and John Van Eyssen, loosely based on the 1918 novel "The Man Who Knew" by Edgar Wallace.

An ex-convict who's built a respectable post-prison life for himself as an engineer discovers that a past is a hard thing to shake. When old "friends" contact the former prisoner, it's not long before the gone-straight baddie finds himself being blackmailed into taking part in a major jewelry theft.

The year is 1904; the setting is Cockshute Towers, one of England's stateliest homes. When the household is threatened with bankruptcy, both the masters and the servants are prepared to co-operate in trying to find some cash - after all, most of them are enjoying liaisons of one kind or another among themselves, and none have any desire to give up their rewarding way of life...

An avaricious, ambitious fellow, desiring to hold the reins for a major auto company, must frame someone for murder before he can get what he wants. He chooses a reformed embezzler who works for the company.

Insurance salesman Tom and his wife Jenny are struggling through the first years of marriage in a modest flat, on Tom's even more modest salary. By contrast Drew, Tom's old army pal, is a footloose bachelor currently running a car-hire firm owned by his rich uncle, who lives in Canada. Since Drew's uncle makes it clear that his nephew will only inherit the business when he's a respectable married man, his upcoming visit throws Drew into a panic. Having taken a fancy to the vivacious Jenny, Drew persuades her to masquerade as his wife – an arrangement that leads the trio into some highly complicated situations!

A greedy but successful professional gambler wants to join the British Establishment when he falls in love with a blue-blooded lady. But first he must mend his ways and then dump his nightclub singer girl friend. She's not so easy to get rid of, neither is his past.

Janet Miller (Lana Morris) is a married woman caught in awkward circumstances after police investigating a murder come up with evidence, and a potentially lethal motive, which lead them to suspect her of committing the crime. Their suspicions increase when Janet is less than forthcoming about a visit she paid to a former beau. Happily, her loyal husband (Ronald Howard) swears by her innocence and quickly leaps into motion to find the real killer.

Narcotics agent Dennis goes undercover in the Mediterranean Islands to investigate a smuggling operation, and gains the confidence of a woman who works for the ringleader. But Dennis ends up arrested for murder when the crime boss turns up dead.

Accident-prone Gil wants a steady job but is dismissed by every company that recruits him due to his unfortunate habit of ending up in sexually embarrassing situations. His girlfriend Annette says that she will marry him only if he can stay employed for at least a week. Hired by Mr Grimwood's cleaning company "Here To Service You", Gil is unwittingly drawn into a series of bawdy misadventures: sharing a bath with a married woman and getting caught by her husband; having a threesome with a hospital patient and a woman doctor, followed by a foursome with Annette, Grimwood and a woman psychologist; awkward encounters with a gay man and a lesbian; and getting caught by Annette playing strip poker with a group of women. Incredibly, Gil remains in his job and Annette marries him, but before the couple can have their wedding night Gil collapses on the bed and passes out from exhaustion.