Cpl. Randolph Agarn is Sergeant Morgan O'Rourke's dimwitted sidekick and business partner in the illegal O'Rourke Enterprises scheme. Originally from Passaic, New Jersey, Agarn's name is a play on both Randolph Scott and John Agar. The episode El Diabolo features his Mexican bandit cousin who, like all the other members of his family, looks exactly like him. One running gag during the second season involves Agarn's delayed reactions, which usually ran: Agarn would make a suggestion; O'Rourke would respond: Agarn, I don't know why everyone says you're so dumb! At the beginning of the next scene (which could be several hours or days after the original comment), Agarn, suddenly indignant, demands: Who says I'm dumb?! Like O'Rourke, Agarn apparently spent the Civil War years at Fort Courage. Confrontational and often overly-emotional, Agarn frequently collapses in tears with the phrases Oh, Cap'n! or Oh, Sarge! (depending on whose chest he buries his head in). Whenever he becomes frustrated by something one of the troopers does wrong (which is often), short-tempered Agarn hits him with his hat. (Larry Storch was nominated for an Emmy Award for Outstanding performance by an actor in a leading role in a comedy series in 1967.)