Granny's concocts a love potion for Elly Mae at the same time Mr. Drysdale hires an escort for Elly. Dean arrives at the mansion with the Clampetts believing he's Miss Jane's boyfriend so Granny tries a reverse spell.
Jed and Granny are concerned the young'uns aren't meeting anyone so decide to throw a wing ding. Miss Jane provides the music but the older Clampetts are confused by the band names. A mix between a square dance and rockfest ensues.
Mr. Farquar, Mrs. Drysdale's father comes for a visit. When he's alone with Drysdale, he reveals he's broke. It seems on his way over, he passed through Las Vegas and lost his whole fortune and is asking Drysdale for a handout, which he refuses. He later learns of the Clampetts, he goes there hoping to get some of their money so he can go back to Las Vegas.
Jethro wants to a general and Mr. Drysdale decides the safest idea is to get him into a boys military academy. With Jethro twice the size of the other boys the commander has his doubts while a mock battle confuses Granny and Jed.
When Mr. Drysdale is unhappy with Dr. Clyburn's treatment of his cold the Clampetts hear about it. Granny decides it's time to set up practice and enlists the rest of her family to help. She also claims a cure for the common cold.
When Granny hears the Drysdales are at a horse show she declares she wants good trotter so she can ride it to the market. But Mr. Drysdale buys a racer along with a buggy which Granny decides she wants to be the driver at the track.
The Clampetts believe resuming his courtship of Elly is why Sonny Drysdale returns. But his stepfather arranges a job as a beauty product salesman and his first stop is at the Clampetts where they think his merchandise are courting gifts.
Granny, along with Elly, is heading back to the hills to do some doctoring. Mr Drysdale is frantic to stop her so he reveals that the Brewsters are having a baby. Jethro brings home some girls from the Kit Kat Club so he won't be lonely.
Jed thinks Granny needs help in cleaning the mansion but she believes it's because he wants to put her in a retirement home. So Granny is ready to head to the hills with her money which Mr. Drysdale is desperate to avoid.
Musicians Flatt and Scruggs, old friends of the Clampetts, visit with their glamorous wives. Banjo music is performed, Gladys sings a song and Granny teaches her to cook. Jethro adapts the truck to avoid traffic.
Drysdale, at first irate that beautiful actress Bergstrom is kept on an expensive stipend without making a film, is smitten at first sight and so places the actress in the Clampett home to learn backwoods accents and ways for a movie.
Granny remains eager to get Elly to the altar and decides Professor Biddle, Miss Jane's friend, will do. Mr. Drysdale blackmails Dash into asking the Clampett lass for a date. The meek birdwatcher and the handsome actor are soon at odds.
Jethro is in love again and decides to get a job as an actor. Taking the name Beef Jerky, he finds himself Dash's stunt double and has a rough time at the studio. Jethro's "girl" Debbie only want a screen test and plays up to Jed.
Granny brews a batch of her tonic hoping it helps Elly get a husband. Jane with Mr. Biddle are trying to hatch a condor egg but a sip of the potion changes the birdwatcher's focus and the Clampetts need to get him out of a tree.
Jed thinks Jethro needs to go back to school to get his mind off girls. But instead of college Jethro enrolls in a secretarial school who take his money and graduate him early. At his new bank job he hires all his classmates.