1965 Dodge Dart Charger

Glad to help out.
After posting, I googled the episode name, copied a link, was going to edit my post but toolmanmike had already done it within 2 minutes!!!

You will notice that in the credits it will say something like "Vehicles Supplied by Chrysler Corp. As toolmanmike mentioned, they also supplied cars to Beverly Hillbillies so Miss Hathaway always had a brand new Dodge convertible every year. The studios didn't buy them, the factories supplied them at no charge to get exposure to millions of viewers.
My 3 Sons always had Pontiacs, Steve had a brand new station wagon every year. Even when Mike and Robby got their first cars, they were 10-15 year old Pontiac convertibles.