| Hey Arnold!|
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.
- 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.)
|Media||Hey Arnold! (Episodes (Seasons: 1 • 2 • 3 • 4 • 5) • Characters • Video releases) • Hey Arnold!: The Movie (Video game) • The Jungle Movie|