The best Donald Douglas’s mystery movies

Gumshoe Philip Marlowe is hired by the oafish Moose Malloy to track down his former girlfriend. He's also hired to accompany an effeminate playboy buy back some jewels. When the exchange results in the playboy's murder, Marlowe can't leave the case alone, and soon discovers it's related to Malloy's. As he gets drawn deeper into a complex web of intrigue by a mysterious blonde, the detective finds his own life in increasing jeopardy.

When a teenager's father is accused of murder, the boy and his high-school classmates set out to find the real killer.

Private eye Mike Shayne encounters a large amount of trouble while attempting to guard a murder witness.

Philo is in Vienna working for the US Government to see if Archer Coe is selling aircraft designs to foreign powers. He grabs the plans with Archer's signature, but is captured by police before he can escape. Deported he comes back to America and plans to confront Archer, but Archer is found dead in his locked bedroom with a gun in his hand. While it looks like a suicide, Vance knows better and the coroner finds that Archer has been shot, hit with a blunt instrument and stabbed - making suicide unlikely. But Vance is on the case and is looking to see if government secrets have been sold and who has murdered Coe. This is a remake of "The Kennel Murder Case" using aircraft designs and espionage instead of Chinese porcelain and dog shows.

Charlie impersonates an employee of the U.S. government to foil an espionage plot which would destroy part of the Panama Canal, trapping a Navy fleet on its way to the Pacific after maneuvers in the Atlantic.

A doctor (Tom Neal) answers a suicide call in a Latin nightclub.

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

In Puerto Rico to investigate a glut of contraband diamonds that are flooding the world's jewel market, Mr. Moto and his sidekick, a wrestler, find themselves involved in murders by thrown daggers, the frame-up of an overstressed Army colonel, and a pirate gang led by an unknown boss who has inside knowledge of the ensuing investigation.

The operators of 'Silver Haven', a cultish group bilking gullible rich people out of money, is set to inherit a large sum after the deceased woman's heir also dies. Leader Joesph Jones decides to hurry the process along and kidnaps Wally Benton, his fiancé, and a friend, to further this goal. Wally, 'The Fox', is a radio sleuth who solves murders on the air. Jones wants him to devise a perfect murder, and isn't above killing others sloppily along the way to get his foolproof murder plot.

When a Texas playboy is murdered in a New York City nightclub the Falcon investigates. When he learns that the victim was slipped rattlesnake venom, the trail leads to Texas, his own kidnapping and near death.

A treasure map in four pieces, the ghost of a hanged pirate, a talking parrot, and a ship full of red herrings complicate Charlie's search for a murderer on board a docked ship.

A rare-book dealer (Robert Montgomery) and his wife (Rosalind Russell) tie murder to the theft of a Shakespeare manuscript.

A reporter and a police detective sort through the clues in a night-club owner's murder.

An eccentric wealthy man is murdered, and the police set out to find his killer.

A nightclub dancer (Rita Hayworth) and a detective (Charles Quigley) catch the gangster (Marc Lawrence) who framed her brother.

The title character, played by Edmund Lowe, is a famous magician who fakes his own death -- then reappears as his nonexistent twin brother. It's all part of Gregory's master scheme to pin his "murder" on innocent John Randall (Don Douglas), the husband of Ellen (Jean Rogers), the woman Gregory loves.