In order to have the scariest Halloween costumes ever, Jimmy uses his latest invention to morph Carl and Sheen into a Vampire and a Werewolf.

After a run in with a radiation belt in outer space, Jimmy, Cindy, Carl, Sheen and Libby are all endowed with super powers.

Jimmy is desperate to get the starring role opposite dream girl Betty Quinlan in the school musical, "Macbeth in Space." But the only part he can land is the FX master backstage.

Jimmy is recruited by the most prestigious science college in the country to be their new superstar student. But when he gets there, Jimmy becomes the unwitting target of rival student, Seymour Nimmelfarb.

Goddard is disqualified from the Retroville Pet Show because he is not technically a real dog.

Jimmy clones himself so he doesn't have to do chores.

Sheen's dad, Mr. Estevez desperately wants to impress his son, so he pretends he is a superhero.

The kids become news anchors for a local television network.

During a class trip to a rodeo, Jimmy, Carl and Sheen fall for a cute little cowgirl named Sally.

When the entire population of Retroville is accidentally hit by Jimmy's shrink ray, the Space Bandits abduct everyone with the nefarious plan of marketing and selling them throughout the galaxy as living dolls.

Jimmy and company are invited to the home of a spoiled boy billionaire - who wants Jimmy's dog.

Jimmy tries to disprove Nick's scary tale about the Phantom of Retroland.

When the old tyrant of a hall monster leaves, Jimmy is picked as his replacement.

Bored by a class documentary on mummies, Jimmy decides to take Carl, Sheen, Libby, and Cindy along with him to see the real deal.

Jimmy is convinced that Santa Claus does not exist. To prove his theory, he travels to the North Pole where he discovers a remote toy factory.

Cindy Vortex leads a campaign to ban Jimmy from the school's science fair.

Famous film director Quintin Smithee is coming to Retroville to make his next big movie, and Jimmy, Cindy, Libby, Sheen and Carl all have starring roles.

Jimmy is framed for a break in at the Retroville Bank. When Carl and Sheen attempt to free him from his incarceration, the three boys end up on a chain gang together.

Jimmy comes up with an invention that allows him to read Cindy's mind.

Jimmy creates an electronic bodyguard to protect him from a bully.

They boys use a metabolic accelerator to make them old enough to buy a violent video game.

Jimmy attempts to update the mischievous Nanobots in order to correct errors in his homework, but the Nanobots take it upon themselves to correct everything - even the human race!

Carl, Sheen, and Jimmy take jobs at a local burger joint. Jimmy transforms it to a fully automated restaurant that aims to please the customers and destroy the competition.

Jimmy's dad loses his job at the now-defunct automotive plant which means that the Neutrons may have to move to a new town. As a last-ditch effort to keep the family in Retroville, Hugh applies for a job as a toy inventor.

A new TV show turns everyone in Retroville into mindless and exceedingly cheerful zombies.