A group of people find themselves trapped in a creepy mansion, complete with secret passageways, a mad doctor and a murderous gorilla.
A nightclub dancer (Sally Rand) seeks vengeance for the murder of her father.
A strangler is loose on a British estate, and he not only strangles his victims but brands an "M" onto their foreheads before he decapitates them.
A man known to be a mute is suspected of committing a murder, as he was noticed at the scene. However, witnesses saw and heard him talking as he was leaving the scene of the crime. The police must determine if he is the actual killer or if he is being framed.
An amateur criminologist and his college student son work together to solve the campus murder of the brother of the son's girlfriend, and thereafter two other students as well.
Lamont Cranston, aka The Shadow, investigates the murder of a New Orleans bandleader.
The second and final Grand National Pictures film to feature The Shadow, played again by Rod La Rocque. In this version, Lamont Cranston is an amateur detective and host of a radio show with his assistant Phoebe (not Margo) Lane. Cabbie Moe Shrevnitz and Commissioner Weston also appear.
Lamont Cranston assumes his secret identity as "The Shadow", to break up an attempted robbery at an attorney's office. When the police search the scene, Cranston must assume the identity of the attorney. Before he can leave, a phone call summons the attorney to the home of Delthern, a wealthy client, who wants a new will drawn up. As Cranston meets with him, Delthern is suddenly shot, and Cranston is quickly caught up in a new mystery.
A colonial police detective in an Eastern seaport seeks a stolen gem, and infiltrates the underworld by posing as a look-alike wharfside bar owner.
A mad killer is on the loose in a hotel on a dark, gloomy night.
A millionaire with a crumbling personal life comes up with an idea on how he can disappear, start a new life without anyone knowing who he is and be able to take all his money with him.
A woman's painted portrait and a post card with a sketch of a woman's hand holding a Chianti bottle are the main clues used by the Scotland Yard to solve a string of murders connected to a diamond-smuggling ring.

A theatre critic (Dave O'Brien) teams up with a cop (Jack Mulhall) to investigate the murder of a Broadway actor.

Aircraft are being shot down by a large black plane with a big "X" painted on the wing. The chief suspects are invited for the weekend to an old dark mansion.

Guests at a luxury hotel are horrified when they witness a man literally "disappear into thin air." The vanished man's relatives hire a detective, who goes to the hotel to investigate the disappearance.

A newly hired police chief vows to clean up a notoriously corrupt police department. When he is murdered, investigators find that there is no shortage of suspects, most of them being fellow cops.
An eccentric millionaire, unable to locate his only granddaughter, decides to divide his estate among a group of people less close to him: his niece and nephew, his attorney, his doctor, and his housekeeper. But complications and murder arise when two different women turn up, claiming to be the granddaughter.
An insurance investigator arrives at a creepy mansion to protect a millionaire who has had death threats made against him.

A famous detective is invited to a swanky party at an elegant mansion, but before the night is over he finds himself involved with gangsters, blackmail and murder.

In a cheap hotel-room in New York City Jelke shoots gangster Joe Wells, takes a package from his pocket and flees.Wells staggers into an alley. On her way to her apartment above a wax museum, Sue Gallagher, a reporter for the Chronicle, finds Wells' body and hides his corpse among the wax-figures in the museum and calls her paper to send a photographer so she can get a scoop on the killing of Wells, who had a $5,000 reward for his capture, dead or alive. Meanwhile, Henry Miggs, the museum owner find the body and is ready to call the police but his handyman, Clutch Tracy tells him to conceal it and avoid suspicion. From this point on it is a game of where-is-the-body....and the stolen South American diamonds Wells was carrying.
Police try to solve a murder on board an ocean liner.
When a city councilman is murdered while investigating allegations of drug dealing going on a a somewhat disreputable sideshow, the daughter of the chief suspect teams up with a newspaper reporter to find the real killer.
A valuable gem from India is stolen in an old dark mansion and it is up to Scotland Yard inspector Charles Irwin to find out who did it among all the suspects who were in the house.
The Phantom Robber gets a fortune in jewels and some valuable papers from a robbery on the crack train "The Midnight Limited" and Val Lennon and his pretty assistant, Joan Marshall, are on his trail. But the Phantom strikes three more times and adds murder to his list. Val decides to use himself as bait, although Chief Harrigan and Joan beg him not to risk his life. But Val, disguised as a wealthy Canadian, boards the train for a rendezvous with a killer.
An estranged wife shows up after a nearly 7 year disappearance to prevent her husband from marrying his new love, and someone kills her.
In this detective story, a super sleuth is hired by an insurance company to find a stolen emerald belonging to a rich man's daughter. He soon discovers that the theft was a hoax precipitated by the girl's boyfriend, an aspiring novelist doing research for his forthcoming novel. Real trouble ensues when the gem really is taken. Again the detective begins investigating. He soon discovers that the crook is an official at the insurance company.
An ancient curse and a killer ape are contained inside an old dark mansion.
Ellery Queen sets out to solve a mystery involving a valuable stamp.
A private detective finds himself with a perfect new secretary. But after a notorious gossip columnist turns up murdered, she may prove too good to be true.
To protect a young woman's life, a man pretends to be her injured friend so he can investigate a murder and capture the killers.
Sexton Blake and Tinker foil criminal plot connected with the Tongs, and master-minded by "famous stamp collector" and millionaire.
A boxer is killed in the ring, and the only clue is a tune that a man was whistling.
During a stormy night at an old dark mansion, people who claim to see ghosts roaming the halls are later found murdered.
Tale of a blind detective (Edward Arnold) who tries to outwit Nazi spies and to solve a murder.
An inventor recently released from prison invites a group of former business associates to a holiday in his island home, intending to exact revenge on them.
A pair of detectives investigates the murder of an elderly millionaire who was the target of blackmail and death threats and find that there is no shortage of suspects, many of them in the victim's own family.
A female reporter goes undercover to investigate the series of mysterious disappearances of young women, who were all linked to a local drama school.

Dick Tracy investigates the theft of a fortune of fur coats, a possible insurance swindle and several murders, all linked to a huge thug who wears a hook in place of his right hand.

Police detective Dick Tracy must identify and apprehend a serial killer known as Splitface.

Captain Drummond is travelling to Switzerland to marry his girlfriend. However, when a cargo containing dangerous explosives goes missing from its place, Drummond is forced to delay his plans.

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