Professor Luckman
After being thrown out of medical school for ethical violations, Dr. Peter Blood returns home to a small Cornish village, where he sets up a research laboratory in a secluded cave. There, he attempts to revive the dead, using kidnapped humans -- who he views as unworthy of life -- for their body parts, specifically, their hearts.
Prof. Bernstein
Condenado a muerte por una serie de crímenes que no ha cometido, el Barón Victor Frankenstein trata en vano de explicar a sus carceleros que el autor de esas muertes es un monstruoso ser, creado por él en su laboratorio secreto. Su diabólica ambición de crear vida llevó a Frankenstein a desafiar a Dios, fabricando un ser abominable a partir de cadáveres.
Dr. Buchmann
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.
Mohammed
Steve Stratton (Macdonald Carey) es un cazador duro que atrapa y guarda animales salvajes en un santuario africano para venderlos a zoológicos y circos. Cuando contrata a un nuevo veterinario llamado "P.J. Muir", no se imagina que la "P" representa a Pamela, interpretada por la hermosa Rhonda Fleming.
Porter
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.
Dr. Bressler
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.
V. H. Mayall
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.
Priest
Frances es una reputada entomóloga que, debido a sus grandes conocimientos sobre virus y bacterias, es requerida por el servicio secreto británico para realizar una peligrosa misión. Debe viajar a un país imaginario de los Balcanes e investigar un nuevo tipo de armas bacteriológicas que supuestamente está desarrollando el enemigo.
German Mayor (uncredited)
Un capitán de los servicios de contraespionaje francés se ve obligado a disfrazarse de mujer para convertirse en la esposa de un teniente americano.
Old Frenchman
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.
