J.D. Daniels
Arnold (voice)
Francesca Marie Smith
Helga (voice)
Justin Shenkarow
Harold (voice)
Jamil Walker Smith
Gerald (voice)
Craig Bartlett
Brainy (voice)
Dan Castellaneta
Grandpa (voice)
Tress MacNeille
Grandma (voice)
Craig Bartlett
Arnold
Released
Bande-annonce