The crew of the American destroyer escort, the USS Haynes, detects a German U-Boat—resulting in a prolonged, deadly battle of wits.

A giant prehistoric praying mantis, recently freed from the Arctic ice, voraciously preys on American military at the DEW Line and works its way south.

A new social worker at a girls’ reformatory discovers that her charges are being used by a group of ancient alchemists, who have insinuated themselves as the prison’s chief staffers,…