The Saturday matinee crowd got two cowboy stars for the price of one in this lavishly budgeted western serial starring former singing cowboy Dick Foran and Buck Jones. The latter contributed deadpan humor to the proceedings, making Jones perhaps the highest paid B-western comedy relief in history. The two heroes defend the Death Valley borax miners from an outlaw gang headed by Wolf Reade. An extraordinarily strong cast -- for a serial, at least -- supported the stars, headed by Charles Bickford as Reade, Leo Carillo, Lon Chaney, Jr., and silent screen star Monte Blue. Leading lady Jeanne Kelly later changed her name to Jean Brooks and starred in the atmospheric RKO thriller The Seventh Victim (1943). Universal claimed to have spent $1 million on this serial and made sure to get their money's worth by endlessly recycling the action footage in serials and B-westerns for years to come.
Kincade and Blake cause a mail plane carrying a payroll to make a forced landing in the desert. When they try to get the money, prospectors Ted and Si drive them away. With the pilot shot, Ted takes over as pilot figuring another attempt will be made and this time the Sheriff will be there.
A breezy young Westerner loves to talk and tells some "whoppers" for humorous purposes. This get him into trouble with his girl, but he wins her back after she has tried vainly to fall in love with an honest but less entertaining fellow.
The California-Yucatan Railroad, being built for the good of Mexico, is under siege by a gang of terrorists hoping to force its sale; no one can prove their connection to profiteer Marsden. Manuel Vega, aged co-owner, calls in the aid of his nephew James, great-grandson of the original Zorro. Alas, James seems more adept at golf than derring-do; but after he arrives, Zorro rides again! Can one black-clad man on horseback defeat a gang supplied with airplanes and machine guns?
Tex Granger heads toward Three Buttes when he comes across a young boy guarding a gold shipment which he has just rescued from a stagecoach that had been held up by Blaze Talbot and Reno
The heartless woman with her partner answered the ranchero's call for a wife. Then the adventuress soon discovered she was not as heartless as she at first imagined. She learned to love and when the other man appeared to perpetrate the infamous design, true woman nature came into the struggle, saving both herself and the ranchero.
Radio star Jack Benny, intending to stay in New York for the summer, is forced by the needling of rival Fred Allen to prove his boasts about roughing it on his (fictitious) Nevada ranch. Meanwhile, singer Joan Cameron, whom Jack's fallen for and offended, is maneuvered by her sisters to the same Nevada town. Jack's losing battle to prove his manhood to Joan means broad slapstick burlesque of Western cliches.
Miller conceives a bitter hatred for Howard, his successful rival for the hand of Ruth, daughter of Colonel Cameron, commandant of a western array post. A party of immigrants, ignorant of Indian customs, destroy some burial scaffolds. The desecration is witnessed by the red men and a desperate battle ensues.