1Salvem a árvore
Os meninos descobrem que Big Bob está planejando cortar a árvore mais antiga do bairro.
2Novo professor
A turma faz com que o Sr. Simmons deixe seu trabalho e recebem em troca um novo professor.
3Helga's Love Potion
Helga drinks a potion to lose all feelings for Arnold.
4Gerald's Secret
Gerald's secret is revealed; he doesn't know how to ride a bike, so Arnold teaches him how.
5The Big Scoop
Arnold and Gerald compete against Helga for the school newspaper.
6Harold's Kitty
When Harold is walking in the street, he finds a kitty that belongs to an old lady and he takes it, but then everybody appears, and Harold has to surrender the kitty to the old lady.
7Longest Monday
Schoolyard tradition has it that on the first Monday of June each year, the fifth graders throw the fourth graders into trash cans. So, Arnold and Gerald try to make a run for it. As more people are thrown into trash cans and the fifth graders know all the routes, Arnold and Gerald find out eluding the fifth graders is harder that they thought.
8Eugene's Pet
After Arnold accidentally kills Eugene's fish with a yo-yo, he must do something to make up for it.
9Monkey Business
An organ grinder's monkey kisses Helga, who's convinced she has caught 'monkeynucleosis'.
10Big Caesar
Arnold and Gerald do a spot of fishing, determined to catch the pond's biggest fish, the legendary "Big Caesar".
11Ransom
Gerald and Arnold get on the case when Timberly loses her Barney-esque doll.
12Ms. Perfect
The new girl is teased at school by Helga and the other girls, but she's soon accepted by everyone.
13Arnold's Halloween
Arnold and Gerald send the neighborhood alien crazy as they broadcast a mock Halloween radio show.
14Arnold Saves Sid
After Arnold saves Sid from an injury, Sid devotes himself to paying Arnold back with unending kindness.
15Hookey
Arnold and Gerald bunk off school, but their day is ruined by their fear of being found out.
16Freeze Frame
Arnold and Gerald go around the city following "Porkpie", a mysterious man caught on film. They suspect, because of the clues, that Porkpie are planning to kill "Marty", who turns out to be Mr. Green.
17Phoebe Cheats
In this variation of "The Tell-Tale Heart", Phoebe plagiarizes from a poetry book and uses one of the poems as her entry in a poetry contest. She wins, with her prize being a trophy resembling poet Emily Dickinson. Then, the trophy haunts Phoebe into confessing.
18Mud Bowl
Wolfgang and his gang of fifth graders challenge Arnold and his friends to a football game, but he has to first persuade them that his plays are good enough for them to win.
19Gerald Moves Out
Gerald, getting tired of his family bugging him, moves out of his home and into Arnold's boarding house, only to realize emancipation is not all it is cracked up to be.
20The High Life
Gerald becomes an entrepreneur out of selling watches until the market becomes saturated.
21Best Friends
Rhonda and Nadine fall out over working on a project at school, leaving Arnold to work with both of them separately.
22Steely Phil
Arnold's Grandpa enters a Chinese Checkers tournament to reclaim his pride lost forty years ago. Robby Fisher's name is a parody of Bobby Fischer.
23Quantity Time
Helga's mother tries to let her and her father, Bob, bond.
24Eating Contest
Arnold follows in his Grandpa's footsteps and competes in the annual block party eating contest. After much munching Old Football Head goes stomach to stomach with eating legend Seymour 'The Disposal'.
25Rhonda's Glasses
Rhonda gets glasses and finds out what it is like to be a "Geek".
26Helga's Boyfriend
Helga uses Stinky as her boyfriend to try to make Arnold jealous.
27Crush on Teacher
Arnold develops a crush on Miss Felter, a substitute teacher, thinking he is having dinner at her house.
28Hall Monitor
Phoebe becomes hall monitor and asks Helga for tips. She becomes overwhelmed by the "power" and soon everyone wants the old Phoebe back, even Helga once she realizes Phoebe's also giving her detentions.
29Harold's Bar Mitzvah
Harold runs away from his Bar Mitzvah, thinking he will retain his childhood this way.
30Coach Wittenberg
Arnold and his friends get Coach Wittenberg to be their new bowling coach.
31Four-Eyed Jack
The ghost of a former boarding house resident is believed to have been causing strange occurrences in there when Arnold and Gerald find an old pair of glasses believing to have belonged to him.
32Eugene Goes Bad
After finding out that his idol is a haughty, primped actor, Eugene sets out to become bad.
33What's Opera, Arnold?
Helga and Arnold fall asleep and have their own "parody/dream" of the opera Carmen.
34Tour de Pond
Arnold and a descendant of his grandpa's arch enemy, Rex Smythe-Higgins, compete in a boat race.
35Teachers' Strike
Teachers of Arnold's school go on strike because of inadequate funding; He and his friends are on cloud nine, only to find out that every lost school day will be taken from their summer vacation.
36Runaway Float
After creating an idea for a parade float, Arnold is confident of it showing up in a parade.
37Partners
A lounge singer moves into the Sunset Arms after renouncing his songwriter, who also moves there.