A nouveau riche hillbilly family moves to Beverly Hills and shakes up the privileged society with their hayseed ways. Max Baer Jr., who plays Jethro, is the son of Jewish-American boxing champion Max Baer.
A backstory presentation of how a dirt poor mountain family acquired millions in oil and moved to Beverly Hills, California.
The Clampett clan finds features of their new Beverly Hills mansion beyond their comprehension. Highly educated bank secretary Jane Hathaway finds them beyond hers.WE
Without a pump anywhere on the premises, only the cement pond provides the Clampetts with wash water.
Snooty Mrs. Drysdale zooms in from her Boston retreat to see for herself what kind of people are the Clampetts. Meanwhile, the Clampetts discover the telephone.
As Mrs. Drysdale revives from her first encounter with the Clampetts, she thinks she's hallucinating due to Clampett efforts to help her, believing her a lush.
Fired up over Beverly Hills unfriendliness, Granny aims to return to the hills. Jed talking her into visiting their neighbors themselves coincides with Halloween.
To give the Clampetts some polish, Mr. Drysdale has them take in his butler and maid, hoping they'll work wonders.
A letter from Pearl reminds Jed to enroll Jethro in the 5th grade. A snooty Beverly Hills headmistress does not catch on that the Jethro they're enrolling is not a little boy.
Mr. Drysdale convinces his self-absorbed stepson Sonny to date Elly May to Mrs. Drysdale's consternation, while Granny and Jed make preparations for Thanksgiving.
While Sonny Drysdale decides he needs to be Pygmalion to Elly's Galatea and remake her from a hillbilly into a woman of society, Granny uses love charms to heat up their relationship.
Pearl and Jethrine finally arrive. Granny and Pearl fall immediately into a competition on who they can get married first, Jethrine or Elly Mae.
Granny and the rest of the Clampetts start a feud with the Drysdales since Sonny courted Elly May then stood her up when Granny suggested marriage.
Jed, Elly May, Jethro, and Granny take their first airplane flight back home for Christmas to visit cousin Pearl, who's busy cooking up a feast to win Mr. Brewster's unwilling heart.
Back home for Christmas, Elly May bonds with her old animal friends, while Pearl plays the piano for the "new" movie in town (the silent version of Ben Hur) to impress Mr. Brewster.
For man-hungry Pearl to save face, Jed has Mr. Brewster publicly propose, with Pearl to turn him down, but hamming it up makes things not go as planned.
Once returned to California, sparks fly between Granny and Pearl, two mountain women each of a mind to mind the mansion in their own ways.
Granny and Cousin Pearl are at each other's throats over who's going to take care of cooking and the house, so Jed has to find ways to keep them apart.
A misunderstanding has Jed believing he has to save the Drysdale's marriage from Pearl's man-mesmerizing yodeling.
When Pearl starts selling music lessons, Mrs. Drysdale complains about the noise to the police. Mrs. Drysdale also calls the dog catcher on Duke.
Flatt and Scruggs and their wives come to visit their old sweetheart, but Pearl thinks they're there to propose. Jed throws a wingding for them and the duo play music for the Clampetts.
Granny can't stand Pearl's yodeling so she reports her to the police. When one of the officers takes Pearl out, Granny thinks she got Pearl in trouble and becomes sad and contrite. Meanwhile, the police find Granny's still.
Jed and his dog Duke are both feeling down without a woman in their lives, until they see a French woman and her poodle.
Henry Jones shows up at the Clampett's, pretends to be an old friend and tries to sell the family the Hollywood Bowl, Griffith Park, and the freeway.
Drysdale hires Jed to be a banker when he needs a crack shot to help beat a rival banker in a skeet shooting competition, but his partner needs to be an employee.
Mrs. Drysdale wants to get rid of the Clampetts before the arrival of Mrs. Smith-Standish, the head of a 'first family' historical society. But Mrs. Smith-Standish goes to the Clampett's home first, and becomes enchanted with their way of life.
Mrs. Drysdale continues to be forced into doing "practices from the past" by Mrs. Smith-Standish, who discovers that Jed's family is possibly the first to come to the country. If so they'd be famous worldwide, but does Jed want that?
Miss Hathaway's brilliant-but-frumpy bank protegee Gloria is really a sultry gold-digger with eyes for Jed's $34 million, and Jed's just had double his annual dose of Granny's spring tonic.
When an IRS agent gets chased away by Granny, Mr. Drysdale tells him the story of how the Clampetts came to be rich and move to Beverly Hills.
Jed and Jethro go golfing with Leo Durocher, coach of the Los Angeles Dodgers, who wants to recruit Jethro as a pitcher when he sees how well he can throw.
Mlle. Denise comes back for the birth of her dog's puppies, and to see Jed. Mrs. Drysdale isn't happy when she finds the puppies share more in common with Duke the bloodhound than Claude the poodle.
Jed arranges a party to get Grannie out of her doldrums and invites the Drysdales. But when Mr. Drysdale's boss comes and wants to meet them, he worries he'll be sent to an Alaskan bank when his boss finds out he's been lying about Jed & his family.
When a couple who ran into the Clampett's car discover that they're rich, they fake injuries and sue the Clampetts.
Jethro needs a health certificate to graduate from the fifth grade, so he goes to the only doctor the Clampetts know: Mrs. Drysdale's psychiatrist. Pearl thinks he is testing her virtue when he invites her to lie on his couch.
Jethro finally gets his bill of health from Dr. Twombly so he can graduate the fifth grade, Drysdale brings him to the Clampetts' just as Granny shows Pearl how to use a love potion, so everyone thinks Twombly's interest in Granny is love.
When Miss Hathaway gets sick and Mr. Drysdale has to speak at a conference, Jed helps out by running the bank and having Elly be his secretary, while Jethro finds a speech that Drysdale accidentally uses instead of his own.
Jethro invites his 5th grade classmate to visit his home. Armstrong Dueser McHugh III arrives in a limo; he is coddled by a chauffeur who treats him as sickly and frail. The Clampetts know better and teach "Duesy" how to have a good time.
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