Season 2, Episode 37 Bio Square
First Aired: December 1, 1997
As part of a science project, Arnold and Gerald prepare to spend 24 hours in a greenhouse—until Helga foils their plans.
Cast & Details See all »
- Premiered: October 7, 1996
- Rating: TV-Y7
- Premise: An animated look at city life through the eyes of 9-year-old Arnold, who has a football-shaped head and lives in a racially diverse neighborhood in a boardinghouse with his grandparents. (more)