Call of the Canyon was the third and final Gene Autry film featuring the Sons of the Pioneers, preceded by The Big Show and The Old Corral (1936).
The film features an uncredited and unshaven Roy Rogers as the leader of the O'Keefe Brothers, played by the singing Sons of the Pioneers, a troupe of western singers trying to break into radio.
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Sixteen months after The Old Corral was released, Roy Rogers starred in his first feature film, Under Western Stars.
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The bus is held up by the O'Keefe Brothers (Sons of the Pioneers), a local aspiring singing troupe seeking publicity.
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