Arnold and Gerald try to play a Halloween prank on Grandpa by making him think aliens have landed in the city. However, the broadcast gets leaked and scares everybody in the city.
Phillip Van Dyke
as Arnold (voice)
Jamil Walker Smith
as Gerald Johanssen (voice)
Francesca Marie Smith
as Helga Pataki (voice)
Anndi McAfee
as Phoebe Heyerdahl (voice)
Justin Shenkarow
as Harold Berman (voice)
Christopher Walberg
as Stinky Petersen (voice)
Adam Wylie
as Curly Gammelthorpe (voice)
Steve Viksten
as Oskar Kokoshka / Smitty (voice)
Mary Scheer
as Suzie Kokoshka (voice)
Dom Irrera
as Ernie Potts (voice)
Baoan Coleman
as Mr. Hyunh (voice)
Lou Rawls
as Harvey (voice)
