Seasons & episodes
S4 · E1Full Moon 1999-03-10 · 11 min
Harold, Sid, and Stinky all moon Principal Wartz, but Arnold is blamed, even though he was just an innocent bystander.
S4 · E2Student Teacher 1999-03-10 · 11 min
Helga's sister Olga comes home for spring break and becomes a classroom aid in Helga's class, much to Helga's chagrin.
S4 · E3Big Gino 1999-03-15 · 11 min
After Sid works off a debt with loan shark Big Gino, the two become friends, but when Sid is told to give Arnold a swirlie, he has to choose between the two.
S4 · E4Jamie O in Love 1999-03-15 · 11 min
Gerald's older brother Jamie O has a sudden burst of kindness when he finds a girlfriend, but Arnold and Gerald soon find out that the girl is just using Jamie O.
S4 · E5Eugene's Birthday 1999-03-17 · 11 min
After losing Eugene's birthday party invitations, Arnold feels obliged to throw him another party, but it doesn't work out.
S4 · E6Stinky's Pumpkin 1999-03-17 · 11 min
Stinky grows a huge pumpkin to enter in a city competition.
S4 · E7The Beeper Queen 1999-03-29 · 11 min
After Bob pops his spine, Miriam runs Big Bob's Beepers. She gets in over her head and forgets about her family.
S4 · E8Oskar Can't Read? 1999-03-29 · 11 min
Arnold finds out that Oskar is illiterate and tries to teach him to read.
S4 · E9Dinner for Four 1999-03-31 · 11 min
Helga wants to show Arnold that she can be as sophisticated as Lila is by taking him, Gerald, and Phoebe out to dinner with a coupon she won. She devises a plan to get out of paying when she discovers they're at the wrong restaurant.
S4 · E10Phoebe Skips 1999-03-31 · 11 min
Phoebe is promoted to the sixth grade, but realizes that her new so-called "friends" are just using her to do their homework.
S4 · E11Helga's Parrot 1999-04-05 · 11 min
A sleep-talking Helga confides into Bob's parrot about her love for Arnold. The next day, the parrot flies into Arnold's window, and it is up to Helga to get it.
S4 · E12Chocolate Turtles 1999-04-05 · 11 min
Crisis strikes when Gerald's little sister, Timberly, eats a stock of chocolate turtles that he and Arnold are supposed to sell for a local scout organization.
S4 · E13Love and Cheese 1999-04-07 · 11 min
Helga tries to separate Arnold from Lila while at the annual Cheese Fair.
S4 · E14Weighing Harold 1999-04-07 · 11 min
Harold, after discovering his friends think he is obese, decides to go on a weight-loss cruise. When he comes back, though, he is noticeably larger.
S4 · E15Back to School 1999-09-11 · 11 min
After Grandpa tells Arnold that he never got his grade school diploma, Arnold convinces him to come to go back to school at P.S. 118.
S4 · E16Egg Story 1999-09-11 · 11 min
Arnold and Helga must care for an egg for a school project about parenting. Meanwhile, Rhonda and Harold are project partners and must also take care of an egg.
S4 · E17It Girl 1999-09-18 · 11 min
Helga becomes a model, but she quits after she gets irritated at everyone dressing like her.
S4 · E18Deconstructing Arnold 1999-09-18 · 11 min
Arnold's classmates are tired of constantly telling them the right thing to do, so he stops giving them advice. Nevertheless, when his classmates get into sticky situations, they are in desperate need of his advice.
S4 · E19Grudge Match 1999-09-25 · 11 min
After getting in a car accident, Bob and Grandpa face off on the golf green, with the loser having to pay for the damage to both cars.
S4 · E20Polishing Rhonda 1999-09-25 · 11 min
Rhonda attends a finishing school, but is far from impressive with her stroppy attitude, and seeks help from fellow student Big Patty.
S4 · E21Weird Cousin 1999-10-09 · 11 min
Arnold's bland country cousin, Arnie, comes to visit. Arnold begins to notice that Arnie and Lila show interest in each other, making him jealous.
S4 · E22Baby Oskar 1999-10-09 · 11 min
Oskar has to take care of his infant cousin-in-law (also named Oskar), while both Susie and her cousin are gone.
S4 · E23Grandpa's Sister 1999-10-16 · 11 min
Phil's twin sister comes for a visit, bringing along an unsettled conflict between them.
S4 · E24Synchronized Swimming 8.0 / 10 · 1 published rating 1999-10-16 · 11 min
Arnold and the gang are part of a synchronized swimming team led by Coach Wittenburg.