Flint and Sam remember when they nearly destroyed the town while competing with each other in the science fair.
Flint and Sam baby-sit so they can buy a new board game, but when Brent hires them as his baby sitter they have to decide whether the humiliation is worth the reward.
Flint modifies Sam's weather-predicting orb to predict the future, but knowing their future isn't as fun as they thought it would be.
Mayor Shelbourne brings a panda to Swallow Falls, but when the town falls under the panda's spell it's up to Flint and Sam to find out what's really going on.
Flint is excited to discover there's another inventor in town, but Sam suspects the inventor has an ulterior motive for befriending Flint.
To battle his inability to wake up in the morning, Flint combines an alarm with rooster DNA to create the ultimate alarm clock.
Tim takes Flint to the wilderness to participate in the Lockwood father-son tradition of trying to catch the Sardemon.
Earl goes undercover as a female student to befriend Sam and get inside information on Flint's next invention.
Sam is determined to stop Swallow Falls' annual sardine race, which she firmly believes is animal cruelty.
When they are teased for being too similar, Flint and Sam try to prove that they are totally different.
When Flint accidentally combines himself with Steve, he must learn to live with the monkey inside him.
After hearing Flint brag about sleep-inventing the best invention ever, the Mayor sees it as a money-making opportunity.
In trying to keep Sam from moving away, Flint accidentally animates the town's sardine statue, and it begins spilling the town's secrets.
Flint invents the hair unbalder when he realises he'll go bald one day, but Tim offers him another point of view by showing him the perks of being bald.
Sam and Flint accidentally cryogenically freeze themselves in the town's time capsule, and emerge into a post-apocalyptic future.
Flint invents a device that will put a good picture of him into the yearbook, but it also puts him in every picture that has ever existed.
Steve falls in love with the cymbal-smashing electric monkey Flint brought in to replace Steve while he was on vacation.
Flint enters his fearsome robot into a robot boxing competition, and when it comes face to face with Mayor Shelbourne's robot, the results are explosive.
Flint builds a spaceship for an Australian businessman, Mr. Zorbleck, who may or may not actually be Australian.
Tim's brother, Jim, comes to visit him.
Mayor Shelbourne buys up all the town's candy at Halloween and promises to give it all to the kid who makes it through his super scary haunted house.
While attempting to debunk Hollywood pseudoscience, Flint accidentally creates his own Frankenstein-like monster.