An American doctor and his wife, a former singing star, witness a murder while vacationing in Morocco, and are drawn into a twisting plot of international intrigue when their young son is kidnapped.

A man and wife are terrorized by Mad Scientist Dr. Callistratus who was executed but has returned to life with a heart transplant. Along with his crippled assistant Carl, the 'anemic' Mad Scientist, believed to be a vampire, conducts blood deficiency research on the inmates of a prison hospital for the criminally insane to sustain his return to life.

A serial killer is murdering women in the Whitechapel district of London. An American policeman is brought in to help Scotland Yard solve the case.

A woman reporter discovers a former lover and intelligence officer during WWII apparently working as a waiter in a hotel; and, believing something she impulsively did while he was on a mission is responsible for his current situation, sets out to make things better by finding a foreign agent known only as Kupchek, with the help of the hotel's detective.

Everyone in a large department store knows that a rising star is married to the owner's daughter, except her husband.