Jethro brings home a friend from school, Armstrong Dueser McHugh III, who is coddled by a chauffeur who treats him as frail. The Clampetts know better, and show him a good time, friendship and family.

An unemployed actor named J.D. Clampett and his wife benefit from a paperwork mixup at the bank, becoming $36 million richer. The Clampetts believe that Mr. Drysdale has forsaken them and taken the money. When Miss Jane figures out what has happened, Jake Clampett is arrested. Jed wants Jake freed as he might be kinfolk. Jake tries to pass himself off as a long lost cousin. Gil Perkins appears as the pool man.