When Arnold has a daydream while playing baseball, Harold tells him he has 24 hours left to live (th...

Not looking forward to performing in Helga's "The Four Food Groups" musical, Arnold and Gerald decid...

When Arnold accidentally ruins Eugene's new bike, he takes Eugene out on a day of fun, thinking that...

When Helga loses her pink book, full of love poems about Arnold on the bus, it ends up in Arnold's h...

The kids are really looking forward to their field trip to the aquarium - especially when they remem...

An obsessed Helga steals Arnold's hat to complete her shrine to Arnold, which is hidden in the back...

Arnold's hat lands on the stoop of "Stoop Kid," - a bully who has lived his whole life on his stoop,...

Helga is annoyed when Rhonda doesn't invite her to her slumber party - everybody assumes that "girly...

Arnold is asked by his Grandma to help save an old building, and then asked by Ernie to help knock t...

Two girls from the sixth grade who are tired of the way that their boyfriends treat them, decide to...

Arnold's favorite baseball player is playing his last game, so he decides to go and see his last gam...

Arnold has a really bad day - the city is suffering from a heatwave, and whatever he does, Arnold ju...

Snow hits the city and Arnold can't wait to get out and have some fun... but wait, there's chores to...

At the Annual Cheese Fair, Helga tries her best to keep Arnold well away from Ruth - a girl who Arno...

Arnold and friends decide to clear out a vacant lot to play baseball on, but the adults take over it...

Arnold attempts to do something that no other kid has done before - completing the entire list of a...

When the kids complain of being bored, Grandpa tells the story of the Haunted Train. So, the kids de...

When Arnold gets mugged in the street, Grandma teaches him how to defend himself, but the training a...

Grandpa, Arnold, and Gerald are all going on an old fashioned camping trip... until Big Bob, Helga,...

All of the boarders get very curious to what is inside the very personal Mr. Smith's package.

Oskar gets kicked out of Suzie's room when they get into an argument, so Arnold tries to get them ba...

While Helga tries to find the perfect gift for Arnold, Arnold tries to find Mr Hyunh's long-lost dau...

Arnold has trouble with the basketball coach and his favored son.

An older cool guy befriends Arnold, but Arnold realizes that he is really a shoplifter.

Arnold and the gang have no choice but to take the subway home after dark.

Arnold and the gang set out on a quest to find the hidden treasure of the mysterious "Wheezin' Ed" o...

Arnold is given the assignment to tutor Torvald, the meanest, toughest kid in Arnold's math class, f...

Gerald goes to Arnold's place to meet the other residents.

Arnold and Helga compete on a Spelling Bee contest.

When Arnold's pigeon gets sick, he takes it to "Pigeon Man", a person surrounded by pigeons who live...

Helga decides to give her talented sister Olga a taste of reality by changing her grade in her repor...

Arnold and Gerald must turn off all the lights in the city if they want to see Sally's Comet.

Arnold must find a way to recover his pig pet Abner after he runs away.

Arnold loses Grandpa's watch inside the sewers, so he must retrieve from The Sewer King.

Eugene is accused of pulling the fire alarm. In the school court, the jury thinks Eugene is guilty e...

The kids try to get in the book of world records so much that they would do anything, including most...

Arnold has a magic show and he makes a disappearing act and uses Helga as the person disappearing. H...

Arnold hits Harold with a baseball, so Harold promises Arnold that he'll beat him the next day.

On Valentine's Day, Arnold manages to arrange two dates; one with Ruth, the sixth grader he likes, a...

Arnold and the gang must stop Big Bob from chopping down the oldest tree in town.

When the kids make their new teacher, Mr. Simmons, quit his job, the replacement makes them realize...

Helga drinks a potion to lose all feelings for Arnold.

Gerald's secret is revealed; he doesn't know how to ride a bike, so Arnold teaches him how.

Arnold and Gerald compete against Helga for the school newspaper.

When Harold is walking in the street, he finds a kitty that belongs to an old lady and he takes it,...

Schoolyard tradition has it that on the first Monday of June each year, the fifth graders throw the...

After Arnold accidentally kills Eugene's fish with a yo-yo, he must do something to make up for it.

An organ grinder's monkey kisses Helga, who's convinced she has caught 'monkeynucleosis'.

Arnold and Gerald do a spot of fishing, determined to catch the pond's biggest fish, the legendary "...

Gerald and Arnold get on the case when Timberly loses her Barney-esque doll.

The new girl is teased at school by Helga and the other girls, but she's soon accepted by everyone.

Arnold and Gerald send the neighborhood alien crazy as they broadcast a mock Halloween radio show.

After Arnold saves Sid from an injury, Sid devotes himself to paying Arnold back with unending kindn...

Arnold and Gerald bunk off school, but their day is ruined by their fear of being found out.

Arnold and Gerald go around the city following "Porkpie", a mysterious man caught on film. They susp...

In this variation of "The Tell-Tale Heart", Phoebe plagiarizes from a poetry book and uses one of th...

Wolfgang and his gang of fifth graders challenge Arnold and his friends to a football game, but he h...

Gerald, getting tired of his family bugging him, moves out of his home and into Arnold's boarding ho...

Gerald becomes an entrepreneur out of selling watches until the market becomes saturated.

Rhonda and Nadine fall out over working on a project at school, leaving Arnold to work with both of...

Arnold's Grandpa enters a Chinese Checkers tournament to reclaim his pride lost forty years ago. Rob...

Helga's mother tries to let her and her father, Bob, bond.

Arnold follows in his Grandpa's footsteps and competes in the annual block party eating contest. Aft...

Rhonda gets glasses and finds out what it is like to be a "Geek".

Helga uses Stinky as her boyfriend to try to make Arnold jealous.

Arnold develops a crush on Miss Felter, a substitute teacher, thinking he is having dinner at her ho...

Phoebe becomes hall monitor and asks Helga for tips. She becomes overwhelmed by the "power" and soon...

Harold runs away from his Bar Mitzvah, thinking he will retain his childhood this way.

Arnold and his friends get Coach Wittenberg to be their new bowling coach.

The ghost of a former boarding house resident is believed to have been causing strange occurrences i...

After finding out that his idol is a haughty, primped actor, Eugene sets out to become bad.

Helga and Arnold fall asleep and have their own "parody/dream" of the opera Carmen.

Arnold and a descendant of his grandpa's arch enemy, Rex Smythe-Higgins, compete in a boat race.

Teachers of Arnold's school go on strike because of inadequate funding; He and his friends are on cl...

After creating an idea for a parade float, Arnold is confident of it showing up in a parade.

A lounge singer moves into the Sunset Arms after renouncing his songwriter, who also moves there.

While feeling the effects of laughing gas, Helga leaves a confessional message of love on Arnold's p...

As punishment for shoplifting a ham, Harold is forced to work for Mr. Green at his butcher shop for...

Arnold becomes a hot (and dangerous) hitter. He keeps injuring people everytime he swings the bat. A...

Mr. Hyunh has a talent for country singing, so Arnold and Gerald, after recording a CD with him at t...

Grandpa becomes tired of dealing with the boarding house and decides to sell. Arnold has to convince...

Gerald's voice is deepened after having his tonsils out, just a few days before the school recital.

Sid pretends that Arnold's room is his, since he's ashamed of showing his real room to Lorenzo.

Patty challenges Helga to a fight after Helga gets on her last nerves by picking on her once too man...

Stinky's simple life changes after he becomes the surprise new spokesman for Ya-Hoo Soda.

Olga gets engaged to a con man who does not exactly woo Helga as he did the rest of her family, but...

Curly gets enraged after a minor playground mix up. He locks himself in the principal's office and r...

Phoebe wins a chance to meet her favorite singer, only to find out that he doesn't write or sing his...

Grandpa thinks he's going to die soon because no one in his family ever made it past his age. He pre...

When Bob has to go to a business meeting, Miriam and Helga are forced to go on the family road trip...

Principal Wartz gives Sid a detention believeing he placed fake vomit so he could trip over, even th...

A roller coaster breaks down while Eugene and Arnold are at the top of its tallest drop.

After the results of an aptitude test are announced, Harold gains self-confidence and Helga feels du...

Oskar gets a job as a newspaper carrier but uses Arnold as cover for his laziness.

Arnold finds out Iggy wears bunny pajamas with feet in them, and Arnold accidentially spills the bea...

Bob hires a nanny to help Miriam around the house, much to Helga's dismay. From this moment on, Helg...

A. All the kids are paired with adults with interesting jobs except Arnold, who is forced to spend t...

Harold is invited to Rhonda's party and befriends the female bully, Big Patty.

The Coach wants to remarry Tish and asks Arnold to be his best man. Along the way, Arnold teaches th...

Rhonda holds a cool-people-only party at her house. In retaliation, Arnold and his friends hold a "g...

Helga, lost in a love reverie, writes 'Arnold loves Helga' on a wall, but changes the name to 'Lila'...

The kids compete in a grand prix race against each other.

Arnold and Helga both think they are having the worst Thanksgivings ever. Arnold's Family are celebr...

Helga tells jokes about her classmates, who take offense to it.

The town is flooded and Arnold's class is trapped in the school.

P.S. 118 is holding a Spelling Bee, and Helga wants to win one trophy to get out of Olga's shadow, b...

Arnold, Grandpa, and friends reenact the Pig War.

Arnold is okay with working with Gerald at Mrs. Vitello's flower shop after she's injured and puts G...

As a science assignment, Arnold and Helga have to work together, and get along with each other, for...

Arnold has to do a book report, and he decides to do it on his favorite author, Agitha Cawfield, but...

Lorenzo, a neurotic rich kid, comes to P.S. 118. All the kids try to help him become an average kid.

Arnold snaps at school after Helga tries his patience once too often.

Arnold is in charge of the school dance. He books has-been singer Dino Spumoni, and when he sings a...

The school is doing the play "Romeo and Juliet". Arnold lands the role as Romeo so Helga will do any...

Harold, Sid, and Stinky all moon Principal Wartz, but Arnold is blamed, even though he was just an i...

Helga's sister Olga comes home for spring break and becomes a classroom aid in Helga's class, much t...

After Sid works off a debt with loan shark Big Gino, the two become friends, but when Sid is told to...

Gerald's older brother Jamie O has a sudden burst of kindness when he finds a girlfriend, but Arnold...

After losing Eugene's birthday party invitations, Arnold feels obliged to throw him another party, b...

Stinky grows a huge pumpkin to enter in a city competition.

After Bob pops his spine, Miriam runs Big Bob's Beepers. She gets in over her head and forgets about...

Arnold finds out that Oskar is illiterate and tries to teach him to read.

Helga wants to show Arnold that she can be as sophisticated as Lila is by taking him, Gerald, and Ph...

Phoebe is promoted to the sixth grade, but realizes that her new so-called "friends" are just using...

A sleep-talking Helga confides into Bob's parrot about her love for Arnold. The next day, the parrot...

Crisis strikes when Gerald's little sister, Timberly, eats a stock of chocolate turtles that he and...

Helga tries to separate Arnold from Lila while at the annual Cheese Fair.

Harold, after discovering his friends think he is obese, decides to go on a weight-loss cruise. When...

After Grandpa tells Arnold that he never got his grade school diploma, Arnold convinces him to come...

Arnold and Helga must care for an egg for a school project about parenting. Meanwhile, Rhonda and Ha...

Helga becomes a model, but she quits after she gets irritated at everyone dressing like her.

Arnold's classmates are tired of constantly telling them the right thing to do, so he stops giving t...

After getting in a car accident, Bob and Grandpa face off on the golf green, with the loser having t...

Rhonda attends a finishing school, but is far from impressive with her stroppy attitude, and seeks h...

Arnold's bland country cousin, Arnie, comes to visit. Arnold begins to notice that Arnie and Lila sh...

Oskar has to take care of his infant cousin-in-law (also named Oskar), while both Susie and her cous...

Phil's twin sister comes for a visit, bringing along an unsettled conflict between them.

Arnold and the gang are part of a synchronized swimming team led by Coach Wittenburg.

After eating pork rinds, Helga sleepwalks, uttering her secret about Arnold as she does so.

Arnold, Grandpa, Grandma, Ernie, and Mr. Hyunh compete on a game show against a "perfect" family fro...

Arnold tells an urban legend about a decapitated taxi driver. The gang goes out, only to find the de...

Arnold and Gerald try to prove superstitions are fictitious, only for it all to backfire on them.

Arnold's Grandpa recalls his adventures as a soldier in the Second World War, outwitting a regiment...

Helga confides in the school psychiatrist about her social life, family life, and her love for Arnol...

Dino Spumoni is found missing and then declared dead after what appears to be a suicide attempt. but...

When Arnold gives the superhero Monkeyman a taste of normal life, he's far too busy to bother helpin...

Helga and Harold must return to town on their own after the bus leaves them behind after a school tr...

Helga decides to act like Lila so Arnold will like her..

Mr. Green runs for city council.

Sid thinks Stinky is a vampire.

Olga gets into a "Big Sis" program, but her "Lil' Sis" is Lila.

Arnold, Sid and Gerald find a bag filled with money, but when Arnold loses it, everyone thinks he st...

When Mr. Simmons is upset that Principal Wartz is being too strict with the students, Wartz decides...

The kids must face two bullies when a new kid, Ludwig, returns and wants the vacant lot for himself.

When Phoebe breaks a leg after being hit by a truck, Helga believes it's her fault (and it is), so s...

Helga inscribes her name in her Arnold locket.

Sid becomes obsessed with cleanliness.

Harold is suspended and will do anything to get back into school.

Ernie starts dating a tall model, but she doesn't want to continue dating him because of his height.

Arnold asks Grandpa what really happened with his parents, and he finds out that they disappeared af...

When Arnold, the boarders and the Patakis go to the beach, a girl uses Arnold to win a sandcastle co...

Arnold gets stuck in a tree with Harold and Eugene.

Rhonda's family goes broke and they move into the boarding house.

Helga gets amnesia, and Arnold starts acting nice to her.

Grandpa Phil and his old friend have been feuding for quite some time, as their friendship fell apar...

Arnold visits his cousin Arnie, whose friends look remarkably familiar to Anrold's

Chocolate Boy wants to give up chocolate.

P.S. 118 is having an Arm Wrestling contest, but Harold get humiliated when he loses to Patty before...

After Arnold saves the life of a rich man, the man invites Arnold and Grandpa Phil to his house. He...

Arnold is sick and tired of everybody preforming their April Fool jokes on him (escpecially Helga),...

Gerald is involved with his new favorite game which Arnold dislikes.

Arnold, Gerald, Harold, Sid and Eugene go on a fishing trip with their fathers and Phil.

Rhonda uses a folding paper fortune teller to see who will marry who, and Arnold and Helga get paire...

Stinky, Harold, and Sid are on the run after they think they blew up a police station.

Mr. Hyunh has Arnold pretending to be his son for his new employer.

Mr. Hyunh, Oskar, and Ernie purchase a race horse, or so they think.

Curly gets Rhonda to act like his girlfriend after something happens to Rhonda's mother's fur coat a...

Arnold finds a journal describing the adventures of his parents in the Jungle. Also, it contains a m...

Arnold finds a journal describing the adventures of his parents in the Jungle. Also, it contains a m...

Arnold does something for Timberly, causing Timberly to have a crush on Arnold. She makes Lila start...

Eugene gets the lead role in the school musical "Eugene, Eugene". But the play director cuts the par...

Gerald's Ghost Bride story inspires the other boys to venture into the cemetery at night, but they m...

Gerald gets jealous because he thinks Jamie O. is trying to steal the girl he likes, when, actually,...

After Mr. Simmons wins an award, a TV station does a documentary on how he teaches.

After Big Bob has a heart attack, he tries to become nicer.

Phoebe gets embarrassed after she "passes gas" in front of a microphone.

Grandpa's Packard is stolen from an antique car show.