Devil Riders is a 1943 American film directed by Sam Newfield. It was the first film in Producers Releasing Corporation's Billy the Kid film series where Crabbe changed his name to "Billy Carson".
Billy and Fuzzy are in charge of the local branch of the Pony Express. When a stagecoach line comes to town the Pony Express retains the weekly mail delivery contract whilst the stagecoach line takes freight and passengers. When the stagecoach line decides to do a daily mail service Billy and Fuzzy initially welcome the competition. However, two scheming businessman feel the stagecoach line would threaten their wealth and they plot to have the Pony Express and stagecoach line fight each other by each blaming the other for the sabotage done by the henchmen of the businessmen.