Stitch doesn't know how to take care of anything, or things that don't belong to him. He's already got Nani in trouble at the Rental Shack, by breaking the Shake Machine. However, when Richter turns up and is causing earthquakes, will Stitch be able to stop him breaking everything... Even his favourite ball?

Lilo is upset when Mertle gets a nice-looking fancy hairdo. But when she encounters a hair-eating experiment, Clip, she decides to get her revenge on Mertle by placing it in her bedroom with the plan of ruining Mertle's hair. But the plan runs amock and the experiment eats Mertle's mom's hair instead, and now the experiment is loose on the island. Now Lilo and Stitch must track down the experiment before everyone goes bald!

Lilo and Stitch have captured a new experiment, #254. He is insanely cute too, and charms all of Lilo's friends. Stitch is jealous though, so at the first chance he gets, he lets Gantu capture him.

As luck would have it, 42 hours after the experiment's activation, Mr. Stenchy releases such a foul stench, the area he releases it in is uninhabitable for decades. But without knowing of when Mr. Stenchy was activated, how will Lilo and Stitch save him before he releases the smell?

When Experiment #601 is activated, things are looking bad, as he is beating up the islanders. Stitch is ready for it, but when he eats the combination of a left tennis shoe and macadamia nuts, it creates a toxic poision, which erases all of his super abilities. Now Lilo has to retrain him from scratch, but Stitch doesn't like the idea.

Stitch won't listen to Lilo's advice about trying to see the good in people, and will go to any lengths to stop him capturing an experiment pod, including racing to a neighbouring desert island, with Lilo, Jumba and Pleakley in tow. But after the camp of the 'hunting parties' are destroyed, Stitch and Gantu blame each other. Turns out it's an experiment. Who will capture Splodyhead?

A new show called 'Look at This!' is going to be broadcast lives in the Birds of Paradise Hotel, and everyone is excited, except Lilo and Stitch. At the same time, Experiment #383 is activated and is a hynotic experiment. Hamsterviel sends Gantu after it to hynotise everyone who watches the episode of 'Look at This!'.

Things soon break into chaos when Lilo and Stitch capture Swirly from Gantu and take him home, ending up hynotised, and Swirly is recaptured. Will Lilo and Stitch realise who they are? Will they recapture Swirly and give him his one true place?

The Hula Girls have ditched Mertle for Lilo, and consequently, Lilo neglects Stitch to hang with them at the Kauai Medieval Festival. So, when Experiment #586 is activated, Stitch needs someone to capture it with. And who does he team up with? Mertle. Strangely, Stitch and Mertle are having fun trying to capture the metal eater, but this ends when it storms the Medieval Festival.

Lilo finds the pod for Experiment #509, which is a plant experiment. Lilo wants to activate to find it's true place, but Jumba won't let her and locks it up. However, when she makes a bet with Mertle, she breaks the lock and activates #509 and dubs it Sprout. But things get out of control at the Kauai Town Fair, and Stitch has a showdown with a cowboy.

Lilo is going to perform a Hula Dance, but gets angry when Stitch gets in her way. He runs away and finds Experiment #345, Elastico, who is performing at a local circus. Gantu arrives, though, and steals Elastico. The Ringmaster lets Stitch take Elastico's place. He invites Lilo to visit him, but she refuses.

Soon Elastico escapes Gantu and returns to the circus, and Lilo needs Stitch to dance, so has to look for him. But which ohana will Stitch choose?

Mrs. Hasagawa is watering her vegetables innocently one morning. However, she activates Experiment #613, Yaarp, which is designed to destroy buildings with it's sonic blasts. Lilo and Stitch are hot on it's trail, when it yarps, and because of Stitch's super hearing, Stitch is temporarily deaf. So, when Jumba says only someone with no ears could be safe from Yaarp, Pleakley is on the stage as an Experiment Hunter. Pleakley catches Yaarp, but Stitch's plan to deter Gantu away from the hunt goes wrong, and he captures Stitch. And now he is offering Lilo a trade: Stitch for Yaarp.

In a trip to the observatory, Lilo and Stitch overhear Cobra telling an astronomer about a huge asteroid heading towards Earth. Lilo and Stitch go around Kauai telling the people to evacuate with them onto their ship. Stitch also warns his cousins. However, only 6 Experiments - Digger, Swirly, Hammerhead, Sparky, Spooky and Kixx - and a surfer from the beach arrive at the ship. So, Stitch comes up with a new idea; Digger will drill a hole to the center of the asteroid, it can be smashed. Things seem to be going to plan, but they soon find out something lives on the asteroid, and their plan comes crashing down.

Experiment #602 - Sinker

Lilo is having high hopes for Keoni and his sailboat entry in a regatta, until his boat is sliced in half by Experiment #602. Soon Lilo, Stitch, Jumba and Pleakley are stowaways on a cruise ship. So while Pleakley is fascinated by shuffleboard, and Stitch digs into the buffet, Lilo must find the ship's Captain and warn him about Experiment #602.

Experiment #523 - Slushy

A giant heatwave has struck Kauai. Lilo is trying to get Stitch to try something to escape the heat, but Stitch just refuses: He's a creature of habit, and won't try new things. As he tries to get a cold sofa, he activates Experiment #509, an ice experiment from the elemental series, who has frosty breath that can transform any town into a frozen one.

Experiment #344 - Dupe

Lilo and Stitch have managed to capture Experiment #344, who can duplicate anything. This leaves Gantu feeling down, so he goes home to talk to 625 about it. However, 625 gets bored and tells him he doesn't care, causing Gantu to go off in a rage.

Meanwhile, Lilo, who has hosted a slumber party but no one turned up, decides to clone herself using #344, but Stitch jumps in the way, creating an extra 3 copies of himself, who all need training.

Gantu, in his rage, discovers 4 experiment pods: Heat, Plasmoid, Thrasher and HammerFace. He activates them and plans an attack on Lilo and Stitch. But surely 4 Stitches can beat Gantu.. Right?

Experiment #151 - BabyFier

Experiment #151, BabyFier, has been activated, and has the ability to turn adults into babies! Can Lilo and Stitch stop it before every adult on Kauai is turned into a baby again?

Experiment #608 - Slugger

After Pleakley's incompetence in baseball causes Lilo, Stitch, and Stitch's cousins to lose to Mertle's team, Lilo and Mertle arrange a rematch, with Lilo's collection of Elvis records and Mertle's collection of dolls on the line. Lilo finds Experiment #608, aka 'Slugger', and decides his projectile-deflection skills would make him an excellent pinch-hitter for her team. Unfortunately, Mertle gets her own ringer in Gantu, and makes the rematch a game of basketball instead of baseball, with Slugger on the line as well! Can Lilo and the experiments win under these circumstances, or will they need help from an unlikely source?

No Experiments Are Featured In This Episode

Stitch has been acting badly, and Nani is having trouble paying all the bills. If he keeps up the bad behavior, they will have to give Stitch away. So, to help pay the bills, Stitch goes to a scientist and admits to being an alien to be checked out for money. However, the scientist turns out to be Hamsterviel, who reverts Stitch to his old destructive programming!

Experiment #360 - Drowsy

Stitch uses a sleeping experiment to get Lilo to sleep. The only problem is he doesn't know how to wake her up.

Experiment 062: FRENCHFRY

When Nani restricts Lilo's food to healthy food, Lilo finds an experiment pod that is designed to make tasty, irresistible food, but he is secretly fattening them up to eat them. Will they be saved in time?

Experiment 355: SWAPPER

When Swapper swaps Lilo and Stitch's brains, Lilo thinks it will be impossible to get Victoria, a new girl, to think that she's not weird.

Experiment 089: SKIP

Lilo's desire to hurry and grow up is immediately satisfied when Skip, experiment 089, arrives and ages her up to a 17-year-old and then a 27-year-old. Lilo soon realizes she wants to be age 7 again because she misses out and ruins the future. She must figure out how to "reset" herself.

Experiment 505: PLOOT

When Lilo sets out to clean the pollutants from the Grotto where Pudge the fish lives, she comes across Ploot, a.k.a Experiment 505, eating all the litter around him.

Exxperiment 316: MORPHOLOMEW

(Crossover with American Dragon: Jake Long)

Lilo enters the island's skateboarding competition in an attempt to win the heart of her one and only crush, Keoni. At the same time, Jake, Gramps and Fu Dog visit the island to check out reports that magical creatures - actually Jumba's experiments -- are running rampant.

Spats

(Crossover with The Proud Family)

The Prouds pack their bags for a Hawaiian vacation on. Lilo prepares for the grand re-opening of Jumba & Pleakley's Bed Not Breakfast and eagerly awaits the arrival of their scheduled guests - Mr. Cooper, a reviewer for Relaxing Times Magazine, and the Proud Family who are attending Wizard Kelly's Smack-up Throw-down Hi-wyan Style Y'all. While trying to impress Mr. Cooper, arguments ensue when Suga Mama accidentally activates Experiment 397, "Spats" causing friction among all. It's up to Penny and Lilo to find the cure.

Experiment 322: HECKLER

Experiment 322 is activated just in time to taunt Pleakley as he makes his stand-up comedy debut at Nani's charity event. While Lilo is first amused by his off-the-cuff jabs, especially towards Mertle, she soon learns that mean words only hurt if you let them.

Experiment 267: WISHY-WASHY

Lilo learns a valuable lesson in being careful what you wish for when Experiment 267 is activated.

Experiment 540: PHOON

Lilo quits experiment hunting go to Hula Hip Hop Fusion school. Meanwhile, Experiment 540 is unleashed, causing Gantu to take a bad blow to the head. Jumba new device causes Phoon to mutate into a giant monster. And Gantu thinks thing like 625 and Hamsterveil are just figments of his imagination.

Experiment 128: BUGBY

Lilo, Stitch, Jumba, and Pleakley are turned into bugs after Lilo captures an experiment for her bug collection.

When Dr. Drakken and Hämsterviel team up to kidnap Stitch in order to mass multiply him in order to destroy the world, Kim Possible and Lilo set off to try and save Experiment 626. Jumba, on the other hand, is quite sure that a certain Naked Mole Rat is his experiment 607...

Experiment #276: Remmy | On the anniversary of the day when Lilo's ohana became broken, Lilo desides to take a nap, the day only gets worse when a nightmare causing experiment enters her dreams.

Nosy, (who escaped at from Gantu's ship at the end of Woops,) complains to Lilo about the fact that she just left all the experiments behind and never found their one true place. (Lilo and Stitch never went back and saved them). So, Lilo plans to save them, especially Angel. But when Snafu, a plan ruiner is on the loose, will Lilo be able to save Stitch's cousins?