When Jimmy hides a time displacement device in the teachers' transportation to the annual education convention, the entire faculty of Lindberg Elementary is sent into temporary time limbo.
Jimmy places a funny chip into Hugh's new Flippy puppet when he insists on using it for Career Day at school. But Jimmy soon learns that Flippy is stealing his dad's mind and has to save him before Flippy disposes of him.
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.
The evil Jimmy clone is back, and he's reconfigured the cloning device to make an evil clone of the Earth with an alarming side effect – the real Earth is starting to disappear.
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 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.
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.
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.