Como Jimmy é um cientista, ele tem coisas mais importantes a fazer do que pegar nas calças - como inventar um dispositivo que faça essa tarefa para ele. Mas quando o nanochip desenvolve capacidade cerebral avançada, as calças de Jimmy lideram um ataque à cidade de Retroville!

Jimmy está cansado de ser um gênio, então decide esgotar seu cérebro até a capacidade normal. Mas quando um grande meteoro vai direto para Retroville, quem salvará o dia?

A turma da senhorita Fowl tem um concurso de venda de doces, sendo o grande prêmio uma viagem para Retroland! Para vencer Cindy no concurso, Jimmy inventa um robô programado para vender doces de qualquer maneira.

Em seu laboratório, Jimmy constrói o irmãozinho perfeito que nunca teve, "Brobot".

Para resolver uma discussão com Cindy, Jimmy leva Thomas Edison para a escola.

A avó de Jimmy vem visitá-la e ele lhe dá sua nova poção tônica para a juventude.

Jimmy viaja 15 anos no passado, numa época em que seus pais eram namorados.

Jimmy e Cindy são forçados a colaborar em um projeto científico envolvendo um tesouro escondido.

Jimmy invents the Dream Injector 5000 and enters Carl's dream to figure out what he is afraid of.

A tentativa de Jimmy de esfriar a onda de calor do verão resulta em uma nova Era Glacial.

Jimmy, Carl e Sheen formam uma banda para derrotar Cindy e Libby no primeiro prêmio do concurso de talentos.

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

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

Jimmy's teleporting goof-up leads to him switching heads with Carl's pet hamster.

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

In order to get his new chemistry set right away, Jimmy hypnotizes his parents.

Jimmy comes up with a snack that is even tastier than everyone's favorite.

Miss Fowl swallows a seed from Jimmy's DNA-accelerated spinach plant turning her into a 50-foot plant.

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

Sheen's oldest and most prized UltraLord is missing! It's up to Jimmy, playing a high-tech Sherlock Holmes, to find it.

Jimmy creates a "get out of school sick" patch.

Hugh takes Jimmy, Sheen, and Carl on a camping trip into the wilderness, allowing no technology whatsoever. So what will save them when a big problem comes along?

Sheen and Carl convince Jimmy to throw a party when his parents go out to watch Ducks. But when Hugh and Judy come home early, how can Jimmy convince his guests to leave?

Jimmy uses his Neutronic Game Cube to send Sheen into his favorite Ultra Lord video game.

Jimmy lands the spot of host on Lindbergh Elementary's Public Access show! When the show fails miserably, Cindy and Libby are brought in as producer and co-star, changing informative Science With Jimmy to flashy Funky Jam Dance Party (with some science).

The mad Professor Finbarr Calamitous schemes to make Jimmy his "scientific slave."

At the parent-child picnic, Jimmy gives his dad a bionic sweatband to help their team beat Cindy's.

Jimmy is hosting a sleepover with Carl and Sheen! To make it the best slumber party in history, Jimmy invents a machine to make perfect pillows for pillow fights, create made-to-order pizzas, and tell scream-your-head-off scary stories. But what happens if the invention is overloaded and the programs mix up?

The Father's Day talent show is a few days away so Jimmy invents a device that turns dorky Hugh into the coolest dad in Retroville.

Jimmy, Carl, Sheen, Cindy, Libby, and Goddard blast off into space in Jimmy's newly invented spaceship to mine for aster-rubies while fighting off space bandits and their own greed.

Jimmy invents the Quantum Replay 9000 which enables him to go back in time. Hugh accidentally sends Jimmy, Carl, and Sheen back 200 million years.