With his assistant, Laura Hutchinson, Dr. David Conway develops a device to advance the fledgling science of earthquake prediction. After forecasting a large trembleor that will rock California within twenty-four hours, Conway cannot persuade the Governor to act. When the prediction proves true and further tests indicate that there are more quakes to come, Conway and Laura seek to perfect their device. Subsequent tests deep within Carlsbad Caverns discover an unknown element—E-112—that is responsible for the earthquakes and threatens to destroy the globe if it ever reaches the surface. The team determines that with only four weeks until Armageddon, the race is on to neutralize the killer element before it takes a devastating toll.

A chronic runaway bride is haunted by her conscience, who becomes reality.

A man returns to his home -- a post Civil-War village -- and finds the law is in the hands of a few scrupulous people.

A private eye and her sidekick solve the case of a dead client.

Jungle Jim fights enemy agents who are trying to steal cobalt while disguised as crocodiles.

John Hoyt plays a high-ranking Nazi being prosecuted by an army tribunal in the aftermath of World War II. Sentenced to death, the general appeals to the American investigating Major (Ray Milland), claiming mitigating circumstances, and providing the names of witnesses who will clear his name. This sends the Major in a search through the ruins of post-war Germany to determine the degree of the general's guilt.

A security leak is found at a Southern California atomic plant. The authorities stand in fear that the information leaked would go to a hostile nation. To investigate the case more efficiently, Dan O'Hara, an FBI agent, and Philip Grayson, a Scotland Yard sleuth, join forces. Will they manage to stop the spy ring from achieving their aim?

The story picks up at the point where "The Robe" ends, following the martyrdom of Diana and Marcellus. Christ's robe is conveyed to Peter for safe-keeping, but the emperor Caligula wants it back to benefit from its powers. Marcellus' former slave Demetrius seeks to prevent this, and catches the eye of Messalina, wife to Caligula's uncle Claudius. Messalina tempts Demetrius, he winds up fighting in the arena, and wavers in his faith.

A war veteran suffering from amnesia, returns to Los Angeles from a San Francisco veterans hospital hoping to learn who he is and discovers his criminal past.