Episode 1
Bored by a class documentary on mummies, Jimmy decides to take Carl, Sheen, Libby, and Cindy along with him to see the real deal.
Episode 2
Jimmy's determination to captain a winning baseball team leads him to rev up the equipment with Neutronic technology.
Episode 3
They boys use a metabolic accelerator to make them old enough to buy a violent video game.
Episode 4
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.
Episode 5
Jimmy, Sheen, Carl and Captain Betty set out on a mission to capture the lake monster that has haunted Lake Retroville for at least six months.
Episode 6
Jimmy runs for class president against Sheen, Libby and Bolbi - the new kid.
Episode 7
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!
Episode 8
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.
Episode 9
A laboratory mishap exposes Jimmy, Carl and Sheen to a powerful pheromone that causes each of them to fall madly in love with the next female they see.
Episode 10
Sheen is one math test away from being left back, so Jimmy turns his Brain Drain helmet into a Brain Gain helmet and uses it on his buddy, instantly quadrupling Sheen's IQ.
Episode 11
While Judy Neutron takes a spa vacation, Jimmy invents The Maternotron 6000 to take care of the house.
Episode 12
Jimmy clones himself so he doesn't have to do chores.
Episode 13
Jimmy must help Asian Princess Peggy Tsu retrieve the Egg Drop Jade before her evil brother steals it.
Episode 14
Jimmy and Carl get caught in the middle of a feud between their dads.
Episode 15
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.
Episode 16
Jimmy must rescue Brobot's parents from the terrifying Junk Man, a galactic space scoundrel who plans to dismantle the robots and sell their parts to the highest bidder.
Episode 17
During a class trip to a rodeo, Jimmy, Carl and Sheen fall for a cute little cowgirl named Sally.
Episode 18
Cindy Vortex leads a campaign to ban Jimmy from the school's science fair.
Episode 19
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.
Episode 20
Jimmy designs a temporary remedy at the Wheezers' house so he and Carl can have fun.
Episode 21
Jimmy and company are invited to the home of a spoiled boy billionaire - who wants Jimmy's dog.
