In "Duel at Parkison Town" (December 13, 1960), Henry Hull guest starred as Ben Parkison, an embittered rancher who challenges Slim Sherman to a duel after Parkison's younger son accidentally kills himself on Sherman ranch land while stealing a calf. Ron Harper portrays the other Parkison son, Tom. The episode reveals that the Parksions and Shermans had many past disagreements that had resulted in a feud, but Slim had thought that the two families, now reduced in number, could live in peace.