Sun Valley Cyclone

Red Ryder and Little Beaver ride into a sleepy Arizona town, and are seen by Blackie Blake. Red and his young Indian pal go to the office of Marshal McGaw and Blake sneaks up to a window and is about to shoot Red from ambush, but "Thunder", Red's horse, bears down on him with pounding hoofs. The hostile townspeople gather and are bent upon carrying out the law that says a killer horse must be shot.