This episode opens with a baseball game and Ataru getting hit with a left field flyball. Ataru is soon escorted home and discovers he's been chosen to fight an invading alien force's champion in a 10-day game of tag. If he loses, the aliens will invade. But if he wins, the aliens will go home. Ataru isn't at all willing to play tag until he sees the alien's champion: the beautiful Lum.

This episode opens with Ataru friends Megane and Lum's Stormtroopers at school who are watching films of the tag game. In this episode, a space taxi gives Ataru a ride home by accident and the fee is...too much. Since Ataru cannot pay, the space Taxi Collection Agency starts stealing all the oil in the world.

This is the first episode with Jariten, Lum's cousin. Jariten arrives in a giant peach and he and Ataru are enemies at once.

This episode opens with Lum putting on makeup to go meet Darling at school. A swallow swallows some food Jariten gives it and it grows such that it looks like a penguin. It's appearance in school is just the start of a full day of panic.

This show features the first appearance of Rei, Lum's former fiance. This episode opens with Ataru in his room watching a storm, and Lum trying to coax him to bed. Shinobu meets Rei and brings him to Ataru's house. After a lot of arguing, Rei challenges Ataru to a duel for Lum.

Ataru, Megane, and friends are going to a Gyudon restaurant for lunch and are quite shocked to see Rei munching down food like a black hole. During the rest of the episode, Rei is chasing Lum, Ataru and friends and as the chase goes on, the chaos grows on.

First episode with Kintaro, the vicious little boy with the pet flying bear and the red haired alien nanny. Lum and Jariten meet Kintaro inside a wind carp, and Kintaro tells them he's was looking for his nanny in the carp. Ataru, Shinobu, Lum, and Jariten try to help Kintaro find his nanny by asking around.

Kintaro's nanny, with Ataru's help takes the alien children on a tour of Earth and a Earth child's school. Ataru tells the myth of the real Kintaro who grew up in the wild and slew a demon. So Kintaro decide to live up to his name.

First appearance of Sakura, The Shinto maiden. Ataru can no longer endure Lum, so he has gone undercover. Unfortunately, at a restaurant, the appearance of Lum, Ataru parents, Shinobu, and Cherry blows his cover; and a mob chases after him. He manages to duck them and bumps into Sakura, who takes him home for exorcising.

Arriving at school one morning, Ataru is greeted by all boys in the school who are waiting for the new nurse, Sakura, arriving at school today. Ataru appears to be sick, but in reality he is possessed; and Sakura performs the exorcism.

Ataru is phoning Shinobu in order to make plans for a date, when Lum interrupts and get's Shinobu mad at Ataru. Ataru throws Lum out and spends the rest of the episode trying to contact Shinobu. But Lum is persistent and uses a ray to jam the phone lines. But this ray also has the side affect of making a plane and a helicopter vanish.

Walking home from school, Ataru is assaulted by a group of black cats and gets a nasty bump on the head. At midnight, he is using two mirrors to look at the bump, when a little demon pops out of the mirror. The demon proves to be too much for Ataru and Mr. Moroboshi, so they get Cherry to exorcise it.

Cherry gives Ataru some yellow ribbons which when tied to her horns, negate Lum's powers. In order to coax Lum into wearing them, Ataru has to put on a big charade of really loving her.

After an odd loss of control of his body after dinner, Ataru finds out Lum has some clay for making voodoo dolls. Ataru takes full advantage of the situation until Lum make a doll of Shinobu, and Ataru tries to get it away from Lum.

First appearance of Oyuki, Lum friend and queen of Neptune. Oyuki also has incredible ice powers. Megane and friends visit while Shinobu is nursing Ataru, who has a cold; and they discover a gate to Neptune in Ataru closet. By accident, they go through this gate and arrive on Neptune to be greeted by Lum and Oyuki.

While Ataru is flying an ultra-light, with Lum and Jariten tagging along, Kintaro crashes into him. With the help of Lum's electric shock, the crash send them all back in time to the dinosaur age.

First episode with Kurama, the karas-tengu princess. On a field trip, Ataru and friends accidentally meet a karas-tengu who takes Ataru to marry Kurama. Kurama then tries to reform Ataru to be her perfect husband.

Kurama uses a weird dimensional door to try and cure Ataru of his lechery. Inside the door, Ataru faces hostile versions of the girls he loves.

Megane and Lum's Stormtroopers set up a plot to embarrass Ataru and get Lum to leave him at the same time. They set up a date who will make a fool of Ataru, but Lum finds out and twists things around.

Megane and Lum's Stormtroopers set up a plot to embarrass Ataru and get Lum to leave him at the same time. They set up a date who will make a fool of Ataru, but Lum finds out and twists things around.

First appearance of Mendo, the rich noble; but it is not until episode 27 that he really does anything. Mendo tells a tale about ancient Japan featuring the normal cast in a slightly different alien invasion story. The aliens this time, all look like a bunch odd barbarians, except for a pretty girl and her young boy cousin.

First appearance of Mendo, the rich noble; but it is not until episode 27 that he really does anything. Mendo tells a tale about ancient Japan featuring the normal cast in a slightly different alien invasion story. The aliens this time, all look like a bunch odd barbarians, except for a pretty girl and her young boy cousin.

First appearance of Tsubame, Sakura's boy friend who has some magic abilities. Sakura invites Ataru, Lum, Shinobu, Megane, Perm, Chibi, and Kakugari to a disco. Things later go haywire as Tsubame starts casting spells and all sorts of weird creatures appear, including Rei.

Kurama takes Ataru back in time to help her father who appears to be afraid of women. Later Ataru and Kurama's father have to get past a guard on a bridge.

Ataru, Lum, Shinobu, Sakura, Megane, Cherry, and others are staying at a beachside resort. During the day, an octopus is stealing peoples swimsuits, but it appears to look like Cherry is doing it. At the end, they find the octopus and beat him up.

Still at the resort, the group meets some maniac who is having an all-you-can-eat contest. Sakura reveals the secret of her figure to be a diet pill called "Beauty Foods". But we really know the real reason is Sakura can just plain eat like a whale, and we see her do so as she beats Ataru and Cherry in the contest and clean the maniac of all his food.

Mendo returns for a formal introduction on his first day at school. He and Ataru have a duel for presidency of the class which ends in a tie. So they have a duel with cannons, which Ataru wins with help from Lum.

Lum's computer tells her that Mendo is really the best choice for her lover, so she brings a set of constellation scales to school and weight Ataru versus Mendo in a series of test in the scales. At the end, the scales break and we see the class as constellations.

First appearance of Benten, Lum's best friend the goddess. Lum takes Ataru to another planet to help in a battle against Benten's family. The battle consists of catching stones in bowls on a giant set of scales. Ataru starts playing with Benten and ends up messing up the entire game.

Match Benten and her girl biker friends come to Earth for another round of fun. Ataru sides up with Benten again, and Lum recruits Jariten and some people dressed as demons.

Ataru and Kuribayashi are enemies from the very start. Then Lum shows up and Kuribayashi falls in love. Finally Lum goes out with Kuribayashi in hopes on lightening his spirits.

On a day when students mothers come to school, Mrs. Mendo and Lum's mother get into a dispute and Mrs. Moroboshi acts as judge by setting up a roulette game.

Mendo bring an antique camera to school that sends Ataru off into other worlds. Lum manages to find him through a class room window that had been stuck for years.

Every morning, Ataru goes jogging early to see girls. On the way to school, Ataru breaks the fall of an attempted suicide as he was grabbing for a 100-yen coin below her. Ataru and Mendo get into a dispute over who is more noble and end up playing a game of tennis.

First appearance of Ran, Lum's childhood friend. During a small celebration at the Moroboshi house, a little doll enchants Ataru to follow it to Ran. Ran tries to kiss Ataru to drain his youth, but Lum shows up.

Ran invites Lum, Ataru, and Ten over for cookies and tea, but her real plot is to suck Ataru's youth. Ran makes a double of Ataru and tries switching them, but she gets confused and loses the real Ataru.

Lum acquire's Ataru's diary that has written in events that will happen throughout the day. Ataru tries to use it to his advantage, but the records in the diary are not quite how they first read; making use of puns or ambiguous statements.

Mendo finds an alien child in his locker and goes through great lengths to hide it from everyone. Later after everyone has found out, a whole mob of these alien children arrive, just for Mendo.

During math class, Kuribayashi and all the students fall asleep, save for Ataru and Mendo. Lum arrives and finds out that a tiny old man and girl are responsible for this magic. The tiny girl then uses some more magic to have a party with Lum, Ataru, and Mendo; until the principal arrives with some parents.

Lum, Mendo, Shinobu, Ran, Ten, Sakura, and Cherry all are in a blossom orchard for some traditional reason. Ataru is in the blossom orchard for a picnic. Cherry's chanting summons some sort of woman spirit, whom Ataru runs off and meets with a giant.

Ataru eats a lollipop Lum gave him and gets a mouth burn. Running off, he finds Cherry and a weird melon, which Ataru eats to cool his mouth. The melon causes Ataru to split into two Ataru's, one polite and the other casual. The two continue to fight all day.

Sleeping in class, Ataru has weird dreams which he relates a little of as he occasionally talks in his sleep. Annoyed, his classmates wake him and a dream demon comes out from Ataru's sleep.

Lum returns to her home planet unaware that her father is throwing her a matchmaking party. Ataru (who knows about the party) and Ten follow her.

Lum returns to her home planet unaware that her father is throwing her a matchmaking party. Ataru (who knows about the party) and Ten follow her.

On a class field trip, Ataru journeys to an underwater kingdom; and Ataru, Lum, Shinobu and Mendou get lost in a cave (exposing Mendou's legendary fear of the dark).

On a class field trip, Ataru journeys to an underwater kingdom; and Ataru, Lum, Shinobu and Mendou get lost in a cave (exposing Mendou's legendary fear of the dark).

Ataru and Ten switch bodies after wearing some kind of special earmuffs.

Ataru becomes the owner of a white caterpillar that Lum's Stormtroopers gave him as it eats a lot more than ordinary caterpillars.

Ten has an unrequited crush on Sakura.

Dracula wants to suck the blood of a beautiful young girl and his target is Lum.

Lum travels back in time in order to meet a younger Ataru and cure his libido.

Ataru and Ten compete for the attention of the pretty female proprietor of a flower shop.

The gang meet Tsuyuko, a girl who seems to bring rain wherever she goes.

Ten's horn falls off during a fight with Ataru, leaving him weak and unable to breathe fire. Ataru wastes no time in taking advantage of the situation.

Chaos ensues at the library after the characters in the books start coming to life. Wendy Darling (from J.M. Barrie's Peter Pan novel) enlists Ataru and Lum's help in restoring order.

Mr. Hanawa found employment in Ataru's school and at the same time, Lum gets enlisted into it.

A goblin who is living in Mendo's private pool has been shooed out and is trying to find a new home.

Remembering how Lum always got her in trouble when they were younger, Ran devises a new scheme to suck away Ataru's youth.

Rei appears and causes an uproar by eating everyone's lunch, and Ran tries her best to win him back.

On a cool evening disco dance held by the students at Tomobiki High School during summer break, a mysterious man comes to stalk the girls.

Things go wrong when Lum tries to make copies of Ataru in order to protect him from Ran's vengeance.

Lum and Ataru go on their first date together after Lum watches a television program that makes her realize her relationship with Ataru is abnormal. Ataru, although hesitant at first, shows that he does actually have feelings for Lum, but feels uncomfortable expressing them.

Lum, Ataru, Shinobu and Mendo spend their summer vacation at the seaside. First they provoke the wrath of a watermelon god, then they are visited by a crying yōkai.

A typhoon strikes Tomobiki and floods the Moroboshi household, but Lum has some inventive ways of helping her Darling and his parents cope with the flood waters.

Lum and Ten get drunk from eating umeboshi, and Lum begins flying around terrorizing Ataru's classmates in order to get more umeboshi.

During one of the cats' mating season, Ataru, Lum and Ten meet a beautiful female cat-like humanoid.

Lum's Stormtroopers throw Lum a party, but Ataru spoils it by yelling at Lum and accusing her of ruining his life. Lum leaves for her home planet, and when she doesn't return, Ataru, believing she has gone for good, begins to miss her and tearfully wishes she would return. However, it turns out Lum merely left to renew her passport.

Lum's friends from outer space plan a surprise class-reunion party for her, but an unaware Lum can't understand why her friends are avoiding her and is hurt.

Lum, Ataru, Shinobu and the rest of the Tomobiki student body - except for Mendo and his small gang of "good kids" - fight a new school rule which forbids students to leave the campus to eat lunch at fast-food joints.

Ataru, Lum, Mendo, Shinobu, and Jariten all go on a picnic to a remote part of Japan which has some fossils. A group of archaeologists are also exploring this area and using a lot of fancy tricks to make the exploration seem more dramatic than it is.

Kurama has her subjects place her in suspended sleep again in the hopes that some prince may awaken her.

Ten has gotten cavities. However, these cavities can be cured by biting 10 people and spreading the cavities to others. To relieve himself, he pays Ataru's class a visit.

Mendo's manipulative and dangerous younger sister, Ryoko, is introduced.

Kotatsu-neko is introduced.

Ataru helps a wounded bird who transforms itself into a raccoon and moves in to repay the service to Ataru.

Ataru finds the perfect part-time job - a washing attendant at a bathhouse - which he excitedly anticipates as being an opportunity to ogle and grope naked women. However, it doesn't turn out the way he expected.

When Lum plans the class's end-of-year party, Ataru explains that New Year's is when you forget who you are. He's a bit worried she took it a bit literally...

The normal cast is again put into an ancient Japanese story with Ataru as a food thief with Onsen-Mark and Cherry as his occasional companions.

After he's pelted by snowballs by Ataru and his friends, an annoyed Ten plans revenge on Ataru during class after Onsen-Mark threatens the class should any of them make noise.

Lum's mother boots father out of the house, so he comes to stay with Lum.

Lum gets Ataru to go on a ski trip with her, but Mendo, Shinobu, and Lum's guards find out and tail along to cause static, Ataru enters a ski contest.

Ten becomes the new Ataru when he mistakenly gets another girl to marry him, but tries to escape so he could see other older women.

Ten orders two special balls called Love-Love Catchballs that supposedly show a person's future love, one for each gender. When Ataru finds the one for guys that show their future wives, things quickly get chaotic.

Ryoko plans a masquerade "party" (which is actually a tournament of sorts) to get closer to Ataru, but her brother Shutaro is dead-fast against this, hiring all of Ataru's rivals to fight him.

Lum catches a cold from her father, which soon spreads across the entire male student body at Tomobiki High.

After their beach shop is ruined by their fighting due to Ataru and co.'s interference, a father and his "son" Ryunosuke move into Tomobiki High and set up a shop in-school.

Ataru talks to Megane one day about handing over a "position", which Shinobu overhears, thinking that he's planning to give up on Lum. Not wanting to lose Mendou, she takes manners into her own hands..

Admiring Ran's feminine beauty, Ryunosuke goes out with her in an attempt to become more feminine, but everyone else except Ran (who doesn't know Ryunosuke's true gender and thinks she's going on a date with a guy) thinks this means she's interested in girls when she claims she has no interest in boys. Lum and Ataru decide to intervene with Ran and Ryunosuke's "date".

When Ataru flips out over Lum for forgetting his upcoming birthday, she goes absent from school for days and only comes home late at night. This causes both Ataru and Lum to become upset, as well as separately confine in Miss Sakura.

After enduring Lum's ultra-spicy dinner on a camping trip, Ataru, Mendou, Megane, and Perm head off to find food (with Lum and Ten not far behind). They eventually end up fighting against the Evil Peach after they're tipped off by Cherry of a village that produces giant peaches, wanting to save a beautiful girl from being sacrificed.

Ataru is changed into a girl by Kurama's tengu henchmen after they try to use a cannon to change Ryunosuke into a man for their princess. NOTE: There is no appearance of Shinobu in this episode.

After Ataru, Ten, and Mendo fall for a beautiful woman's love letters - which end up luring them (along with Lum and Shinobu) to the inn she works in - they stay at a creepy inn, where the residents quite literally want them for dinner.

Mendo's rival Tobimaro Mizunokoji returns, and the two decide to settle their baseball rivalry once and for all.

Shinobu gets involved with the rich Kobayakawa family's youngest son, the adopted Makoto, whose father recently died. But his older siblings want to bump him off so that they don't have to share their late father's wealth with him.

Ataru is the producer/director of a film for school. At first it only involves him, Lum, and the Stormtroopers, but it soon involves most of the student body after Ataru gets funding by Mendo.

Ataru and Lum are left home alone when his parents leave for three days, and Lum locks Ataru inside of his own house! When a botched-up meal causes planes and tanks to appear instead of food, it attracts the attention of Sakura and Sakuranbo, who try to fight them off..but end up fighting against each other's summoned creatures instead!

Onsen-Mark tells the class a story of a cursed willow tree, which Ataru finds a load of fluff and ends up releasing an old man after Mendou after he carved his company's symbol with a knife on said tree. The old man drops a map to a possible treasure, while Mendou plans to see him at midnight to settle a score regarding the mockery of his company logo Ataru carved on the back of his robe. Meanwhile, Onsen-Mark is forced to do guard duty across the school by himself at night.

Ataru, Lum, Shinobu, Mendo, Onsen-Mark, Sakura, Cherry, and the Stormtroopers have a stay at a mansion, where they are slowly picked off one by one in a manner similar to the nursery rhyme Cock Robin.

Ten's mother, a firefighter, comes to visit her son on Earth. Ten must keep his fire-breathing a secret from his mother as she hates pyromaniacs and will send all those who are to Hell. Unfortunately for him, Ataru - taking full advantage of Ten's mother's position - isn't going to make it easy on him.

When Ataru gets poisoned by one of Ran's cupcakes, Lum rushes into a magical world to find an antidote for him before he dies.

An accident at the mall causes Ataru's mother to become unconscious. During this time she begins to have nightmares.

Ryoko holds a "Summer Xmas" party, where everyone must come in male-female pairs. And the main attraction is a gigantic Christmas tree, which they must climb in order to get to the dance floor above. The male winner will receive a kiss from Ryoko, and the female Mendou.

Ataru, Lum, Mendo, and Shinobu stay at an inn and meet Otama, a scaredy-cat ghost who tries (and fails) to out-scare an old couple each year around the summer. But the old couple are far scarier than she is (though not on purpose).

Ryunosuke tries to recall what her mother was like, and her father doesn't help her at all in this endeavor. A new eyecatch featuring Lum and Ataru is introduced this episode.

Thanks to Ten's Core technology, he, Ataru, and Mendo make three Sakura sand dolls come to life. Frustrated, Lum goes out with another guy to make Ataru jealous.

Tired of being defeated recently by Ataru, Ten goes into training with the help of Cherry and Lum to defeat his arch-nemesis.

On holiday at Mendo's family's mountain lodge, Lum, Shinobu, Ataru and Mendou are attacked by crazed Tororo yam filling (torojiru).

Lum, Ran, Benten, and Oyuki find out that their old teacher, a giant, robot chalkboard eraser named CAO-2, has come to Earth after being trapped on a deserted planet for years. And the former three are not pleased with the news.

Ataru, Lum, Shinobu, Mendo, and Ryunosuke go back in time to when Mendou was an obnoxious, violent kid to cure him of both his nyctophobia and claustrophobia.

A batch of matsutake mushrooms from Cherry turn the Tomobiki High student body and staff alike (except Lum and Cherry himself) into a bunch of high weirdos desperate for entertainment.

After Ten burns Lum's scarf she made especially for Ataru, he's forced to do something he's never really done before - apologize. And Ataru is making sure to drag this out as much as possible, even convincing Lum to get angry at him.

Ataru's parents head away for an overnight trip to Atami, leaving Lum and Ataru in the house together. Ataru dreads the prospect of a Lum-cooked dinner, while a horrified Mendo and Lum's Stormtroopers storm the Moroboshi home to protect Lum from Ataru. Ataru tries to kiss her at the last moment, but as a precaution, puts an armor that prevents electricity, in the last frames...he begins to cry.

Onsen-Mark is given the task of making "a woman" out of Ryuunosuke.

A contest is held in Tomobiki for Miss Tomobiki, with a reward of 150,000 yen for the winner. Candidates include Lum, Shinobu, Ran, Sakura, and Ryunosuke.

Ataru has a literal out-of-body experience when he eats a strange potion shaped like a fish cookie from Cherry.

Mendo talks to Sakuranbo about Ataru's possible weaknesses in this clip show episode.

After saving its life three times from Ten's antics, a snowman spirit awards Ataru with a late night dinner, taking the form of a cute pink-haired girl that only he can see.

Cherry tells Ten a fairytale that's basically a giant mishmash of Japanese children's stories, featuring Ataru and Lum as an old couple and Ten as their "son".

Ryunosuke is blackmailed into going on a date with Shinobu to obtain a bra, which she's always wanted to wear.

A trio of middle-school space girls steal Benten's chain and then challenge her, Lum, and Oyuki to fight them.

Ran tries to clone Lum to get revenge on her, but it doesn't work quite as planned.

Megane deals with a tough, fast-eating "fast-food costumer dragon" named Ryuu at the noodle shop he works at, who criticizes others' inferior foods and eats for free if not satisfied. But soon other fast-food fighters start hitting the scene in Tomobiki, and Megane only worries even more. Turns out that Mendou, who's thinking of opening a supermarket in town in an attempt to bankrupt the small-time family restaurants, is the cause of this, starting a contest between Ataru and co. and the fast-food fighters to determine if Tomobiki gets the supermarket.

Ataru and Mendou get locked in the latter's giant safe, where they slowly go mad when the place starts flooding and they try to out-survive each other.

Ataru takes a bath at an old-fashioned sento (along with Cherry), where he tries to peek on the girls' side, where Lum, Shinobu, Sakura, Ran, Ryoko, Ryunosuke, Benten, and Oyuki are having a private party. But soon the Stormtroopers and even Mendo find out about Ataru's plan.

Sakura literally re-meets her childhood when Cherry slips her a pill that makes her childhood self appear, who wants to play. But everyone else thinks it's her illegitimate child.

In the series' second clip show, Ran gets video tapes "highlighting" her unhappy childhood, as well as previous episodes' events.

Ataru recounts how he met Sakura, and how she ended up as the school nurse of his school. This is intermixed with clips from previous episodes.

Episode 1 of a 2-episode serial. Ataru and Lum get into an argument, with Lum going to her UFO to sleep that night. But in her sleep it crashes on Mendou's property, with Lum losing her memory in the process. Mendou, disgusted by Ataru's lack of sympathy about Lum's missing, informs Ataru that she's on his property. He also tells him that if he wants her back, he'll have to go on his property and deal with him and his army. After some nudging by Lum's Stormtroopers, Ataru works together with them to save her.