Fred is mistakenly granted membership to a swanky country club and asks Gazoo to turn him into a gentleman, a plan that involves taking ballet lessons, which makes him the laughingstock of the neighborhood. Finally Fred decides that he and Wilma should be themselves, and together they become the hit of the club.
Fred is delighted to be invited onto Mr. Slate's yacht, until he learns that he is there to paint it. Asking the Rubbles to join them, the couples start having so much fun on board that they forget the paint job and fail to notice the yacht has broken free and is drifting. Slate charges Fred with mutiny and piracy, but Fred redeems himself when he rescues the visitors to an island (including Slate) from a volcano.
Fred refuses to play the lead in the PTA show, ""Romeorock and Julietstone,"" opposite Wilma, so she casts Barney instead. Feigning the mumps, Barney (who is terrible in the part) drops out, forcing Fred to take over. But then laryngitis causes Wilma to drop out, so Barney rushes back in, now playing Julietstone!
A mix-up at the pharmacy gives Fred pills that turn him into an ape. Barney is the only one to see this short-lived effect, which makes him wonder about his own health. But when the two dads take their kids to the zoo and Fred ends up in the monkey cage after taking another pill, his problem becomes apparent to all.
When Fred is fired by Mr. Slate for fronting the other employees' list of grievances, he turns to pastry entrepreneur by selling Wilma's gravelberry pies. But soon the couple realize they are spending more in ingredients than they are making in profit. Ultimately, Wilma recoups the losses by selling the recipe to a supermarket tycoon.
Bored by his company picnic, Fred slips away to take a nap, and awakens twenty years later to discover that Barney has become millionaire B.J. Rubble, and that Pebbles and Bamm-Bamm have gotten married. Upon entering Wilma who is now living alone through Barney's largesse, Fred really awakens and realizes it was all a dream.
Fred and Barney discover a visitor from another planet, the two-foot high, green Gazoo, who becomes their servant. An evening out at an expensive restaurant, supposedly with Gazoo treating, becomes a nightmare as the alien disappears, leaving the Flintstones and the Rubbles to wash dishes to pay for the food.
Samantha and Darrin Stephens guest star from television's ""Bewitched"" (voiced by series star Elizabeth Montgomery and Dick York). Darrin goes boating, while Samantha joins the Flintstones and the Rubbles for a camping trip, which ends up pitting the men against the women. Aided by Samantha's witchcraft, the women manage to out-do the men at every turn.
Hoping once again to strike it rich, Fred buys a circus. When the performers quit, Fred must put a show on himself with the help of Barney, Dino, and Hoppy, which he does successfully--so much that the performers return, and the former owner buys the big top back. To prove he is cured of get-rich-quick schemes, Fred passes up a chance to buy an oil well, which of course pays off.
Through a publicity contest, Wilma and Betty win movie star Stoney Curtis (voiced by Tony Curtis) as a ""slave boy"" for a day. Jealous Fred works him unmercifully, until Stoney offers him a job as his stand-in for a new movie. Fred quits his job and prepares for life as a star, which, of course, is not all it is cracked up to be.
When Wilma gets a letter from her mother saying that she is moving in with her favorite son-in-law and his wife, Fred begins refurbishing a dilapidated shack to house Mrs. Slaghoople. But soon Wilma learns that he mother was not referring to Fred, but her other daughter's husband. Fred is delighted, until he realizes how much he spent on the shack.