||September 20, 2003
||The show's premiere episode. An earthquake rocks the island, prompting Pleakley to study earthquake safety. When it is discovered that the earthquakes were caused by an experiment, Lilo and Stitch must travel underground to catch it before it cracks the Earth in half (and before Gantu catches it).
||September 27, 2003
||Stitch wins an oyster containing a hidden experiment pod at a restaurant crane game. When the pod gets wet, however, the ghostly experiment possesses Scrump the doll and causes all sorts of mischief. When Stitch is blamed, he must prove himself innocent by catching the experiment in the act.
||October 4, 2003
||After causing chaos at a beauty salon, Lilo and Stitch meet the hair-eating experiment that made Jumba nearly bald. However, when they try to use it to get revenge on Mertle for her cruel words, the hairball gets loose and threatens to eat up all the hair on the island. Meanwhile, Jumba regrows an Afro and Gantu gets stuck dancing at a luau. In the end, Clip becomes good and is repurposed to give people the perfect haircut. When Jumba gets his Afro cut, he is given back his normal three hairs and realizes that's how he likes it.
||October 11, 2003
||Lilo rescues an irresistibly cute experiment, takes him home and names him Mr. Stenchy. Lilo falls madly in love with Mr. Stenchy and wants to keep him, but Jumba warns her that the new experiment is a walking stink bomb and will release a terrible odor soon, so he has to send him back into space. However, Lilo is invited to Mertle's FHGH (Future Hawaiian Girls of Hawaii) tea party if she brings Mr. Stenchy along, so Jumba allows her to keep him for 24 hours. Stitch is jealous of the attention Mr. Stenchy receives and allows Gantu to capture him. Gantu then develops an affection for the cute experiment, making 625 jealous as well. Lilo and Stitch rescue Mr. Stenchy as he begins to release the odor. Jumba puts Mr. Stenchy in a rocket and sends him to Pleakley's home planet, where the odor is considered a rare and valuable perfume.
||October 12, 2003
||In this Halloween episode, an experiment that can morph into a person's worst fear is discovered. It is revealed that Mertle, Elena, Teresa and Yuki's worst fear is seeing Lilo without her head; Moses' worst fear is spiders; Lilo's worst fear is clowns; Stitch's worst fear is water; Nani's worst fear is losing Lilo (especially hearing Cobra Bubbles say he came to take Lilo away); Jumba's worst fear is his ex-wife; and Pleakley's worst fear is his mother scolding him for being a failure.
||October 12, 2003
||Mertle receives a charm bracelet for her birthday, but one of the charms is actually an experiment pod. Lilo and Stitch must try to retrieve it before she gets it wet, or else the universe will be sucked into a black hole. Meanwhile, Nani must prepare for a company inspection; however, Lilo keeps getting caught by Officer Kahiko, leaving Nani to shirk her duties. Fortunately, with Jumba's help, Lilo and Stitch manage to defeat Holio's black hole.
||October 13, 2003
||A tsunami-creating experiment appears with the threat of endangering the entire world if it reaches the ocean. Lilo and Stitch must use the newly designed X-Buggy to capture Cannonball before Gantu does. Meanwhile, Lilo's hula halau participates in a sand-sculpting contest.
||October 13, 2003
||Mertle mistakes an experiment for a dog, names her "Gigi" and enters her in a dog show in Honolulu, while Lilo enters Stitch in the same dog show in hopes of beating Mertle and winning her respect and friendship. Stitch, however, has to control his anarchic instincts if he wants to win at all. Everything goes smoothly until Mertle decides to cheat, putting the whole contest in jeopardy. Meanwhile, Jumba and Pleakley go sightseeing around the city and run into Gantu.
||October 17, 2003
||Two experiments activate at the same time while Lilo and Stitch are arguing. Lilo and Stitch insist that they each can catch an experiment without the other. Meanwhile, Jumba and Pleakley make a bet to see which one will capture an experiment first, and Gantu forces Reuben to help him catch them both. The race is on because Jumba theorizes that the world will be doomed if the two elementally opposing experiments touch each other, they will destroy Earth. Eventually, Lilo and Stitch team up together again and help each other capture the experiments each was after using the "tools" that were given to them by Jumba and Pleakly. Lilo names the two experiments Yin and Yang and repurposes them to create a new island.
||October 20, 2003
||A combatant experiment causes trouble by bullying people around the island, and a chemical reaction from a bad snack combination results in Stitch losing his ability to fight. Lilo must re-train him so that he can defeat Kixx before Gantu does.
||October 24, 2003
||In order to catch a plasma-shooting experiment, Lilo, Stitch, Jumba, Pleakley, Gantu and Reuben travel to the island of Niʻihau. After becoming stranded on the beach under the threat of being blasted by Splodyhead, the two opposing teams become one "tribe" and are forced to work together to survive. This initially doesn't go well as Gantu and Stitch both want to be the leader until Reuben nominates Lilo. Under Lilo's leadership, the group manages to disable Splodyhead's powers, causing him to flee, but he's captured when Gantu and Stitch team up together against him. Gantu gets the experiment, but when David and Nani show up to rescue Lilo, Stitch, Jumba and Pleakly, they only agree to help him and Reuben back to shore if he gives them the experiment, which he reluctantly does.
||October 27, 2003
||It is Lilo's birthday, but no one seems to remember. While she and Stitch hand out invitations for their own party, they encounter Gantu as well as an experiment that gives people amnesia. All three of them try to catch Amnesio, which causes them to lose their memories of each other. Now thinking that her name is Martha, Stitch is an escaped convict, and Gantu is her partner cop named Lenny, Lilo teams up with him to hunt down Stitch and find clues to their lost memories.
||November 3, 2003
||A popular television show called Look at This! comes to Hawaii as a hypnotizing experiment is activated. Lilo and Stitch hate the show, but Lilo falls under Swirly's spell and is instructed to be more like Mertle, who happens to love the show. Stitch also falls under Swirly's spell and is instructed to love the show. Hämsterviel orders Gantu to go on the show and use the experiment to hypnotize the viewers, thus bringing them under Hämsterviel's power. Jumba frees Lilo and Stitch from the hypnosis and they rescue Swirly just in time and leave Gantu stranded in front of a live audience. Stitch later throws a party he won from the show, and Mertle is hypnotized by Swirly into thinking she's a chicken.
||November 7, 2003
||Pleakley's mother calls to inform him of his arranged marriage, so he lies that he is engaged to an Earth girl. When his family comes to the Pelekai residence for the wedding, though, Pleakley must pretend that Nani is his fiancée. Meanwhile, Lilo and Stitch must keep an experiment that always beeps when a person makes a lie under wraps, which Gantu later finds out about after returning from a spa weekend. Eventually, the truth is exposed and Pleakley's family accepts him for who he is, while revealing that while all are successful, they are actually envious of him. Gantu ends up taking Fibber, but Lilo and Stitch let Gantu keep him.
||November 10, 2003
||Lilo wins tickets to the Elizabethan Fair and invites Elena, Teresa, and Yuki to join her. However, Mertle refuses to go because she does not want to be with Lilo, and Stitch is not allowed inside because no dogs are admitted. They team up to catch a metal-eating experiment on a rampage. Eventually, Gantu is allowed to capture Tank in order to save Mertle and Stitch. The hula girls take Mertle back, and Lilo apologizes to Stitch for neglecting him.
||November 14, 2003
||Lilo makes a bet with Mertle to win the orchid competition at the Kokaua Town fair and steals a dangerous plant experiment against Jumba's warnings, while Pleakley grows a giant "Pinormous" pineapple and Stitch practices being a cowboy for the rodeo. However, when Sprout gets loose (thanks to Mertle) and spreads his roots all over the fairgrounds, Stitch must defeat him cowboy-style.
||November 17, 2003
||Lilo ignores Stitch while working on a new hula dance. Stitch finds a cousin performing as a circus entertainer and when he attempts to capture Elastico, he is adopted as a circus performer himself. Gantu captures and nearly sends Elastico to Hämsterviel, but he manages to escape and returns to the circus. When Lilo realizes that Stitch has left, she apologizes to him for ignoring him and convinces him to stay in Hawaii and not travel with his new circus family.
||November 21, 2003
||Lilo's idea for an alien invasion alarm to improve the hula school is rejected, so she tries to write a letter to the mayor about it. Meanwhile, a loud, sonic-blasting experiment causes Stitch to temporarily lose his hearing, so earless Pleakley is given the job of capturing Yaarp himself. While Pleakley is off looking for Yaarp, Gantu captures Stitch and will not let him free without a trade.
||November 24, 2003
||Stitch becomes egotistical after beating his experiment catching record, so Jumba decides to teach him a lesson by activating his brand new experiment, 627. Being more powerful than Stitch with none of his weaknesses, Stitch may meet his match when 627 escapes Jumba's custody and falls into the hands of Gantu. 627 works for Gantu capturing experiments and proves unbeatable until Reuben, who's had enough of 627's abuse, calls Lilo and reveals that 627's weakness is laughter. Lilo and Stitch use this to defeat 627, and as it is impossible to turn him good, they use a dehydrator to turn him back into a pod. However, Jumba is shown to have an Experiment 628 whose pod he stores on his ship.
||December 1, 2003
||Lilo and Stitch visit a planetarium and overhear Cobra's warning of an asteroid that will impact Earth. With no one believing them or bothering to seek shelter, Stitch formulates a plan to go into outer space and destroy it to save the planet. However, when they discover that the asteroid itself is home to an alien, Lilo and Stitch must decide which home they must sacrifice for the sake of the other. In the end, the group uses Jumba's ship's hyperdrive to safely push the asteroid away from Earth without destroying it, but leaving Jumba and Pleakly permanently stranded on Earth. Meanwhile, Lilo and Stitch become honorary agents.
||December 5, 2003
||It is Christmas Eve, and Lilo is trying to teach Stitch how Hawaiians celebrate Christmas, but Stitch becomes overly obsessed with the Christmas gifts. Jumba and Pleakley attempt to get into the Christmas spirit as well. However, when Gantu has an experiment pod giftwrapped for Hämsterviel, everyone mistakes Stitch's hunt for the box as a selfish attempt to hoard presents for himself.
||December 8, 2003
||While trying to catch a melting experiment, Lilo falls into a puddle of mud in front of Keoni. To try to erase her embarrassment, she uses Jumba's time-traveling invention. Each time she tries to change the past, it creates a progressively worse future. Finally, Lilo realizes that she must live events as they were meant to occur and repeats her embarrassing fall. However, Keoni later shows up to cheer her up.
||December 12, 2003
||Stitch and Pleakley are hired to do a magic show at Mertle's "half-birthday" party. After their act turns out to be horrible, Lilo secretly activates an experiment that turns things invisible to help make the show a success. When it is, Mertle's aunt, a Hollywood producer, hires them to do their trick on national television. However, when Houdini runs away and leaves Stitch invisible, Lilo tries to find them both before she looks like a fraud. Meanwhile, Reuben finds 119's experiment pod at the grocery store, thinking it is 611's pod, but Gantu takes all the credit for it while trying to find Houdini. In the end, Houdini arrives just in time to make the disappearing lighthouse magic trick work. He is then revealed to be the true magician and gets a magic show with Mertle's aunt.
||December 15, 2003
||A small, purple shark-like experiment is destroying and sinking enemy ships with his large dorsal fin. Lilo and Stitch must find a way to control Sinker before he sabotages the boat racing competition (and before Gantu catches him). His one true place is at a Japanese restaurant, where he uses his large fin to cut up fish fillets and vegetables for the chefs to make sushi. Meanwhile, Gantu and Reuben end up stranded on a small island after losing several boats.
||December 19, 2003
||Nani invites her prospective boss home to demonstrate the spirit of ʻohana. Lilo has a crush on the boss's son Keoni. Before the visit, they find an experiment that is designed to snoop around and dig up dirt on the enemy. The experiment is so annoying that Lilo and Stitch give Nosy to Gantu. Nosy then annoys Gantu and Hamsterviel so much that they release him. He returns to Lilo's house just in time to finish the visit with Nani's boss. In the end, Nosy returns to Gantu's ship and spreads rumors about Gantu to Reuben.
||December 22, 2003
||Stitch becomes jealous of a new experiment when Lilo takes Finder to show-and-tell instead of Stitch. Meanwhile, Dr. Hämsterviel escapes from prison and travels to Earth, where he is "adopted" by Mertle. While the Grand Councilwoman offers to reinstate Gantu's position for the capture of Dr. Hämsterviel, Stitch strives to upstage Finder by finding him first. Mertle is captured by Gantu by accident and Stitch and Finder team up to rescue her, with Finder flying Stitch to Gantu's ship. Stitch disables Gantu's ship and Mertle is rescued, while the Grand Councilwoman takes Hämsterviel into custody but doesn't reinstate Gantu due to him kidnapping Mertle. Finder is put to work running a Lost and Found at the beach.
||December 26, 2003
||A freeze-inducing experiment is activated during a very hot day and chills the weather so much that it produces Kokaua Town's very first snowfall. Lilo and Stitch soon capture Slushy and take him home, where he makes it snow for them to play and have fun. Gantu later kidnaps Slushy and forces him to create an impenetrable ice fortress. Slushy also engages in battle with Splodyhead, who ends up winning and restores the tropical climate to the island. Slushy is found a one true place creating Shave Ice at the ice cream shop.
||December 29, 2003
||Lilo hosts a slumber party, but none of her classmates from hula school come. When she finds an experiment that creates duplicates, she tries to clone herself so that she can have friends. Stitch saves her, but is cloned instead. Stitch is weakened by the duplication when his strength is divided among all the clones. Gantu is able to use several experiments to capture Stitch. Lilo tricks Gantu into using Dupe to turn his few experiments into an army and then merges the Stitches back into one full-strength Stitch.
||January 2, 2004
||Lilo takes Stitch to a carnival, but Stitch is too short to go on any of the rides. Meanwhile, a small crab-like experiment that fouls up machinery is activated. Pleakley uses Jumba's invention without his permission to make Stitch grow, but Gantu interrupts and Stitch grows too big. Then, Shortstuff is also enlarged, and the two giants battle each other back at the carnival. Shortstuff is defeated after Stitch returns to normal size and becomes a new ride at the carnival, thanks to his giant size. Meanwhile, 625 seeks to eat the world's largest sandwich.
||January 5, 2004
||Stitch falls in love with a female experiment that looks like him and names her "Angel", but Lilo is both jealous and suspicious of her. When she later looks up Angel on Jumba's computer, she discovers that the experiment turns good experiments back to evil by singing her siren song and is working for Gantu. Stitch runs after Angel and finds out the truth too late. Now, it's up to Lilo, Jumba and Pleakley to save Stitch before the other experiments turn on their own cousin.
||January 9, 2004
||Gantu found an experiment and let it go, but it is found by Lilo and taken to her home, where she names him Felix. Felix is an experiment mad with cleanliness and cleans everything, to the point that Felix becomes very good friends with Pleakley. However, Felix is such a neat freak that he thinks all around him are dirty and now wants to destroy Lilo, Stitch and the others. Now, Lilo and Stitch must save everyone from Felix's mania and clean the home before Nani returns.
||January 11, 2004
||A small microbe-like experiment enters Pleakley's body, causing him to fall deathly ill. Lilo and Stitch must remove it quickly while inside his body because their shrinking effect is only temporary, and Pleakley will explode if they do not get out in time. To make matters worse, Gantu is after Poxy and kidnaps Pleakley due to him being infected with the experiment. Now, Lilo and Stitch must save Pleakley before Gantu sends him to Hämsterviel.
||January 11, 2004
||It is Valentine's Day, and Lilo uses an experiment that causes people to fall in artificial love in order to make Keoni fall in love with her. However, when Lilo accidentally lets Hunkahunka loose, the experiment causes more trouble by making everyone fall in love, and Lilo soon feels bad about forcing Keoni to like her. Now, Stitch must catch Hunkahunka before Gantu does.
||January 11, 2004
||Stitch is afraid of going to the vet when Lilo has to take him to get his shots, and they end up meeting an experiment that can repeat any sound it hears. Meanwhile, two alien hunters named Merwin and Dean try to capture Stitch, Sample and Gantu in order to take them to an alien convention and prove that aliens are real, which causes problems for the extraterrestrial characters.
||January 12, 2004
||An experiment that regresses people into babies activates and turns Stitch, Nani, Jumba, Pleakley and Gantu into infants, forcing Lilo and Reuben to babysit them (Gantu for Reuben, and everyone else listed for Lilo). When Babyfier gets loose, Baby Stitch and Baby Gantu battle for the experiment, while Baby Pleakley and Baby Jumba (who still has the intellect of adult Jumba) have to mix an antidote for the age regression, requiring adult coffee in the remedy. In the end, Stitch unleashes it and everything goes back to normal (except Gantu, who remains a baby for now). Meanwhile, Babyfier is given a job at the dog pound turning old dogs into more adoptable puppies.
||"Bonnie & Clyde"
||January 16, 2004
||After being grounded for being rowdy, Lilo and Stitch sneak out of their house and soon meet a criminal experiment duo, who urge them to do whatever they want and convince them that it won't do any harm. After causing trouble around the island and realizing the consequences of their naughty behavior, though, Lilo and Stitch decide to capture the two crooks to redeem themselves. They pretend that they are working with Bonnie and Clyde again, but once they are taken to their hideout, they capture the thieves who are then taken to their one true place: prison. As for Lilo and Stitch, they have to clean up the mess they made as repayment for their crimes.
||January 26, 2004
||Lilo's baseball team loses to Mertle's team, due to Pleakley's lack of confidence. Later, Lilo and Mertle make a bet for another game, and that whoever wins the game will get the other player's personal items. Then, a small yellow, pterosaur-like experiment that is designed to deflect projectiles with his baseball bat-shaped tail activates. Lilo decides to place Slugger on their team in Pleakley's place, in hopes of beating Mertle's team. But to make matters worse, Mertle has placed Gantu on her team, who has promised to help her win the game with a bargain to achieve Slugger in the end. Mertle ends up changing things so they play basketball instead of baseball, but Pleakley saves the day as he turns out to be a champion player of a similar game on his home world.
||January 30, 2004
||Nani has been receiving a lot of bills for Stitch's destruction and unruly behavior, so she gets Lilo to try and train him to be more civilized (otherwise, she will have to get rid of him forever). When Lilo's attempts prove to be unsuccessful, Stitch decides to find a way to make money for the Pelekais and ends up being kidnapped by Dr. Hämsterviel, who plans to turn him evil again. Now, Lilo, Jumba and Pleakley must rescue Stitch before it's too late. Meanwhile, after getting fired by Hämsterviel, Gantu searches for a new job.
||February 28, 2004
||Stitch uses a sheep-like experiment to get a restless Lilo to fall asleep, but is unable to wake her up the next day. While he is forced to use her sleeping body as a puppet to complete her responsibilities, Gantu is instructed to capture Drowsy and kidnap the vacationing Regis Philbin.