Un journaliste découvre les travaux d'un scientifique fou, exposant des enfants à des rayons gamma, en pensant développer chez eux, une intelligence supérieure. Les résultats et conséquences sont en fait fort dramatiques...
John Nordley embarque un certain M. Anselm à destination des Pays-Bas, mais alors que le bateau approche de la côte, il trouve son passager mort dans sa cabine. Il va bientôt apprendre que cet homme était en fait un inspecteur de la police de La Haye et se retrouver impliqué dans une histoire de trésor nazi se trouvant au fond de la mer...
While in London trying to nab several fugitives who stole a million dollars from a U.S. Treasury vault, American federal agent Dennison (Dennis O'Keefe) assists Scotland Yard Insp. McClaren (Philip Friend) in his search for a missing atomic scientist (Paul Hardtmuth). The detective duo discovers that the key to solving both cases may rest with the scientist's daughter (Margaret Sheridan) and her fascinating diamond.
An American army officer working for British intelligence comes to post-war Berlin to solve a murder. His investigation is compromised when he falls for a nightclub singer, not realising she is an agent of the criminal mastermind he is on the trail of.
An atomic scientist is found floating in a river with a bullet in his back and a radioactive halo around his body. The radioactivity has put him seven-and-a-half seconds ahead of us in time. He teams up with a reporter to stop his evil double from destroying his experiments in artificial tungsten.
A saloon owner falls in love with the abused wife of a heavy gambler. He is snared into a web of intrigue when an ex-girlfriend is found murdered in his apartment.
Steve Stratton (Macdonald Carey) is a hardboiled hunter who catches and keeps wild animals in an African sanctuary in order to sell them to zoos and circuses. When he hires a new veterinarian named "P.J. Muir," he does not imagine that the "P" stands for Pamela, played by the gorgeous Rhonda Fleming!
In a Swiss Alpine resort shortly after the War an army officer and upper-class Humpy Miller both set their sights on Mary, the landlord's daughter. When the two come down with chicken pox they are put in the charge of fellow guest Miss Cartwright, who turns out to be Humpy's old nanny. The two Englishmen unite not only against her tyranny but against a dense Greek who is also after Mary.
Des villageois des Cornouailles disparaissent un à un, jusqu'à ce qu'ils soient enfin localisés dans le laboratoire d'un mystérieux médecin qui se livre à de monstrueuses et morbides manipulations...
Bedelia Carrington is living happily, it appears, in Monte Carlo with her husband Charlie Carrington. But a cultivated young artist, Ben Chaney, begins probing into her past with curious concern. Chaney, who is really a detective, learns that Bedelia's obsession for money has led her, in the past, to husband-poisoning for the insurance money.