The Beverly Hillbillies S02 E32 Jed, Incorporated

"Y'all come back now, ya hear?"

Jed becomes head of a corporation, which Drysdale organized for him as a tax write-off. The Clampetts decide they want to help out at their corporation, and get the penthouse suite in the bank building. They get all dressed up, Elly in one of her ball gowns, and go to the bank.