Flint creates an invention to take out the garbage, but it soon starts deciding for itself what - and who - counts as garbage.

Swallow Falls prepares to celebrate the birthday of its oldest sardine, a wish-granting fish named Johnny, but Flint and Sam put the entire event in jeopardy.

Flint and Sam reminisce about the first time they met, when they went head-to-head at the school science fair and nearly destroyed the town.

When Tim is celebrated for accidentally inventing a pencil holder, Flint gets jealous and starts to doubt his own skills as an inventor.

Flint begs Sam to let him see her most treasured possession, but when Sam relents Flint damages it, and has to find a way to make it up to her.

When Steve wins the Swallow Falls lottery, townspeople line up claiming that they are Steve's best friend, causing Flint to question Steve's true affections.

Flint and Sam babysit so they can buy a new board game, but when Brent hires them as his babysitter, 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.

Unable to wake up on time in the morning, Flint combines an alarm with rooster DNA to create the ultimate alarm clock.

Tim drags Flint out into the wilderness to participate in a Lockwood father-son tradition: trying to catch the legendary Sardemon, the largest sardine ever seen.

Sam is horrified to learn about Swallow Falls' annual sardine race, and sets out to stop the race in the name of animal cruetly.

Earl goes undercover as a female student named "Pearl" in order to befriend Sam and find out what Flint's planning to invent next.

After being teased for being too similar, Flint and Sam set out to prove that they're totally different and have other friends.

Flint accidentally combines himself with Steve, and has to learn to live with the monkey inside of him.

When Flint brags he sleep-invented the best invention ever, the Mayor sees it as a money making opportunity, and Flint has to figure out what he actually invented.

While attempting to keep Sam from moving away, Flint accidentally brings the town's sardine statue to life, who starts revealing the town's secrets.

Flint gives Sam a Cloud-Maker for their friendaversary, but Sam's new cloud friend won't leave her side.

Flint invents a toot-inducing bean in order to become cool, so his classmates will listen to him and his idea to make a science mural.

When one of Flint's inventions injures Tim, Tim's doctor says he needs to relax - and Flint has just the invention for the job!

Flint and Sam scheme to get Mr. Earl to take a day off, but when they see him going crazy with boredom they feel guilty and try to fix it.

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 instead it 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 and Gil argue over who has a better dad, setting off a secret competition pitting Tim and Mayor Shelbourne against each other, in a battle of parental prowess.

Flint accidentally makes a clone of himself and is shocked to discover his clone is more popular than he is.

Sam makes Flint a new tricked-out labcoat to replace his old smelly one, not realising it was a gift from his mom.

When Flint gets Earl in trouble with his wife, Earl demands Flint help him get back into her good graces.

Flint builds a spaceship for an Australian businessman, Mr. Zorbleck, who may or may not actually be Australian.

Tim's rebellious brother Jim comes to visit, and Jim soon becomes jealous of Tim's perfect life.

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.

Flint tells Sam the story of how, and why, he invented Ratbirds.

Flint reluctantly holds a yard sale for his old inventions, and is presented with an offer he can't refuse.

Flint visits the other inventor in town to view his newest ideas, insisting he's honour bound to help his fellow inventors, no matter what.

When Flint and Sam expose that Brent is no longer a baby, causing his role of Baby Brent to be re-cast, he blames them for ruining his life and insists they fix it.

Flint and Sam find an adorable lost cat, and Sam sabotages all of their efforts to find the real owner so she can keep the cat for herself.

When Sam predicts that a meteoroid is going to crash into Swallow Falls, she and Flint have to find a way to move the island out of its way.

When Flint is tasked with taking care of Manny's Birthday Piñata, he decides to spruce it up, believing a piñata is a type of firework.

Mayor Shelbourne tricks Flint into making a Fish-Cyborg army to patrol the school.

Flint tries to get his father to eat healthier by inveting a spray to make Tim love fruits and vegetables - but Tim falls in love with them instead.

When Sam discovers and spills the beans that the Mayor's first name is Tootsie, he makes Sam and Flint do his dirty work as punishment.

Frustrated that the town isn't appreciating the beauty around them, Sam makes Flint invent something to force them to do so.

Flint asks Sam to train him for the annual father/son horsehoe contest, which uncovers Sam's troubled past with the sport.

Flint introduces Sam to Swallow Falls' unique Christmas traditions, centered around the mythical Lobster Claus.

Santa arrives in Swallow Falls to challenge Lobster Claus and take back his turf.

Flint invents a time machine to make his father like desserts and therefore let Flint have them, but meddling with Tim's past has unintended consequences.

Finally fed up with the town not appreciatting his ideas, Flint and Sam move to the other side of the island to take up an inventing-free life.