First of three appearances by Jonathan Goldsmith as Sgt Cooper. Goldsmith is a familiar face to fans of vintage television, where he was often billed as Jonathan Lippe. Goldsmith found fame with a new generation as "The Most Interesting Man in the World," a 2008-16 advertising campaign for Dos Equis beer that lives on as a popular meme ("I don't always ... but when I do...").
First of two appearances by popular character actor James Karen as Averell Dawson. He next appears early in the fifth season.