Hulking, childlike Arnie Guthrie (Cal Bolder) can't control his temper-and even worse, he doesn't know his own strength. Clumsily attempting to force his attentions upon saloon girl Shari (Karen Sharpe), Arnie is reprimanded by Adam and Joe Cartwright, whereupon he beats up both men! Regarding Arnie as a kindred spirit, Hoss Cartwright (who has likewise been "misunderstood" because of his bulk) tries to befriend Arnie and channel his strength and hostility-with unexpectedly tragic results. Leonard Nimoy appears as a dandified bartender named Freddie, while others in the cast include Rodolfo Hoyos and Charles Tannen. Written by Gene L. Coon, "The Ape" first aired on December 17, 1960. ~ Hal Erickson, Rovi