Richard Diamond, Private Detective(1957)

Diamond promises a dying gangster that he will take care of the gangster's girlfriend, unaware that the promise will endanger his life.

A man hires Diamond to watch over his frightened wife while he is out of town, but then Diamond is approached by a pair of doctors from a mental institution who claim she is an escaped patient.

Diamond sets out to con a recently widowed woman and her lover into believing that he witnessed them kill her late husband so that they could collect the insurance money.

While on holiday in the mountains Diamond befriends a young woman who is being pursued by thugs who believe that she has taken some incriminating photos.

Diamond poses as a rich Canadian and infiltrates a gambling racket in order to learn the truth about a businessman's claims that he witnessed a murder.

Diamond is hired by a woman to become a bodyguard to her husband, without him knowing it. He is a businessman who has received several threats against his life which he refuses to take seriously.

Diamond unravels a story of unrequited love and revenge while tracking down a fugitive gangster who is in the possession of a valuable stolen necklace.

Diamond plays a game of cat and mouse with an escaped convict who bears a grudge against Diamond for bringing him to justice.

Diamond is hired to verify the authenticity of an ancient Greek statue, which is suspected of being fake when it is offered for sale at a figure far below its true value.

Diamond attempts to convince an old war buddy who has turned to a life of crime to give himself up to the authorities.