The Clampetts Are Overdrawn
After seeing the pool man putting chlorine in the pool, thinking it is poison and getting a letter they are overdrawn, the Clampetts think that they are broke and Drysdale is trying to get rid of them. However, this is all a misunderstanding, since the letter Jed got was meant for another J.D. Clampett, Jake, who is an out-of-work actor.