The Gene Autry Show (1950) : 1x13

Gene and Pat are called in to track down the ""Black Rider"", an outlaw who wears a black suit and hat. The outlaw is terrorizing the town, and plans revenge on the town for an execution of a killer. The sheriff is wounded, and Gene assumes the job. As it turns out, the Black Rider is a woman! Pat discovers this, and rides to tell Gene, who sneaks over to the outlaw's property. Gene (with the sort of help from Pat), Gene is able to capture this Black Rider when she doesn't expect it.