Seth is off to his first sleepover at Nevin’s. But when Seth’s determination to have the “perfect sleepover” leads to calamity, Nevin may never get to have friends over again.
The school's Fungieball coach is missing! And worse–Seth’s mom is his replacement! Champsa, who shares a bond with Coach, teams up with Seth, forming an uneasy alliance of Sports and Science in an attempt to find Coach Croach!
Overworked radio DJ Jason Fungie needs a break, so Seth and his friends take over RFUN public radio! But when things backfire and the station is at risk of being shut down, the kids have to raise the money to keep RFUN alive!
Seth loves how fast Pam can run, and to prove she’s the fastest, creates a race all across Young Earth! But when Pam, who’s never lost a race, is challenged by a speedy newcomer, will Seth’s training be enough to make sure she wins?
Seth’s learning about Fungie history in class, but there isn’t enough history! So he assembles an archeology crew to help him dig! But when the kids unearth the ancient city of Fungopolis, will they be stuck in the past forever?
Seth gets super into solving puzzles and winds up trying to solve the ultimate puzzle: fixing Commander Beefy’s relationship with his sister, COMMANDER LAZER! Will Seth’s plan work? Or will it end up putting him and his friends in danger?
Pressured to choose a real job, Seth instead decides to be a dinosaur like Pam! Soon, all the kids follow suit, but cause so much trouble, Fungietown bans dinosaurs! But Pam can’t stop being a dinosaur and is thrown in jail!
Seth wants some attention, but his family’s too busy. But when a lucky explosion forces Cool James to stay with him, Seth gets the attention he craves! That is until Seth sees how much his family loves Cool James.
When his medals are stolen during a Fungietown school assembly, Seth and Claudette start an investigation to find the culprit before everyone is thrown into the Triloknight’s dungeon!
Sir Tree is lonely, so Seth builds a treehouse in his branches to keep him company. It’s such a hit, soon all of Fungietown moves in! But when the added weight strains Sir Tree, can Seth convince him to take better care of himself?
While playing in the river, Seth, Claudette, and Mertha discover the longest pair of Fungie legs they’ve ever seen! Now the three friends struggle over who gets to keep them.
Seth bets Mertha that with him as his campaign manager, Lil’ Lemon will beat her in the class election! But when Mertha’s dad gets involved, things get out of hand and Seth soon learns politics isn’t worth putting his friend in jeopardy!
Seth writes a play about the importance of dental hygiene and gets Pascal to direct. Soon the brothers’ differences lead to Pascal quitting. But when the star of the show gets stage fright right before curtain, Seth has to get Pascal back!
Seth agrees to take care of Sir Tree’s wooden boy, Boy Joy, but quickly pawns him off on Mertha. When Seth discovers that Sir Tree needs his boy back in order to survive, he must stage a heist to steal Boy Joy back before it’s too late!
Seth, sick of doing chores for his mom, wishes he was in charge. But when an act of kindness makes Seth queen to a hive of bees, he quickly learns: heavy is the head that wears the crown.
Seth wants to study the old well, but Nancy forbids it! So Seth lies and says he won’t. But when Pascal gets stuck in the well, Seth’s little white lie grows! Soon he has the whole town up in arms about a terrible “well monster.”
While distracted by a new scientific endeavor, Seth winds up ruining his mom’s treasured fireman calendar! After his attempt to make it up to her puts them both in danger, Seth finally learns the importance of communicating with his mom.
The kids discover that Nevin’s Granny Grancie has an estranged sister/best friend, Granny Grindle. Nevin and Lil’ Lemon, with Seth’s help, vow to reunite them! But getting these old friends back together may test their own friendship.
Seth creates The Fungie Scouts so his friends can learn how to survive in the wild. But after enlisting the selfish Commander Beefy as scout leader, the kids wind up in danger! Seth must take back control in order to save his friends!
Seth takes a baby squid from the ocean to study and ends up becoming attached to the little guy. But when Squidly grows real big and attracts the attention of an intergalactic zookeeper, Seth must free his friend in order to save him.
Seth tries to get the kids interested in his pumpkin garden by making it into a contest, but a healthy competition soon turns to all out war! Can Seth reunite the class to save the town from a new danger?
When Pam is chased by a huge scary dinosaur, a concerned Seth invites her to live with him in Fungietown. Pam adapts to city living, but the Fungies’ newfound love for Pam attracts attention, putting the entire town in danger!
Seth wants his mom to have the best birthday ever, so he creates his own currency in order to buy her an expensive gift. But he learns a little too late that counterfeiting is a crime, putting Nancy’s birthday at risk of being ruined.
Seth is having a hard time sharing a room with messy Pascal and needs a change. But instead of being honest about the situation, Seth makes Pascal a mermaid tail so that his brother can finally move out - into the ocean!
When Pascal becomes obsessed with a group of cool kids, Seth promises to use his science skills to help Pascal become cool. But is coolness as cool as it seems?
After a beautiful statue makes Nevin self-conscious about his own looks, Seth helps seal Nevin in a cocoon so that he may turn into a beautiful butterfly.
When Seth agrees to let an athletic snake replace his arm so he can finally be good at volleyball, he learns he doesn’t need a fancy snake arm to make his teammates happy; he just needs to try.
Seth, frustrated that the Fancies are too caught up in the Fanciest Fancy pageant to listen to his warning about a fungus-eating bacteria, enters the pageant to get his message out. But when he gets sucked into the pageant, he’ll have to face the consequences of getting distracted.
Seth, eager to explore the stars and find a fellow explorer, sends a signal to space. But the explorer who receives the message, Commander Beefy, has his own shady plans for Earth.
Seth wants to help sad, immobile Sir Tree feel the joy that comes from helping others, so he has the brilliant idea of planting Sir Tree inside Pascal’s body! But when Sir Tree’s absence causes soil erosion and mudslides, Seth has to convince Sir Tree that the best way to help is to return to his hole before Fancytown is destroyed.
Hide and Pam: Pam learns to play hide and seek a little too well./Chair Factory: Seth improves productivity at the Fancytown chair factory./Turtle: Seth brings a shy turtle for show and tell./Rainy Day: Cool James teaches the other kids how to have fun making music on a rainy day./Best Friends Club: Lil' Lemon and Nevin hold the first meeting of the Best Friends Club.
Seth leads a group of kids into a haunted mine in an effort to prove that everything has a scientific explanation and that there’s no reason to be afraid ghosts. But things get spooky when they encounter a ghost that Seth doesn’t have a scientific explanation for. Seth has to learn to give into his fear in order to and solve the mystery of the mine ghost.
Seth neglects his baby-sitting duties to do his own thing and winds up losing the twins to an army of ants! On his undercover mission to get back the Twins, Seth learns to appreciate his siblings even if they’re a little annoying at times.
Seth and Claudette are given a weekend project as punishment for disrupting class. But when Seth finds himself marooned on a boat in the middle of the ocean with Claudette, will he finally learn to listen? Or will the huge storm sink their ship?
Seth’s desire to help Nancy with her job at the hospital results in chaos when he, without Nancy’s knowledge, plays doctor on sick Fancies. Seth has to admit his wrongdoing and listen to his mom in order to set things right.
When Seth borrows Pascal’s mustache for a day at the beach, the Triloknights think he’s an adult! While Seth loves the respect and attention, is he really ready for adulthood? And marriage?
While exploring, Seth finds an egg and really wants to know what’s inside it! But when Pam’s egg-hatching instincts kick into gear, Seth will have to learn to trust her, and nature.
On the verge of a scientific discovery, Seth and the other Fancies are forced inside when the town is invaded by cow-like Truffalo! But when Seth traps the Truffalo in order to resume his science, he causes an environmental chain reaction that threatens to destroy Fancytown.
Seth, desperately wanting his classmates to pay attention to the presentations he’s excited to share with them, pushes himself too hard and gets sick! It takes a face-to-face encounter with his rival to show Seth that it doesn’t matter what his classmates think, as long as he likes what he’s doing.
Seth wants to bring snow home so it’ll earn him a coveted spot on his mom’s prized shelf of "stuff her kids gave her." When he repeatedly tries and fails to bring the snow back befoe it melts, he uses science to figure out a way to get it home intact.
