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Hey Arnold!
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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

# First segment Second segment Original air date (United States)
61 Eugene's Birthday Stinky's Pumpkin March 17, 1999
62 Dinner for Four Phoebe Skips March 31, 1999
63 Full Moon Student Teacher March 10, 1999
64 Big Gino Jamie O. in Love March 15, 1999
65 The Beeper Queen Oskar Can't Read? March 29, 1999
66 Headless Cabbie Friday the 13th October 30, 1999
67 Helga's Parrot Chocolate Turtles April 5, 1999
68 Love and Cheese Weighing Harold April 7, 1999
69 It Girl Deconstructing Arnold September 18, 1999
70 Grudge Match Polishing Rhonda September 25, 1999
71 Veterans Day November 6, 1999
72 Back to School Egg Story September 11, 1999
73 Weird Cousin Baby Oskar October 9, 1999
74 Helga Sleepwalks Fighting Families October 23, 1999
75 Monkeyman! Buses, Bikes and Subways March 4, 2000
76 Grandpa's Sister Synchronized Swimming October 16, 1999
77 Helga's Masquerade Mr. Green Runs March 11, 2000
78 Helga on the Couch December 4, 1999
79 Dino Checks Out December 11, 1999
80 Summer Love June 21, 2000

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 aslo switch to digital paint in the same year, with Rugrats and SpongeBob SquarePants also doing so the following year.)
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