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.

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

Flint invents a way to make sardines taste like bacon so Sam can eat one without gagging, but Flint's invention has a few bacon-related side-effects.

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.

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.

To stop himself from being late for school, getting into more trouble, and missing all the fun, Flint decides to create a robo-rooster alarm from getting late for school.

Tim drags Flint out into the wilderness to participate in a Lockwood father-son tradition: catching the legendary Sardemon, the largest sardine in existence.

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

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 gives Sam a Cloud-Maker for the anniversary of their friendship, but Sam's new cloud friend will not leave her side.

In a bid to make his classmates consider his idea for a science mural, Flint creates a toot-inducing bean.

After being inured by one of Flint's inventions, Tim's doctor wants him to relax, and Flint has just the thing to help.

After encouraging Mr. Earl to have a day off, Sam and Flint learn he is too bored, and try to make things better for him.

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 brother, Jim, comes to visit.

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 shares his tale of how he invented Ratbirds.

Flint is made a tempting offer when he sells his inventions at a yard sale.

Flint feels obligated to help out another inventor in town.

Brent is furious when Flint and Sam expose that he is no longer a baby.

Flint and Sam find a lost cat, and Sam sabotages efforts to find the owner so she can keep it.

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

Flint decides to have some fun when he is in charge of a birthday piñata.

Flint is fooled into creating a fish-cyborg army for Mayor Shelbourne.

Flint tries to get his father to eat healthier by inventing a spray to make Tim love fruits and vegetables.

Sam discovers and spills the beans that the Mayor's first name is Tootsie.

Frustrated that the town doesn't appreciate 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 horseshoe 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.

Flint invents a time machine to make his father like desserts.

Flint and Sam move to the other side of the island to take up an inventing-free life.

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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.

Gil finds Flint's most prized possession, Einstein's moustache, and he starts wearing it.

When Flint's inventing makes the power bill skyrocket, Tim takes the Lockwood house off the grid.

Flint helps Brent with his science project, inadvertently inventing a cool new element in the process.

Sam receives a pet penguin from her Pet of the Month Club.

Mayor Shelbourne suffers a crisis of leadership when Flint beats his high score on the arcade's most difficult game.

When Flint totals Tim's boat, he uses a ray to make his dad forget about the crash.

Flint invents a machine to bring Sam's imaginary friend into the real world.

Flint realizes that all of the world's great inventors have large hands, so he invents a way to supersize his own mitts.

During Swallow Falls' annual Brent Hog Day festivities, Sam sets out to reveal that the beloved celebration is a scam.

When Flint creates an invention to make Earl believe his son, Cal, can talk, Earl goes overboard showing off his genius baby.

When Mayor Shelbourne incorrectly believes Flint's invention has made him invisible, he lives out his dream and goes on a tear through the town.

Desperate to make science interesting to his peers, Flint creates the superhero alter ego "Major Science."

While trying out an invention to help his dad learn to swim, Flint accidentally turns Tim into a fish.

When Shelbourne confiscates Flint's beloved new invention, Sam organizes a heist to get it back.

When Flint's new invention gives Gil some much-needed confidence, the mayor demands a moxy-boost of his own.

Sam tries to help a new student settle into Swallow Falls.

When Sam decides she wants a cool nickname, she and Flint struggle to jump through the hoops required to earn it.

Brent offers to rid Flint's lab of a squirrel infestation.

Flint and Sam enter Brent's dreams to determine the source of Brent's sudden fear of sardines.

Flint suspects that Shelbourne may be a robot.

When the Fizzy Fish soda corporation takes over Cannery High, Flint and Sam take their protest right to the top.

Flint revolutionizes transportation in Swallow Falls by harnessing the power of ratbirds.

When Tim brushes off his guitar and revitalizes his classic rock act, Flint attempts to modernize his dad's outdated sound.

Tired of being the butt of the world's jokes, Swallow Falls comes together to try to show how great their island really is.

When Mayor Shelbourne throws out Gil's favorite Poppa Piglet toys, Gil leaves home and moves in with Flint.

Flint dons a worm suit to try and drum up business for his dad's bait shop.

Flint tries to make up for missing Sam's birthday, but she's too busy tracking a big news story to notice.

Flint's creation of an AI alter ego backfires when his computerized self starts taking over the real Flint's life.

Flint invents a device to help his father end his fishing dry spell, but the special lure ends up attracting people instead of sardines.

When Flint and Brent suspect their parents are dating, Brent takes Flint under his wing.

When a local fast food joint starts including Sardinee Babies in their meals, Sam and Flint compete to collect all 37.

Sam pretends to be Flint's new robot, but finds herself in peril.

When Flint's day at the beach goes sour, his dad encourages him to adopt a new 'Say Yes' attitude.

After destroying the town yet again, Flint does his best to be an ordinary kid.

Flint's new invention transports the user into any TV show they choose.

Hector tricks Flint into helping him win a spot on the Shelbourne Walk of Fame, endangering the whole town in the process.

Tired of Shelbourne's greedy taxes, Flint convinces his father to run for mayor.

Sam starts hanging out with a gang of gruff fishermen to get to the bottom of their uncanny ability to predict the weather.

Brent and Flint get stuck up a tree together after one of Brent's jokes goes too far.

Tensions arise when Tim's jealous brother Jim visits with his flirtatious new fiancée, Kim.

Flint, desperate to find out what Sam's giving him for his birthday, invents a device to read her diary out loud.

When Flint discovers his father only sees shades of grey, he sets out to blow Tim's mind with a device that lets him see color.

Tim discovers a mermaid in the ocean, but skeptical Flint doesn't believe they exist.

Mr. Earl thinks of himself as the healthiest person in Swallow Falls, but he's hiding a delicious, frosting-topped secret.

Gil takes over as principal and, much to his dad's surprise, actually improves the school.

Nothing embarrasses Brent, until he tries out Flint's new self-awareness-creating invention and becomes horrified by his boorish ways.

Flint thinks his new series of interactive science exhibits is truly making a difference, but he's actually just created a bunch of carnival rides.

Flint gets jealous when Tim takes Brent (and a growing group of townsfolk) under his fatherly wing.

Townspeople recount their versions of how the island of Swallow Falls came to be.

Flint creates a machine that predicts a person's future occupation, and is surprised by his own result.

Sam discovers that Santa Claus is vacationing in Swallow Falls and drags Flint along to pitch their Christmas ideas to the jolly old elf.