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The fourth season of Hey Arnold! consists of 32 quarter-hour episodes and 4 half-hour specials.
During this season, the series switched over from using cel animation (the first four quarter-hour episodes were the last to use it) to digital ink and paint, Spencer Klein replaced Phillip Van Dyke as the voice of Arnold, and the opening theme was remixed.
Episodes[]
| # | Image | Title | Original air date (United States) |
|---|---|---|---|
| 61 | ![]() |
"Eugene's Birthday" | March 17, 1999 |
| When Eugene's birthday parties are a bust, he begins to think that Arnold is a jinx, and Arnold tries to prove him wrong by throwing a perfect birthday party. | |||
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"Stinky's Pumpkin" | March 17, 1999 | |
| Stinky doesn't believe he's good at anything, but when he enters a crop-growing contest, he ends up growing a pumpkin the size of a small building. | |||
| 62 | ![]() |
"Dinner for Four" | March 31, 1999 |
| After winning coupons to a fancy French restaurant, Helga attempts to prove to Arnold she's more sophisticated than Lila. | |||
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"Phoebe Skips" | March 31, 1999 | |
| Phoebe is promoted to the sixth grade, but is too late to realize that her new "friends" are just exploiting her for their own benefit. Meanwhile, Helga has difficulty replacing Phoebe as her sidekick. | |||
| 63 | ![]() |
"Full Moon" | March 10, 1999 |
| Harold, Stinky, and Sid moon Principal Wartz, but Arnold is blamed, even though he was just an innocent bystander. | |||
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"Student Teacher" | March 10, 1999 | |
| Helga's sister Olga comes home for spring break and becomes a classroom aid in Helga's class, much to Helga's chagrin. | |||
| 64 | ![]() |
"Big Gino" | March 15, 1999 |
| Sid does business with a loan shark. | |||
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"Jamie O in Love" | March 15, 1999 | |
| Jamie O falls in love with a pretty girl, only to realize he's being used. | |||
| 65 | ![]() |
"The Beeper Queen" | March 29, 1999 |
| Miriam is tasked with running Big Bob's Beepers after Big Bob injures himself before closing an important deal. | |||
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"Oskar Can't Read?" | March 29, 1999 | |
| Oskar is fed up with the troubles of being illiterate, and with Arnold's help, learns how to read. | |||
| 66 | ![]() |
"Headless Cabbie" | October 30, 1999 |
| Arnold tells an urban legend about a decapitated taxi driver. The gang goes out, only to find the details in the story are becoming real. | |||
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"Friday the 13th" | October 30, 1999 | |
| Wolfgang dares Arnold and the gang to break superstitions, which causes a spate of bad luck to erupt. | |||
| 67 | ![]() |
"Helga's Parrot" | April 5, 1999 |
| 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. | |||
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"Chocolate Turtles" | April 5, 1999 | |
| Gerald comes up with a plan to make money by selling Campfire Lass chocolate turtles so he can pay her back and get a new go kart, but his plan backfires when Timberly eats all of them before he can give them out to the customers. | |||
| 68 | ![]() |
"Love and Cheese" | April 7, 1999 |
| Arnold invites Lila to the Cheese Festival, and Helga tags along to make their night as bad as possible. | |||
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"Weighing Harold" | April 7, 1999 | |
| Harold, feeling upset because everyone makes fun of him for being fat, goes on a cruise to lose weight, only to find out that he gained more weight during the trip. | |||
| 69 | ![]() |
"It Girl" | September 18, 1999 |
| When fashion expert Johnny Stitches visits PS 118, he considers Helga, with her snarling attitude, to be the perfect new model. | |||
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"Deconstructing Arnold" | September 18, 1999 | |
| Arnold's classmates are tired of him constantly telling them the right thing to do, so he stops giving them advice. Nevertheless, when his classmates get into very bad and sticky situations, they are in desperate need of his advice. | |||
| 70 | ![]() |
"Grudge Match" | September 25, 1999 |
| After Grandpa Phil and Big Bob give each other fender benders on their cars, they try to settle who pays for the damages in a game of golf. But Grandpa gets golf confused with Tennis. Can Arnold teach him before the big game Sunday? | |||
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"Polishing Rhonda" | September 25, 1999 | |
| Rhonda attends a finishing school that is far from impressed with her self-centered attitude and seeks help from fellow student Big Patty. | |||
| 71 | ![]() |
"Veterans Day" | November 6, 1999 |
| Arnold'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. | |||
| 72 | ![]() |
"Back to School" | September 11, 1999 |
| After Arnold finds out that Grandpa never graduated grade school, Phil goes back to school to get his grade school diploma. Grandpa tells him a story about how he was a good student in school, but when The Great Depression came, he had to quit school and get a job to help his family. | |||
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"Egg Story" | September 11, 1999 | |
| Arnold and Helga are assigned in Mr. Simmons' class project to take care of an egg for a weekend. Helga tries to show her nice side, but Arnold, assuming that she's going to start picking on him, lays down the law before she gets a chance. | |||
| 73 | ![]() |
"Weird Cousin" | October 9, 1999 |
| Arnold's boring country cousin, Arnie, comes to visit. Lila immediately falls for him and they begin to spend time together, making Arnold angry. | |||
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"Baby Oskar" | October 9, 1999 | |
| Oskar, who can't even take care of himself, has to take care of his infant nephew, Baby Oskar, for a day. | |||
| 74 | ![]() |
"Helga Sleepwalks" | October 23, 1999 |
| After eating one too many pork rinds before bed, Helga sleepwalks, acting out her dreams of confessing her love to Arnold. | |||
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"Fighting Families" | October 23, 1999 | |
| Arnold is chosen to bring his family on a game show, but his family of boarders can't get along. | |||
| 75 | ![]() |
"Monkeyman!" | March 4, 2000 |
| When Arnold gives the superhero Monkeyman a taste of normal life, he's far too busy to bother helping the weak and downtrodden. | |||
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"Buses, Bikes, and Subways" | March 4, 2000 | |
| 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. | |||
| 76 | ![]() |
"Grandpa's Sister" | October 16, 1999 |
| Grandpa's sister Mitzi unexpectedly comes over to the Sunset Arms, and Grandpa isn't too happy about it. | |||
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"Synchronized Swimming" | October 16, 1999 | |
| Coach Wittenberg talks the boys into forming a synchronized swimming team, though they think it's for girls. | |||
| 77 | ![]() |
"Helga's Masquerade" | March 11, 2000 |
| Helga gets lessons on how to act like Lila in order to impress Arnold at Rhonda's party. All goes well, until Arnold accidentally calls her Lila. | |||
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"Mr. Green Runs" | March 11, 2000 | |
| Arnold helps Mr. Green run for the City Council. | |||
| 78 | ![]() |
"Helga on the Couch" | December 4, 1999 |
| When a psychologist comes to P.S. 118, she notices Helga's aggressive behavior, so she calls Helga for a session. Reluctantly, she goes and tells the psychologist about her family life and why she behaves this way. | |||
| 79 | ![]() |
"Dino Checks Out" | December 11, 1999 |
| Dino Spumoni fakes his own death to increase his record sales, but when someone else makes it big off of Dino's songs, he realizes that his life isn't over yet. | |||
| 80 | ![]() |
"Summer Love" | June 21, 2000 |
| When Arnold and Helga go to the beach for a week, Arnold meets a beautiful girl named Summer, but Arnold doesn't know that she's just using him so that she can win a sandcastle competition and the chance to appear on Babewatch. | |||
Trivia[]
- This season consists of 20 half-hours, but only 17 were actually aired in the US during its 1999 run. Episodes 75, 77 and 80 were held over for unknown reasons and aired as part of Season 5 in 2000.
- Due to the change from traditional cel animation to digital paint, characters now have darker outlines and crisper, brighter colors. (The Angry Beavers and CatDog would also switch to digital paint in the same year, with Rugrats and SpongeBob SquarePants also doing so the following year.)
External links[]
| Hey Arnold! | ||
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| Media | Hey Arnold! (Episodes (Seasons: 1 • 2 • 3 • 4 • 5) • Characters • Video releases) • Hey Arnold!: The Movie (Video game) • The Jungle Movie • Soundtrack | |




































