Hoss Cartwright is forced to kill neighboring farmer Willie Twilight (Keith Richards) in self-defense, whereupon Willie's brother Red (Adam Williams) promises to get even. When Hoss is shot in the back, it is Little Joe's turn to swear vengeance against Red. Beverly Tyler rounds out the guest cast as Mary, who is caught in the middle of the hostilities. First telecast February 11, 1961, "Vengeance" was written by Marion Parsonnet. ~ Hal Erickson, Rovi