A rural Ozark family relocates to Beverly Hills after oil is discovered on their property worth $25 million. After finding oil on the land, the family is surprised when Mr. Brewster (Frank Wilcox) of the OK Oil Company offers to buy it. After much coaxing by Cousin Pearl (Bea Benaderet), Jed (Buddy Ebsen) sells the swamp and moves the family to a mansion in Beverly Hills. Upon their arrival, they are arrested because of a case of mistaken identity but are later returned to the mansion safely.
The rough-hewn Clampetts are mistaken for servants as they try to adapt to their new environment.
Jane Hathaway finds that making the Clampetts more sophisticated will be harder than expected, while Pearl Bodine tries to get the attention of Mr. Brewster.
Mr. Drysdale tries furiously to make the Clampetts more acceptable to his socially-conscious wife.
Upon Mr. Drysdale's advice to buy good stock, Jed purchases cows, pigs, and chickens to raise.
The homesick Clampetts decide to go door-to-door meeting their Beverly Hills neighbors, not knowing it is Halloween.
Yet another Drysdale attempt to "reform" the Clampetts goes awry when he tries to loan his servants to the hard-working family.
The headmistress (Eleanor Audley) of an exclusive private school for boys is astonished to find the teenaged Jethro enrolled in her fifth grade.
Misunderstandings abound as the spoiled college student Sonny Drysdale attempts to woo Elly May, only to flee to his mother in the end. Louis Nye guests as Sonny Drysdale.
Sonny resumes his high-class courtship of Elly May, by playing Julius Caesar and Pygmalion.
The Clampetts try to get Sonny to propose to Elly May, as Cousin Pearl steps up her efforts to get Jasper Depew to marry her daughter Jethrine.
The Clampett clan takes great offense when Sonny Drysdale jilts Elly May, and they start a feud with the Drysdales to avenge their kinfolk's honor.
The Clampetts return home to the hills to celebrate Christmas, where Cousin Pearl is still trying to win Mr. Brewster's hand in marriage.
Back in the hills, the Clampetts aid Cousin Pearl in her efforts to get hitched to Brewster.
Jed and Mr. Brewster contrive to end Cousin Pearl's pursuit of the oil man with his public surprise proposal.
Upon returning to Beverly Hills, Granny and Pearl spar over who is the woman of the house.
As the Granny-Pearl feud continues, Jed tries to calm things down by taking a sightseeing tour of Beverly Hills.
When his wife is away, Mr. Drysdale requests a female member of the Clampett family to perform housekeeping duties for him.
Many animals and even the police respond to the unique sounds from Pearl's yodeling lessons.
Two of Pearl's most ardent former suitors come to visit her in Beverly Hills.
Granny calls the police in an attempt to stop Pearl's incessant yodeling, but her plan backfires when the officers discover her still. Eddie Dean portrayed a police officer.
Duke, the Clampetts' bloodhound, uses his animal magnetism to draw Jed and a Frenchwoman together.
A conman gives Jed a bargain when he offers to sell Griffith Park, the Hollywood Bowl, and the freeway to the millionaire.
When a rival bank challenges him to a skeet shoot, Mr. Drysdale has no choice but to enlist the sharpshooting skills of Jed by making him a bank vice president.
A prominent genealogist finds evidence that Jed's ancestors came to America prior to the arrival of the Mayflower.
After much excitement about the family entering the high society life, Jed lies to the genealogist to get things back to normal.
A fortune hunter sets her sights on Jed. Guest star: Lola Albright.
Jed and Granny are suspicious of a tax collector from the IRS.
After playing golf with Jethro, Los Angeles Dodgers manager Leo Durocher wants to sign him as a pitcher.
Duke and Jed become reacquainted with their French lady friends.
After securing the Clampett account, Mr. Drysdale is in line for a pay raise.
It's a case of one man's word against another as the Clampetts are accused of reckless driving in court.
A psychiatrist may have bitten off more than he can chew when he starts treating Jethro.
The psychiatrist shows great interest in Granny's home remedies for various ailments.
Believing he needs their help, the Clampetts volunteer to work at Mr. Drysdale's bank.
Jethro's friend Armstrong enjoys the less rigid lifestyle he encounters during a visit to the Clampett mansion.
Jed pretends to be sick so that Granny can get to doctoring and feel more at home. Mr Drysdale and his physician get pulled into the ploy and Granny's mountain medicine is put to the test by a city doctor.
Granny's unlicenced medical practice draws the attention of the authorities.
The Clampetts decide to plow up their carefully manicured front lawn, to grow vegetables.
The Clampetts unwittingly become the pioneers of a fashion style that everybody who's everybody is wearing.
Jethro develops feelings for an exotic dancer named Chickadee (Barbara Nichols), and brings her home to meet the folks.
As marriage seemingly draws nearer, Jethro discovers a deal-breaking secret about Chickadee: she can't cook.
An unemployed actor named J.D. Clampett benefits from a paperwork mixup at the bank, becoming $36 million richer.
Newly-discovered cousin Jake Clampett decides that the hillbillies should act more like Hollywood movie stars
Jed and Granny want to have some turkey for Thanksgiving, but Elly May has other ideas.
The guests at Mrs. Drysdale's garden party get a surprise when the Clampetts show up.
Jed begins searching for a wife, who he hopes will be able to turn Elly May into a young lady.
Mr. Drysdale's efforts to prove to the Clampetts that Beverly Hills is really the place for them to be only makes matters worse.
A television, a boat, and a chimpanzee are among the many gifts Mr. Drysdale gives to the Clampetts for Christmas.
An escaped kangaroo reported by Granny as an oversized jackrabbit leads the others to suspect she has had too much moonshine.
Some old love letters from Jethro lead a mountain man and his daughter (Muriel Landers) to Beverly Hills.
Elly May enters a Beverly Hills beauty pageant, but may have to face competition from Granny.