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Sons of the Pioneers is a showcase for?the Sons of the Pioneers, who are reteamed with ex-"Son" Roy Rogers in this budget western. The plot is contingent upon a deposit of rare minerals, vital to the American war effort. The villains want to get their hands on these minerals, and to do so organize themselves into a gang of masked terrorists, bent on chasing everyone else out of the territory. Unable to handle the villains alone, sheriff Gabby Whittaker (Gabby Hayes) sends for Roy Rogers, whose father was a legendary guns-slingin' peacekeeper. Alas, Roy is a shy entymologist who's never handled a gun in his life-but he soon learns how, thereby routing the heavies and striking a blow for Democracy. Pat Brady, a member in good standing of the Sons of the Pioneers, makes the first of many screen appearances as Roy Rogers' comical sidekick.