An accident-prone yellow sea sponge, who works in a fast-food restaurant, has adventures with his friends in the underwater city of Bikini Bottom.
SpongeBob throws away Mr Krabs' old mattress - the one that he kept all his money in - in 'The Lost Mattress', and then in 'Krabs vs. Plankton', Plankton slips and sues The Krusty Krab for damages.
Squidward gets hooked on games in 'Skill Crane', and then in 'Good Neighbour', Squidward's perfect Sunday is ruined by SpongeBob and Patrick, the Good Neighbour Club.
Mr Krabs retires and sells the restaurant in 'Selling Out', and then in 'Funny Pants', Squidward has finally had just about enough of SpongeBob's annoying laughter.
Patrick gets bumped on the head, and turns into a brilliant intellect in 'Patrick Smartpants', and then in 'Squidbob Tentaclepants', SpongeBob and Squidward get merged together!
When SpongeBob forgets to feed Gary, he runs away to downtown Bikini Bottom and the very comfortable house of a kindly old woman.
After a freak jousting accident at a medieval restaurant, SpongeBob and Patrick are transported to a historical Bikini Bottom, where they are mistaken for great knights.
Mr Krabs decides to make even more money by opening a hotel in 'Krusty Towers', and then in 'Mrs. Puff, You're Fired', SpongeBob's boating teacher is finally relieved of her duties.
SpongeBob's spatula breaks and needs replacement in 'All That Glitters', while in 'Wishing You Well', Mr. Krabs sends SpongeBob down in a bucket to collect coins from a wishing well.
Squidward swallows his clarinet and Sandy offers to shrink herself into a mini submarine to get it back in 'Squidtastic Voyage', then in 'That's No Lady', Patrick thinks he's a wanted starfish.
SpongeBob's favourite jellyfishing net goes missing in 'The Pink Purloiner', and then in 'Squid Wood', SpongeBob decides that if he can't hang around with the real Squidward, he'll make his own.
SpongeBob hears that a ferocious biker gang is coming to town in 'Born To Be Wild', and then in 'Best Frenemies', Mr Krabs and Plankton work together to investigate a new kelp smoothie store.