The best Melvyn Douglas’s mystery movies

A popular singer, Marian Washburn, suddenly and unexplainably loses her voice, causing a shake-up at the club where she works. Her worried but loyal piano player, Luke Jordan, helps to promote a new, younger singer, Susan Caldwell, to temporarily replace Marian. Susan finds some early acclaim but decides to leave the club after a few performances. Soon after Susan quits, she is gunned down, and Marian quickly becomes a suspect.

Kenny Williams, a lieutenant on the homicide squad, is engaged to Maxine Carroll, the Mayor's secretary. Or isn't he rather married with his job? For each time he has a date with his longtime fiancée, he is prevented from keeping it by his devotion to duty. Maxine, in desperation, decides to take action and bring Kenny to the altar. Who will win, Maxine's curves or the glorious fight against crime?

A newspaper editor turns a kidnapping into the banner headlines and exclusive story that could save his publication.

A woman and a man vying for a woman's affection: the usual love trio? Not quite so since the belle in question is Lorraine de Grissac, a very wealthy and alluring society woman, while one of the two rivals is none other than Arsène Lupin, the notorious jewel thief everybody thought dead, now living under the assumed name of René Farrand. As for the other suitor he is an American, a former F.B.I. sleuth turned private eye by the name of Steve Emerson. Steve not only suspects Farrand of being Lupin but when someone attempts to steal a precious emerald necklace from Lorraine's uncle, Count de Brissac, he is persuaded Lupin is the culprit. Is Emerson right or wrong? Which of the two men will win over Lorraine's heart?

Married book-dealers Joel and Garda Sloane try to clear a friend in the murder of a rival book-seller.

Once a jewel thief always a jewel thief? Yes and no. Yes if you consider the fact that Michael Lanyard also known as the Lone Wolf once retired from the "trade" but relapses back into his old habits when he is tempted by the emerald pendant of beautiful socialite Marcia Stewart. The trouble (?) is that he falls for the belle and he soon gets more interested in getting the girl than the jewels that adorn her. What he wants now is to return the pendant but a rival gang interfere and force him to take part in a big-time caper.

An investigator for the District Attorney's office quits to open his own detective agency. However, business is so bad that he finally decides to give it up and go back to his old job. As his wife is at his office closing up, a wealthy society matron walks in with a case: she wants to know if her husband is having an affair with his ex-girlfriend, who is now married. The wife accepts what looks to be an easy case, figuring than she can then persuade her husband to re-start the agency. However, when the client's husband is found murdered, she decides to investigate the murder herself. Her husband has also been assigned by the D.A. to investigate the murder, and he doesn't know that his wife is also on the case. Complications ensue.