The Beverly Hillbillies S01E08 - Jethro Goes to School

Jed enrolls Jethro at an exclusive Beverly Hills elementary school. Millicent Schuyler-Potts, the proprietor of the school, is aghast when Jed and Jethro show up, convinced this is part of some ghastly hoax. After Jed says that banker Milburn Drysdale is his neighbor, she calls the banker. It turns out that Drysdale's bank holds the mortgage on the school. Schulyer-Potts suddenly warms to the charms of the Clampetts, even if it means accepting Jethro as a fifth grader.