Watch VoirFilms. U.S. Marshal Johnny Mack Brown once again goes undercover in this Nevada Mckenzie series entry from Great Westerns Prod./Monogram. Masquerading as a parson and a drifter, Sandy Hopkins (Raymond Hatton) and Nevada Jack McKenzie (Mack Brown) come to the aid of the beleaguered residents of Goldville, a small ranching community being terrorized by greedy saloon keeper Ace Benton (Kenneth MacDonald) and his gang of cutthroats. Unbeknownst to the citizenry, the railroad is planning to build tracks through town and Benton is attempting to secure the land by scaring off the settlers.