The Brady Kids -- Marcia, Jan, Cindy, Greg, Peter and Bobby -- along with Mop Top, their dog, enter a balloon race at the local carnival. But something goes wrong and the balloon takes the group to a strange, far-away island inhabited by the most eccentric characters the kids have ever seen. It is on this island that the Bradys meet a host of colorful new friends who become regulars in "The Brady Kids" series. Among them are Marlon, a magical mynah bird whose talents include ventriloquism and impersonations; Ping and Pong, two pandas who speak only Chinese, and Father Nature, who, henpecked by his wife, Mother Nature, has taken over her responsibilities, causing earth- shaking chaos. These two episode originally together for 60 minutes as part of the "ABC Saturday Superstar Movie" series.
Peter wishes he is movie star Clint Flint. But in effort to grant his wish, Marlon screws up and morphs Bobby's body into Flint's and vice versa. The unsettling things that happen to Bobby at school are nothing compared to what happens when Bobby and the other Brady Kids, along with Mop Top, Marlon, and Ping and Pong, descend upon the movie studio where Clint Flint is supposed to be working.
Bobby wishes that his pin was made of real silver but when his wish comes true it turns out to be the Lone Ranger's horse!
Cindy meets mild-mannered Clark Kent and the Brady Kids are teamed with him to paint a bank building during the city's "Paint-Up" week. The Wily Toulouse La Trick and his henchman Igor substitute delayed-action invisible paint so that when the bank becomes invisible they can rob it. Little do they realize that Clark Kent can change into Superman any time he can find a telephone booth.
The magical bird Marlon gets sealed in a can at a soda pop plant and the gang have to rescue him.
The gang enter their animals into a pet show and Marlon accidentally gets involved.
Greg and Chuck have a ski race even though Greg can't ski. Marlon's interferance only makes things worse.
The Brady Kids make friends with some little men from Venus when they accidentally pick up their spaceship.
Greg discovers that his enemy and his sister are his rivals in the school election.
The group hear a coversation about a pair of thieves planning to steal the crown jewels and attempt to stop them.
The kids go on a cattle drive with their uncle but find out there is only one cow.
The Brady Kids meet Wonder Woman. Then Wonder Woman and the whole Bunch are transported to ancient Greece where they arrive right in time for the Olympic games. The Kids, eager to participate in the events, compete in order to qualify for the Marathon run. With the help of their pets, the Kids defeat the Greeks athletes and therefore become eligible to participate in the Marathon run. However, Wonder Woman urges them to disqualify themselves because they run the risk of altering history if they win the actual race.
A television talent show is coming to town and nearly everyone decides to create an act so they can enter.
Marlon and Merlin switch places as Marlon is transported into history and Merlin comes to the present and has to adjust to life on the future.
The group take pity on a seemingly poor man completely unaware he is in fact the world's richest man.
The gang enter a road rally and end up at the house of the Wrong brothers who take parts from their car in order to make their aeroplane.
Marlon changes a statue of a cat into a hippo and accidentally sends it to Africa. The gang go to Africa in search of it.