Detective Barker has his work cut out for him when his red-haired nanny, Kate Blond, turns out to be a master thief in disguise. Barker’s close friends are a wealthy count and countess who has recently purchased a valuable piece of jewellery at an auction. With a poisoned sewing needle, Kate knocks the countess out and steals the jewellery. She sets the countess’ clock back an hour so the nanny-job is a bulletproof alibi when Barker investigates the case. Barker is at a loss until his trained eyes spot a red hair at the crime scene. (Stumfilm.uk)
A European royal couple come to New York to sell some of the royal family's crown jewels. A gang of international jewel thieves is planning to steal the gems, so a private detective is assigned to guard them. Unfortunately the private eye turns out to be a bumbling, inept fool--or so everyone thinks.
Spendthrift Willie Hale again returns penniless to the family home in London. His father is none too pleased, but Willie smooth-talks him into letting him stay. At the same time he turns the charm on Dorothy Hope, whose father is big in linoleum and who, before Willie's arrival, was about to become engaged to a Russian aristocrat.
A lovely dame with dangerous lies employs the services of a private detective, who is quickly caught up in the mystery and intrigue of a statuette known as the Maltese Falcon.
Scion of the once-rich Mitchell family, Herbert Wynn is found shot to death. Nurse Adams, bored by hospital routine, is recruited by the police to ferret out clues as she tends to Wynn's elderly aunt Julia. Jokingly given the 'rank' of Miss Pinkerton, after the famous detective agency, Adams probes into the mystery, but not before a second death.
A private eye specializing in divorce cases falls for the woman he's been hired to frame.
A former government agent in France, who has failed at an assignment and been disavowed, is deported back to the USA, where he can only find work at a low-rent detective agency. He soon gets involved with a woman with ties to a crooked gambling club owner, who is a client of his agency.
Carol feels, for whatever reason, that her husband, John, has grown indifferent to her, and is on a quest to find out why, suspecting another woman. She sees the family physician, Dr. Swope, first and then hires a private detective. Her own sleuthing is more effective and she devises a plan; having long been pursued by Eric, she apparently accedes and accompanies him to an apartment and, per her plan, enter the wrong one. There, they find Carol's best friend, Charlotte, and John hiding in a closet. The latter, showing more nerve than good sense, goes into a rage and berates Carol for her apparent philandering. The battle continues at home, where their daughter Janet informs them that because of them, she and Paul have given up on the idea of marriage, but are going away together, anyway. Carol and John trail them to a hotel and find them in twin beds, whereupon John, armed with a fire-ax, summons a justice of the peace and demands a fire-ax version of a shotgun wedding.
A dancing gigolo gets involved with a wealthy lady and her young step-daughter, and murder is the result.
En tidligere detektiv og hans kone bliver blandet ind i eftersøgningen af en forsvundet opfinder, hvor alle har et motiv.
Wonderful idea to give a party with people who dislike each other. Late at night, everyone decides to go into the pool, except Stamm, who is drunk. Montague dives in as does Greeff and Leland, but only Greeff and Leland come out. Montague is no where to be found so Leland suspects foul play and calls the cops. Luckily, Philo is with the D.A. and comes along, but they do not find Montague. When they drain the pool the next day, they find nothing except what looks like dragon prints. Philo has his suspicions and tries to piece the clues together to find out what has happened.
Private detective Donegal Dawn is summoned by the police commissioner to solve the reasons for a crime wave in Chinatown.
"Mitch" Mitchell is an aviator who has been hired to take a child in a guardianship suit out of California into Mexico. He is accompanied by Maxine Rush, the secretary of the head of a private-detective agency who has been hired to care for the kid until the suit is over. (Overview written by Les Adams )
Famous private detective Tip O'Neil is summoned by telegram to the estate of old friend Paul Harding, but finds the telegram was sent by Paul's attractive secretary, Amy Hutchins. Paul admits his dog was shot by extortionists to show they mean business, and shows Tip some threatening notes they sent. That night, Paul's ward, Corinne, is kidnapped by two gangsters and her driver is found dead the next morning. The kidnappers contact Tip demanding $200,000, which is delivered according to instructions. Awaiting the return of Corrine, Tip learns her fiancé, Gene Leland, is an ex-convict, and he also investigates why a thug, Maratti, was found prowling around the grounds, and why Paul's brother-in-law, Jim Glenray, was seen leaving the estate late the night before. And when the chauffeur is murdered with Amy's gun as he was about to confess some complicity, Tip has to piece together various clues to pinpoint the culprits.
A doctor is driven into an investigation of sinister goings-on at a horse race track by his mystery writer ex-wife.
In the second screen version of The Maltese Falcon, a detective is caught between a lying seductress and a lady jewel thief.
Den fordrukne privatdetektiv Nick og hans society-kone Nora bliver indblandet i en mordsag, da Nicks kusines mand forsvinder. Manden har haft en affære med en sangerinde og rodet lidt med noget pengeafpresning. Sammen med hjælperen David forsøger Nick og Nora at løse mysteriet.
A detective must solve a case where a girl was murdered in a room--and all the doors and windows were locked from the inside.
Detective James Lee Wong must find the "Eye of the Daughter of the Moon," a priceless but cursed sapphire stolen in China and smuggled to America. His search takes him into the heart of Chinatown and to the dreaded "House of Hate" to find the deadly gem before it can kill again.
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.