42 episodesFirst aired 4 March 2001
E1Mar 200111m
When Arnold gives the superhero Monkeyman a taste of normal life, he's far too busy to bother helping the weak and downtrodden.
E2Mar 200111m
Helga and Harold must return to town on their own after the bus leaves them behind after a school trip to a chocolate factory, and Helga has tickets for a wrestling match and she can't be late.
E3Mar 200111m
Helga decides to act like Lila so Arnold will like her..
E4Mar 200111m
Mr. Green runs for city council.
E5Mar 200111m
Sid thinks Stinky is a vampire.
E6Mar 200111m
Olga gets into a "Big Sis" program, but her "Lil' Sis" is Lila.
E7Apr 200111m
Arnold, Sid and Gerald find a bag filled with money, but when Arnold loses it, everyone thinks he stole it.
E8Apr 200111m
When Mr. Simmons is upset that Principal Wartz is being too strict with the students, Wartz decides to resign and he selects Mr. Simmons to take his place. The newly promoted Principal Simmons decides to make massive reforms to permit the school environment to be more liberal, though will the students at P.S. 118 appreciate his authority?
E9Apr 200111m
The kids must face two bullies when a new kid, Ludwig, returns and wants the vacant lot for himself.
E10Apr 200111m
When Phoebe breaks a leg after being hit by a truck, Helga believes it's her fault (and it is), so she starts being nice to Phoebe. Yet when Phoebe's leg heals, she decides to stay disabled for a little longer.
E11Apr 200011m
Helga inscribes her name in her Arnold locket.
E12Apr 200111m
Sid becomes obsessed with cleanliness.
E13Apr 200011m
Harold is suspended and will do anything to get back into school.
E14Apr 200111m
Ernie starts dating a tall model, but she doesn't want to continue dating him because of his height.
E15May 200124m
Arnold asks Grandpa what really happened with his parents, and he finds out that they disappeared after they left the country on a plane, although they might still be alive.
E16Jun 200124m
When Arnold, the boarders and the Patakis go to the beach, a girl uses Arnold to win a sandcastle competition. Ernie gets buried in the sand. Miriam and Suzie start taking dancing lessons. Grandpa thinks he's stuck on an island. Oscar starts using a metal detector to find ""treasure."" Big Bob gets a bad sunburn. Helga tries to warn Arnold that he's just being used.
E17Jan 200211m
Arnold gets stuck in a tree with Harold and Eugene.
E18Jan 200211m
Rhonda's family goes broke and they move into the boarding house.
E19Jan 200211m
Helga gets amnesia, and Arnold starts acting nice to her.
E20Jan 200211m
Grandpa Phil and his old friend have been feuding for quite some time, as their friendship fell apart years ago. However, they still attempt to compete with one another as they each believe they are the better individual; though when both men decide to enter the extremely dangerous Old Iron Man triathlon, Arnold attempts to put an end to their feud, as he does not believe they should risk their lives over something so trivial.
E21Jan 200211m
Arnold visits his cousin Arnie, whose friends look remarkably familiar to Anrold's
E22Jan 200211m
Chocolate Boy wants to give up chocolate.
E23Feb 200211m
P.S. 118 is having an Arm Wrestling contest, but Harold get humiliated when he loses to Patty before the contest, so he asks Patty for some pointers on winning.
E24Feb 200211m
After Arnold saves the life of a rich man, the man invites Arnold and Grandpa Phil to his house. He tells Arnold that he wishes Arnold was the son he never had, but he really does have a son, but they share nothing in common.
E25Apr 200223m
Arnold is sick and tired of everybody preforming their April Fool jokes on him (escpecially Helga), so he tries one of his own, but it backfires when it temporarily blinds Helga.
E26Apr 200211m
Gerald is involved with his new favorite game which Arnold dislikes.
E27Apr 200211m
Arnold, Gerald, Harold, Sid and Eugene go on a fishing trip with their fathers and Phil.
E28May 200222m
Rhonda uses a folding paper fortune teller to see who will marry who, and Arnold and Helga get paired up, causing them to both dream what life would be like married to each other.
E29Jun 200211m
Stinky, Harold, and Sid are on the run after they think they blew up a police station.
E30Jun 200211m
Mr. Hyunh has Arnold pretending to be his son for his new employer.
E31Oct 200211m
Mr. Hyunh, Oskar, and Ernie purchase a race horse, or so they think.
E32Oct 200211m
Curly gets Rhonda to act like his girlfriend after something happens to Rhonda's mother's fur coat and he fixes it.
E33Nov 200225m
Arnold finds a journal describing the adventures of his parents in the Jungle. Also, it contains a map telling where they had to go after they left him.
E34Nov 200223m
Arnold finds a journal describing the adventures of his parents in the Jungle. Also, it contains a map telling where they had to go after they left him.
E35Jan 200311m
Arnold does something for Timberly, causing Timberly to have a crush on Arnold. She makes Lila start to like Arnold because he has been helping Timberly.
E36Jan 200311m
Eugene gets the lead role in the school musical "Eugene, Eugene". But the play director cuts the parts that Eugene is a hero, and makes the parts look like he is a loser.
E37Nov 200311m
Gerald's Ghost Bride story inspires the other boys to venture into the cemetery at night, but they may have bit off more than they could chew, because they're hunted down by two different Ghost Brides.
E38Nov 200311m
Gerald gets jealous because he thinks Jamie O. is trying to steal the girl he likes, when, actually, the girl likes Jamie O.
E39Nov 200311m
After Mr. Simmons wins an award, a TV station does a documentary on how he teaches.
E40Nov 200311m
After Big Bob has a heart attack, he tries to become nicer.
E41Jun 200411m
Phoebe gets embarrassed after she "passes gas" in front of a microphone.
E42Jun 200411m
Grandpa's Packard is stolen from an antique car show.