Biosquare
Show: Hey Arnold! --> Season: 3 - Season 3
AirDate: 12/7/1998
Runtime: 11
Voting: 8 (1)

Overview: As a science assignment, Arnold and Helga have to work together, and get along with each other, for 24 hours in the Sunset Arms greenhouse.
Lane Toran
Arnold (voice)
Christopher Walberg
Stinky Peterson (voice)
Steve Viksten
Oskar Kokoshka (voice)
Tress MacNeille
Miss Slovak (voice)