A private detective tries to find out how and why some convicts have mysteriously disappeared from the prison of Dartmoor.

U.S. spies catch a Moscow-born U.S. citizen helping spies, and they force him to counterspy.

Dr. Mabuse and his accomplices steal all kinds of attributes from a National Research Institute (including female staff members) in order to complete his own evil mind-control ray. Dr. Mabuse has this impressive and horribly scarred man-monster that kills for him while the entire police force desperately tries to catch him.

A German expedition is in the African jungles on an unidentified misson. During this mission one of the German explorers, Thoren, is attacked and captured by the local natives called the Botos.

The sequel to 1956's "Liane, Jungle Goddess" finds the title character still a jungle goddess, but captured by slave traders.