Marshal Tim Smith is sent to Rawhide to battle rustlers. When the outlaw gang attempts to kill the new Marshal, they get the wrong man. Tim puts his identification on the dead man and poses as a known outlaw. This gets him into the gang where he is given the job of posing as the new Marshal.

Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to create a variety of disasters. Fortunately, he is thwarted repeatedly by three daring circus daredevils.

The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the gold and become Emperor. Francisco was put in charge of a legion to combat the Yaqui tribe and protect the land, but when attacked Zorro came to his rescue. Francisco's partner recognized Zorro as the hidalgo Don Diego Vega, then ask him to take over the fighting legion as his alter-ego Zorro.

Mandrake and his team attempt to prevent "The Wasp" from stealing and using a new Radium invention.

In the midst of the Civil War, Lassiter has a plan to get control of California. Working out of St. Joseph, he plans to send forged messages to the troops on the west coast via Pony Express. First he attempts to bribe Pony Express ride Roy Rogers. When Roy refuses he turns to the outlaw Johnson and his gang and this leads to trouble.

Steady, dependable Coast Guard Lieutenant Raymond "Ray" Dower and reckless aviator Thomas "Speed" Bradshaw are the closest of friends. Ray saves the life of Captain Tobias Bliss, tramp steamer skipper, in a daring rescue at sea. Speed flies the injured man back to the base hospital, where the two officers later visit him. There Ray meets Nancy Bliss, Bliss' grand-daughter, and falls in love with her. Speed meets her at a dance and urges Ray to propose before some other guy does. Ray is assigned to flood rescue duty, and Speed and Nancy start going out together and discover they are in love.

Wild Bill Saunders recruits a team of paroled convicts to subdue a lawless gang.

When Matt Kilgore and his men frame and then hang an innocent man, Lige Saunders sends for his son Wild Bill Saunders who arrives to find his father shot by Matt's brother. When the brother is killed in his fight with Bill, Matt sends two fake Deputies to arrest Bill whom he then plans to hang. But Matt's sister, attracted to Bill, overhears the plan and rides for help.