This animated adventure features the new addition in the Rubble household. Wait until you meet Hoppy, the hyperactive kangaroo.

A blow on the head causes Fred to lose his memory and revert to infancy. Wilma and the Rubbles rush Fred to the office of Dr. Len Frankenstone, a genially mad scientist who has been experimenting with brain transference. Frankenstone figures that the best way to return Fred to normal is to transfer his personality to his house pet Dino, and vice versa. Before the episode ends, everyone in the cast has undergone a bizarre metamorphosis, with Wilma acting like Fred, Barney acting like Betty, and so on into the night!

Hoping to lose a few pounds, Fred tries out a reducing formula of his own invention. As a result, Fred not only loses weight but height, shrinking down to the size of a small boulder. Hoping to capitalize on this phenomenon, Fred talks Barney into posing as a ventriloquist in order to land a guest appearance on the TV variety series hosted by Ed Sullystone. Naturally, itty-bitty Freddy intends to sit on Barney's lap and pose as his dummy--but what nobody has counted on is the possibility that the reducing formula will wear off right in front of a coast-to-coast audience!

Fred tries to arrange a birthday party for his daughter Pebbles on the same night that he has been slated to book a stag party for his lodge, the Loyal Order of Water Buffaloes. Accordingly, Fred pays a visit to Bedrock's only caterer--who carelessly confuses the two assignments. As a result, Fred's lodge brothers writhe in agony while watching the childish antics of Rocko the Clown, while Pebbles and her infant guests are treated to the spectacle of the leggy "Boulderettes" performing their precision dance routine! (Note to parents: keep the kids away from that "cactus juice"!)

Fred feels like odd man out when rodeo star Bony Hurdle gallops into Bedrock. A former boyfriend of Fred's wife Wilma, the genial Bony seems poised to recapture her affections--and even worse, Hurdle has also won over baby Pebbles. In an effort to reassert himself, Fred decides to take up bronco-busting...even if he busts himself in the process. This episode was written by Rance Howard, the father of producer-director Ron Howard.

Fred's boss Mr. Slate is throwing a party, and all of his employees have been invited--all but Fred. Immersed in self-pity, Fred begins reading the story of "Cinderelly" to Pebbles and Bamm-Bamm, then dozes off. When he awakens, who should be standing before Fred than his own Fairy Godmother, who has come up with a magical scheme to get our hero into Slate's party in a clever disguise. Of course, this could never really happen; it's all a dream--or...IS IT?

Another adventure with Fred and Barney. This time they are after an inheritance, but must spend the night in a spooky mansion that belongs to giggles Flintstone!

Future M*A*S*H producer Bill Idelson cowrote this wild and wooly takeoff of the James Bond craze of the early 1960s. After watching the exploits of their favorite TV superspy Jay Bondrock, Fred and Barney are quite surprised when a slinky seductress named Madame Yes shows up at the Flintstones' doorstep to deliver a mysterious message. Before long, our heroes are kidnapped and spirited away to the island headquarters of the sinister Dr. Sinister, who is deeply involved in a scheme to take over the world. As it turns out, Fred and Barney have less to fear from the spies than they do from their wives--who can't figure out why their husbands have been gone from the house for so long!

In the spirit of such like-vintage TV sitcoms as The Addams Family and The Munsters, this episode finds the Flintstones meeting their new neighbors, the Gruesomes: Weirdly, Creepella, and little Goblin. The bizarre behavior of the Gruesomes is off-putting enough for Fred and Wilma, but things really get hairy when the neighbors' grotesque-looking pets make themselves known! (Trivia note: A seminal version of the Gruesomes, named Mr. and Mrs. J. Evil Scientist, originally appeared in a handful of Hanna-Barbera's "Snooper and Blabbermouse" cartoons).

Fred enters Pebbles in Bedrock's "Most Beautiful Baby" contest, and Barney follows suit by entering Bamm-Bamm. The competition between the two daddies becomes quite bitter, and before long has exploded into full-scale warfare. Upset by their elder's childish behavior, Pebbles and Bamm-Bamm run away from home, leading to a hectic finale. Watch for some of the other entrants in the Beautiful Baby Contest--especially those triplets who look (and act!) like the Three Stooges.