Cosmo Jones, a correspondence-school detective from a small town, comes to the big city to offer his services to the police. He happens by where a gangster is killed by an opposing gang. Socialite Phyllis Blake is running around with gang member Tom and the opposing gang plan on kidnapping her. Cosmo is with Sergeant Flanagan when the attempt is made in front of a night club, where a bystander is seriously wounded in the gun-battle. Police Chief Murphy blames Flanagan for the shooting and demotes him. Cosmo, with the aid of a porter, Eustace and Flanagan's fiancée, Susan, tries to find the killer. Phyllis is finally kidnapped and Cosmo decides the act was committed by one of the two gangs. He has her father place an ad in the newspaper that contact has been made with the kidnappers. Each gang thinks the other is pulling a double cross, and one gang wipes out the other.
A private detective and his assistant are hired to find a missing husband by the detective's former girlfriend who dumped him. The case is quickly complicated by a sexy brunette, a missing bank executive, a castle in the desert, and a dead body with its "head blown off" but identified as the husband.
In a series of flashbacks, shows that attorney John Morland has given a lift to a hitchhiker who turns out to be a murderer. As a result, Morland himself is implicated in a killing. A pair of detectives discover that Morland has been having business problems and no end of difficulties with his wife Catherine. The trail of clues leads to a surprising revelation.
An ex-cop is suspected of murder after he is found with a dead woman. The private detective is on the run -- attempting to prove his innocence.
A private detective is hired to find a young heiress but finds himself accused of murder.
Newspaper reporter Michael Ward plunges into a nightmare of guilt, fearing that his "evidence" has sentenced the wrong man to death.
A drifter claims the money in an old bank account. Soon he finds himself the target of two men who turn out to be the sons of the man's old partner, who is now in prison because of a conflict with him over the money in that account.
A woman uses a deck of cards to predict death within 24 hours for a stranger sitting at a bar, then tries to help him remember who he is based on items in his pockets.
A guilt-ridden man blames himself for his wife's death and secretly pays an assassin to kill him. But then he finds out that his wife isn't dead at all. And now the assassin is on his trail, with no way to call off the hit.
Alex Ritt, a music video director comes to Italy to direct a video for pop sensation Stefania Stella. He soon encounters a mysterious killer who videotapes his victims for the police. As the horrible murders continue, Ritt is unknowingly pushed into the killer's games and he soon becomes a target of the police. The video-killer is on the loose and Ritt must find out the truth before it's too late.
Frank Johnson, a sole witness to a gangland murder, goes into hiding and is trailed by Police Inspector Ferris, on the theory that Frank is trying to escape from possible retaliation. Frank's wife, Eleanor, suspects he is actually running away from their unsuccessful marriage. Aided by a newspaperman, Danny Leggett, Eleanor sets out to locate her husband. The killer is also looking for him, and keeps close tabs on Eleanor.
Jim Hanvey is a genial but top-notch detective who has retired to his country home. An insurance company hires him to find a missing emerald so they won't have to pay out the $100,000 for which the jewel is insured. It doesn't take him long to find the emerald, but he discovers that finding it was the easy part; the difficult part is getting it back to its rightful owner, and he winds up involved in a murder in which an innocent man is framed.
Secret Service agents make a deal with a counterfeiting inmate to be released on early parole if he will help them recover some bogus moneymaking plates, but he plans to double-cross them.
Mr. Dean's body is found face down in the fireplace, burned beyond recognition. Nightclub-singer Eden Lane is convicted of the crime. She is escorted to prison by one of the arresting detectives when she convinces him that she just spotted the murderer outside their train.
When it rains in the city, a serial killer known as "The Judge" looks for his next strangling victim. For months, the madman has been stalking at night, leaving behind clues, but police efforts have been fruitless. Constructing a life-size dummy of the murderer, police Lt. Harry Grant is growing obsessed with capturing him, and always following Grant is the relentless reporter Ann Gorman looking to break the story, but the hunt continues.
Mary Henry ends up the sole survivor of a fatal car accident through mysterious circumstances. Trying to put the incident behind her, she moves to Utah and takes a job as a church organist. But her fresh start is interrupted by visions of a fiendish man. As the visions begin to occur more frequently, Mary finds herself drawn to the deserted carnival on the outskirts of town. The strangely alluring carnival may hold the secret to her tragic past.
Five college students embark on a paranormal investigation of Dead Woman’s Hollow Road, a hub of mysterious deaths and strange phenomena along the Appalachian Trail. The probe turns deadly when people in their camp begin dying. For those still alive, their only hope for survival is a wet behind the ears Sheriff who must come to terms with the fact that the darkness surrounding his quiet town isn’t supernatural, but an evil that’s very real.
A young man who steals valuable Oriental objects for a crooked antique dealer is hunted down by the police after his latest Chinatown robbery turns violent.
Detective Inspector Campbell (Gordon Jackson) looks into the murder of a teacher at a girls school where there are a number of suspects, including her colleagues and the married man she had been seeing.
An adolescent believes that his widowed mother's suitor may have murdered his father.