A famed trumpet player is suspected of murdering a blues singer. Using only two minor clues, he narrows the suspects to four people, but only after surviving poison placed on the mouthpiece of his trumpet!
London, 1888: on the night of the third Jack the Ripper killing, soft-spoken Mr. Slade, a research pathologist, takes lodgings with the Harleys, including a gloomy attic room for "experiments." Mrs. Harley finds Slade odd and increasingly suspects the worst; her niece Lily (star of a decidedly Parisian stage revue) finds him interesting and increasingly attractive. Is Lily in danger, or are her mother's suspicions merely a red herring?
A scientist takes the brain of dead man and revives it via electrodes as it lays suspended in a tank of liquid. Soon, the brain grows to possess enormous psychic powers and inflicts its personality upon the doctor who saved it, creating a "Jekyll and Hyde" paradigm.
Roy and Gilbert's fishing trip takes a terrifying turn when the hitchhiker they pick up turns out to be a sociopath on the run from the law. He's killed before, and he lets the two know that as soon as they're no longer useful, he'll kill again. The two friends plot an escape, but the hitchhiker's peculiar physical affliction, an eye that never closes even when he sleeps, makes it impossible for them to tell when they can make a break for it.
In New York's 1880s newspaper district, a dedicated journalist manages to set up his own paper. It is an immediate success but attracts increasing opposition from one of the bigger papers and its newspaper heiress owner.
Canadian World War II veteran John Graham works in London as a code breaker. Tragedy strikes when his pregnant wife, Carol, is accidentally run over by two crooks who are speeding away from the scene of a murder. Haunted, grieving, and thirsting for revenge, Graham sets out to find the two fugitive murderers.
Los Angeles, California. A cop who, unhappy with his job, blames others for his work problems, is assigned to investigate the case of a prowler who stalks the home of a married woman.
A man who is believed to have murdered a woman, escapes from the insane asylum to find if he was the one to actually kill her using the scarf she was wearing.
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.
The Los Angeles police know that Pete Ritchie has been bringing drugs into the city, but they can't pin a single piece of evidence on him. After many botched attempts to get at the crook, they resort to having cop Madeleine go undercover and seduce her way into Ritchie's circle. Before she can get anywhere, she's abducted by Johnny, a government agent posing as a thug. But Johnny and Madeleine have no idea they're on the same side of the law.
A down-and-out student is hired to kill a wealthy woman. When someone else is suspected of the crime, the student taunts police until they realize that they may have to wrong man.
In postwar Vienna, Austria, Holly Martins, a writer of pulp Westerns, arrives penniless as a guest of his childhood chum Harry Lime, only to learn he has died. Martins develops a conspiracy theory after learning of a "third man" present at the time of Harry's death, running into interference from British officer Major Calloway, and falling head-over-heels for Harry's grief-stricken lover, Anna.
Roy Martin aka Roy Morgan is a burglar and former war-time Radio & Electronics Engineer who listens in to radio police calls, allowing him to stay one step ahead of the cops.