A murderous gang of counterfeiters has kidnapped the government's best engraver and is forcing him to print virtually undetectable phony money. The Secret Service sends its toughest agent, Jack Holt, and a female partner after the gang.

Police detectives battle the League of Murdered Men, a gang of resurrected dead criminals.

A master criminal called The Spider puts the famous detective's brother under a hypnotic spell and turns him against Dick.

A scientist discovers a formula for making synthetic gold.

A gambling ring run out of the Mogul Taxi company is intent on fixing college football games. Football star Harold "Red" Grange is a target for the gamblers, whose thugs try to eliminate Grange from playing. Grange's buddy Buddy is himself vulnerable to blackmail, since he has broken team rules by marrying. The crooks use all their wiles to keep Grange and Buddy from leading their team to victory.

When his father is killed in a train wreck, Larry Baker vows to unmask a mysterious criminal called "The Wrecker," who has targeted the L&M Railroad for deadly" accidents."

A 15 episode serial in which Blake battles the "Scorpion" over possession of a 'death ray' machine.