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.

Ellie has Dr. Martin of the zoo come over to treat her dog Duke who is sick. But Granny mistakes a bug repellent salesman Jim Gardner, who ends up falling for Ellie, for the veterinarian. Granny thinks he is no "Critter Doctor" but actually a "Bug Doctor" who is there to sell "bug vittles". Granny is taken with Dr. Martin, after finally meeting him.