Stoney Curtis is in town shooting a film. To promote it, a contest offers the prize of Stoney as slave for a day. Wilma and Betty win, and Fred sets Stoney to work as if he really were a slave. At Wilma's prompting, Stoney encourages Fred to believe that he himself could become a Hollyrock star, and Fred falls for the bait so seriously that he decides to put his house up for sale.
Fred invests his income-tax refund in the purchase of an ailing circus. The performers, whom the former owner left unpaid, walk out on him, so Fred and Barney try to put on a show themselves.
Fred and Barney go on a weekend camping trip, claiming that women can't rough it as they do. In response, Samantha Stephens takes Wilma, Betty, and the children camping, using her magical twitch of the nose whenever necessary to upstage the boys.
The Flintstones and the Rubbles attend a costume party at the Water Buffalo Lodge on the same night as a radio report as Bedrock is " invaded" by outer space aliens The Way outs.
Rockarabians seek the missing heir to their nation's throne. They know what he looks like: enough like Barney Rubble to be his twin. Ignoring his protests that they have the wrong fellow, the Rockarabians carry Barney bodily to the hotel at which their delegation is staying. Barney begins to think it might not be so bad to become an exotic monarch, until he is told he will have to select many beauties for his harem--something he knows Betty will never allow.
Betty and Wilma want to go out for the evening, while the boys want to practice for an upcoming bowling tournament. No problem: the Great Gazoo creates doubles of Barney and Fred. Or, more precisely, the doubles are the beginning of a big problem.
Spats between spouses escalate to such a degree that the couples split: Fred and Barney are thrown together as roommates, while Wilma and Betty are bunking together at the other house.
Fred has violent sneezing caused by an allergy. To stop the sneezing, he goes to the drug store for a bottle of "Scram." Each such pill stops a fit of sneezing, but has the side effect of turning Fred temporarily into an ape.
At the races at Hollyrock Park, Fred and Barney wager on dinosaurs picked by the Great Gazoo. Gangsters take note of their success and kidnap the two friends so that they can make winning picks for them.
Traveling through the desert on their way to Rock Vegas, Fred and Barney fall prey to con men who have seeded the river with phony gold. When it turns out that the river contains real gold after all, the con men will do whatever it takes to oust the Flintstones and Rubbles from their claim.
Mr. Slate gives Fred the use of his yacht--on condition that Fred paint it. Fred falls asleep and wakes to find himself aground on a desert island. Or is it an amusement park?
When Fred chooses bowling over taking her to a ball, Wilma calls upon a rich, dashing old boyfriend to escort her to the ball instead. Fred ultimately decides to crash the ball later in the evening, escorting his own date--Barney, transformed into "Barbara" by the Great Gazoo.
The cavemen and their children meet "Dripper," a dolphin-like sealasaurus and star of a show at a marine park. Dripper is the target of an abduction plot. Thinking they have Dripper, the kidnappers instead abduct Barney, who's dressed in scuba gear.
