Harry Antrim, who plays Doc Wilson in this episode, passed away 42 days before this episode aired. It was his last acting performance. He was known for playing Fred Walker, Ellie Walker's uncle, on The Andy Griffith Show (1960).
Eb says the Beverly Hillbillies script he has says on the cover it was written by Paul Henning, and that Mr. Henning gave him permission to rewrite it as he saw fit. Paul Henning is the real creator and executive producer of The Beverly Hillbillies (1962), and also the executive producer of Green Acres.
In this episode "The Beverly Hillbillies" is a television series watched by the residents of Hooterville. In a couple other episodes, Eb is shown watching the show, and even says it's his favorite show. Two years later, that TV series becomes a "reality" in a sort of reverse fourth wall break, as in several episodes of The Beverly Hillbillies show, the Clampetts visit Hooterville as friends and relatives of the residents, and Eb, Sam Drucker, and other Hooterville residents visit the Clampetts in Beverly Hills.
The three plays Eb mentions as those his theater group was considering for production were already Hollywood movies by 1967: Romeo and Juliet (1936), Death of a Salesman (1951), and Ah Wilderness! (1935).
Oliver sarcastically compares Eb to Richard Burton, the Oxford educated English actor twice married to Elizabeth Taylor. Eb suggests he should be treated more like Dean Martin, the singer/actor/comedian who had his own variety show on TV in the 1960s: The Dean Martin Show (1965).