Hearing about a talent search for a new animal star to appear in ""The Adventures of Sassie,"" Fred coaches Dino and prepares for an audition. But Dino gets more than he bargained for when he lands the part.

In an attempt to cure Barney's hiccups, Fred offers his friend a swig from an experimental soft drink he has formulated. The brew turns Barney invisible, and Fred's elaborate attempts to hide the fact make Wilma wonder about her husband's sanity.

A series of strange accidents coupled with Wilma's sudden insistence on having Fred take out a life insurance policy, and her devotion to a murder mystery novel about a wife who bumps off her husband, causes Fred to wonder if his life is in danger.

With fatherhood impending, Fred promises to become more kind, considerate, and thoughtful. His willingness to change is strechted practically beyond endurance when his mother-in-law shows up to help Wilma during her pregnancy.

Wilma is still pregnant and Fred is trying to be calm. This shatters when the docter tells him the blessed event could happen any day now.

An efficiency expert hired by Mr. Slate informs Fred that he will be fired unless he gets a high school diploma. Slate offers to send Fred to school, and Wilma mistakenly assumes that Fred is being groomed for an executive position.

Wilma is in dither over finding an act for her auxiliary's benefit show until big mouth Fred boasts that he will line up singer Rock Roll, whose hit song is ""The Twitch."" Now committed, Fred has to pull out all the stops to obtain the rock star's participation.

After using the family's vacation money to buy a fur wrap, Wilma devises a scheme to repay the money by renting their home to Swedish musicians.

The talking dodo bird that Fred gives Wilma for her birthday turns snitch, informing her that Fred and Barney are plotting to sneak away for a Water Buffalo Convention in Frantic City. Wilma, Betty, and the wives of Bedrock plan a surprise of their own at the convention.

Fred overhears Wilma on the phone mentioning ""a little stranger"" who will shortly be visiting the household. Assuming that Wilma is pregnant, Fred summon his dreaded mother-in-law. But the ""little stranger"" turns out to be Arnold the paperboy.

Wilma and Betty enter a television contest and win first prize, a trip for two to Rockiki Beach and a role on the television show ""Hawaiian Spy."" The two families journey to Hawaii, where Fred ends up working as a stunt man on the show.

Barney and Fred skip work to go to the ball park, but Barney only has one ticket. The situation gets complicated when Fred dresses up as a women so he can get in free for Ladies' day. After Betty finds lipstick on Barney's handkerchief, the wives are in hot pursuit. Adding to Fred's problems is the fact that Mr. Slate is entertaining a client at the game.

Barney's loud suffering from a toothache has been keeping the entire neighborhood awake at night, so Fred promises to take him to the dentist the next morning. But having already spent the money for the dentist, Fred has to find a low-cost way to remove his friend's tooth.

Fred's inept efforts at housework during Wilma's pregnancy are worse than no efforts at all, so he sets out to hire a housekeeper, ultimately bringing home a bank robber named Grandma Dynamite, who is in need of a hideout.

Fred convinces Barney to buy an instant Polarock camera and the two go into the photo business. When they mistakenly snap the pictures of two escaping bank robbers, they are able to sell the photos and recoup Barney's money.

Wilma is charmed by the exploits of the Kissing Burglar, a criminal whose m.o. involves leaving a rose and a kiss for the lady of the house. Her comment that she has nothing worth stealing annoys Fred, who decides to teach her a lesson by posing as the burglar--on the very night the real one shows up.

At Wilma's insistence, Fred hires an Italian maid, Gina Lolabrickida, to do the cooking and cleaning, but problems arise when she quits on the night Wilma has promised her to Betty, and Fred brings home Mr. Slate for an authentic Italian dinner.

With the baby coming, Fred asks Mr. Slate for a raise. Slate, however, is tired of such demands from expectant fathers, so he plans to head Fred off with ""Operation Cringe.""

Fatherhood has already made Fred resolute in his effort to acquire serenity, but his will power is put to the test by the formidable Nurse Frightenshale, who is sent by Wilma's mother to take care of the Flintstones' cave.

Barney learns how to throw his voice and can't resist having some fun at Fred's expense. He leads Fred to believe that his newborn daughter Pebbles has miraculously learned to talk.

When Barney loses his job, Fred approaches Mr. Slate about hiring his friend for the quarry. He is mortified, however, when Barney lands the position of vice president, and becomes Fred's boss!

Fred discovers he is off his game right before the big bowling match. After hearing in a television commercial that rhythm is ""the secret of success in many activities, including bowling,"" he rushes off to the Bedrock Dance Academy to sign up for ballet lessons.

The Lodge delegates Fred and Barney depart for a convention at Stone Mountain Ski Resort, leaving their disappointed wives at home. The girls congratulate themselves on being so understanding until they become involved in a big diamond theft and beauty contest at the resort.

With his eye on an inheritance, Fred tells his rich Uncle Tex that he has named his child after him. Fred, of course, has no son, which means that he has to find a baby now that Uncle Tex is coming to visit! Unable to borrow a real baby, desperate Fred cons Barney into playing ""Baby Tex.""

Barney rescues a baby from a runaway carriage, but it is Fred who gets the credit and attention. His feeble attempts to set the record straight finally give way to his enjoyment of the celebrity, until cold shoulders from both Wilma and Dino, and a visit from his own conscience, persuade him to tell the truth.