Bonanza S01E17 - The Outcast

The Cartwrights come to the aid of Leta Malvet when she is ostracized by the community after her father and brother are hanged by a lynch mob for killing two men while trying to rob the stagecoach that they thought carried the Ponderosa's payroll. But Adam is sure that the gang will try again when they find out that the Malvets came up empty-handed and suspects that it's no coincidence when Leta's beau, bad boy Clay Renton, comes back to town.