The following is a list of Lilo & Stitch: The Series episodes.
Note that Stitch, Experiment 626, appears in every episode, so he is not included in the "Experiments Mentioned" list.
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).
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.
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 lose 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 hair cut, he is given back his normal three hairs and realizes that's how he likes it.
Lilo rescues an irresistibly cute experiment. Jumba warns that the new experiment will release a terrible odor soon. However, Lilo is invited to Mertle’s FHGH (Future Hawaiian Girls of Hawaii) tea party if she brings the adorable experiment. Stitch is jealous of the attention received by the new experiment and allows Gantu to capture him. Gantu then develops an affection for the cute experiment, making 625 jealous. Lilo and Stitch rescue Mr. Stenchy as he begins to release the odor. Jumba puts Mr. Stenchy on a rocket and sends him to Pleakley's home planet where the odor is considered appealing.
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.
Halloween episode. Experiment 300 is discovered, which can morph into a person's worst fear. It is revealed that Mertle and her friends' worst fear is seeing Lilo without her head, and Lilo has fears of clowns and an abandoned house. Stitch's worst fear is water, and Nani's worst fear is hearing Cobra Bubbles say that he has to take away Lilo. Jumba's worst fear is his wife. Pleakley's worst fear is his mother.