Season 4
31 episodes · Mar 10, 1999
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- S4E1
Full Moon
Mar 10, 199911mHarold, Sid, and Stinky all moon Principal Wartz, but Arnold is blamed, even though he was just an innocent bystander.
- S4E2
Student Teacher
Mar 10, 199911mHelga's sister Olga comes home for spring break and becomes a classroom aid in Helga's class, much to Helga's chagrin.
- S4E3
Big Gino
Mar 15, 199911mAfter 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.
- S4E4
Jamie O in Love
Mar 15, 199911mGerald'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.
- S4E5
Eugene's Birthday
Mar 17, 199911mAfter losing Eugene's birthday party invitations, Arnold feels obliged to throw him another party, but it doesn't work out.
- S4E6
Stinky's Pumpkin
Mar 17, 199911mStinky grows a huge pumpkin to enter in a city competition.
- S4E7
The Beeper Queen
Mar 29, 199911mAfter Bob pops his spine, Miriam runs Big Bob's Beepers. She gets in over her head and forgets about her family.
- S4E8
Oskar Can't Read?
Mar 29, 199911mArnold finds out that Oskar is illiterate and tries to teach him to read.
- S4E9
Dinner for Four
Mar 31, 199911mHelga 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.
- S4E10
Phoebe Skips
Mar 31, 199911mPhoebe is promoted to the sixth grade, but realizes that her new so-called "friends" are just using her to do their homework.
- S4E11
Helga's Parrot
Apr 5, 199911mA 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.
- S4E12
Chocolate Turtles
Apr 5, 199911mCrisis 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.
- S4E13
Love and Cheese
Apr 7, 199911mHelga tries to separate Arnold from Lila while at the annual Cheese Fair.
- S4E14
Weighing Harold
Apr 7, 199911mHarold, 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.
- S4E15
Back to School
Sep 11, 199911mAfter 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.
- S4E16
Egg Story
Sep 11, 199911mArnold 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.
- S4E17
It Girl
Sep 18, 199911mHelga becomes a model, but she quits after she gets irritated at everyone dressing like her.
- S4E18
Deconstructing Arnold
Sep 18, 199911mArnold'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.
- S4E19
Grudge Match
Sep 25, 199911mAfter 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.
- S4E20
Polishing Rhonda
Sep 25, 199911mRhonda attends a finishing school, but is far from impressive with her stroppy attitude, and seeks help from fellow student Big Patty.
- S4E21
Weird Cousin
Oct 9, 199911mArnold's bland country cousin, Arnie, comes to visit. Arnold begins to notice that Arnie and Lila show interest in each other, making him jealous.
- S4E22
Baby Oskar
Oct 9, 199911mOskar has to take care of his infant cousin-in-law (also named Oskar), while both Susie and her cousin are gone.
- S4E23
Grandpa's Sister
Oct 16, 199911mPhil's twin sister comes for a visit, bringing along an unsettled conflict between them.
- S4E24
Synchronized Swimming
Oct 16, 199911mArnold and the gang are part of a synchronized swimming team led by Coach Wittenburg.
- S4E25
Helga Sleepwalks
Oct 23, 199911mAfter eating pork rinds, Helga sleepwalks, uttering her secret about Arnold as she does so.
- S4E26
Fighting Families
Oct 23, 199911mArnold, Grandpa, Grandma, Ernie, and Mr. Hyunh compete on a game show against a "perfect" family from PS 119
- S4E27
Headless Cabbie
Oct 30, 199911mArnold tells an urban legend about a decapitated taxi driver. The gang goes out, only to find the details in the story are becoming real.
- S4E28
Friday the 13th
Oct 30, 199911mArnold and Gerald try to prove superstitions are fictitious, only for it all to backfire on them.
- S4E29
Veterans Day
Nov 6, 199923mArnold's Grandpa recalls his adventures as a soldier in the Second World War, outwitting a regiment of Nazis, while Gerald's dad, Martin, remembers his own time serving in Vietnam.
- S4E30
Helga on the Couch
Dec 4, 199923mHelga confides in the school psychiatrist about her social life, family life, and her love for Arnold.
- S4E31
Dino Checks Out
Dec 11, 199923mDino Spumoni is found missing and then declared dead after what appears to be a suicide attempt. but Arnold finds out that this isn't the case, and he secretly lives in the boarding house, believing that his work will skyrocket in value after his "death".