Mr. Drysdale buys Mammoth Pictures, a movie studio. Jed, Granny, Elly and Jethro try to "help" the studio, which is losing money, by working at the studio.
Mr. Drysdale tells the Clampetts that he is building a city on the location where Jed's movie studio is located. The Clampetts mistake a western prop town for the city.
The Clampetts are still at the studio hoping their "city" prospers. Mr. Drysdale is still trying to tear the studio down for his building project. A famous Hollywood columnist enlists Jed's help to save the studio.
Jed gets an honorary doctorate when he donates money to the college that Mr. Drysdale attended. Now the family thinks he can practice medicine, which doesn't sit well with Granny.
Mrs. Drysdale thinks she can get the hillbillies to move out by throwing herself at Jed. Meanwhile Granny is itching to fight her because she fell into the cement pond when Jed had to stop a fight between them earlier.
Jethro decides to enlist in one of the armed forces but he isn't sure which one. The Clampetts go to Marineland thinking that's where he would go to join the Marines.
An old friend from back in the hills is now an Elvis-like singing idol. The Clampetts misunderstand the situation and decide to help Johnny "get on his feet".
Mrs. Drysdale needs Jed to donate $190,000 to save the Beverly Hills Ballet, but he has his hands full trying to keep Granny from heading back to the hills, pushing all her stuff in a wheelbarrow.
The Clampetts still don't realize that Mr. Pinckney is their butler instead of their boarder. When he tries to leave them, Granny thinks he is trying to skip out on paying his rent.
Hospitalized for nerves from dealing with the hillbillies, Mrs. Drysdale threatens to stay there until Mr. Drysdale gets rid of them, and she even sends for a specialist. Unfortunately, the Clampett clan is on their way to visit her.
Mrs. Drysdale wakes up to find she is no longer in the hospital. The Clampetts, unhappy with what they feel as the hospital's poor level of care, break her out and set her up in their mansion.
As a favor to Jed, Mr. Drysdale arranges for a playboy bank director (who normally only dates women half his age) to come court Granny, while Jed goes out with a beautiful woman who dates rich older men.
Granny wants Jed to find a wife and asks for Mr. Drysdale's help. He introduces Jed to Phyllis but learns too late that she is a gold digger, and becomes alarmed when they head to the track. But it's Granny they need to worry about.
Jethro decides to become a "double naught" spy and converts the family's truck into his idea of a Bondmobile. But he becomes the unwitting pawn in another banker's scheme. They also help Jethro after he bumps his head.
Mrs. Drydale's poodle Claude is to enter a dog show but gets sick right before. Granny offers to doctor the dog but Ellie Mae is concerned he doesn't know any tricks so she decides to help out with one of her own pets.
John Brewster, the oilman from Tulsa, is bringing his new bride to California for their honeymoon. Somehow the Clampetts get the idea that their backyard rustic cabin is the ideal place for the Brewsters to stay.
With the arrival of spring the Countess returns for Granny's new batch of spring tonic. Granny thinks she's looking for a new husband and that Jed is her perfect match.
Mr. Drysdale owns a building that houses a beatnik's club. He hopes to get rid of them when they can't pay their rent but they find a new a sponsor: Jed Clampett.
Mr. Drysdale is appalled to learn that Jed is going door-to-door peddling his services as a handyman. But then he's apoplectic when he discovers that Jed has been hired by a rival bank.
A longtime employee of the Commerce Bank is being forcibly retired to make way for a new computer system. A chance meeting with the Clampetts gives him an idea about dealing with Mr. Drysdale.
Beauregard Short arrives in Beverly Hills from back home. Everyone assumes he's looking for a wife and Jethro decides to show him how to be like him, an international playboy.
Mr. Brewster, the oil man who made Jed a multi-millionaire, arrives in Beverly Hills with his wife planning to build their dream house. Jed and Granny think they have the perfect house in mind for their dream home.
Granny is determined to go back home even if she has to walk back all by herself. When she reaches Las Vegas she has second thoughts. Jethro gets arrested by an undercover cop.
Mrs. Drysdale thinks she has a new way of getting rid of the Clampetts: talk Jed into donating their mansion to the city for an art museum. They agree, on the assumption that they are supposed to provide the artworks and not move out.
