A visit from an attractive blonde sporting a black eye leads to a case concerning a wealthy man's long-lost grandson and murder.
Madame Selena, operator of a wax museum, predicts deaths that come true. When Mr. White disappears, Superman investigates.
The Von Klaven twins steal a million-dollar radium core from the U.S. Medical Corps. When one brother is murdered, Superman cracks the case and brings the other to justice.
Looking for Incan treasure, Lois and Jimmy are seized by desperate gunmen.
A "killing fog" and a strange sea monster drive people away from their village. A druggist and his son have discovered a deposit of hydrozite, an element of the hydrogen bomb.