- cgmtx.com

Overview: Arnold and Gerald send the neighborhood alien crazy as they broadcast a mock Halloween radio show.

Dan Castellaneta

Grandpa Phil (voice)

Christopher Walberg

Stinky Peterson (voice)

Dom Irrera

Ernie Potts (voice)

Tress MacNeille

Grandma Gertie (voice)

Lou Rawls

Harvey (voice)

Baoan Coleman

Mr. Hyunh (voice)

Mary Scheer

Suzie Kokoshka (voice)

Kath Soucie

Miriam Pataki (voice)

Adam Wylie

Curly Gammelthorpe (voice)

David Wohl

Principal Wartz (voice)

Steve Viksten

Oskar Kokoshka / Smitty (voice)

Maurice LaMarche

Big Bob Pataki / Douglas Cain (voice)

James Keane

Mr. Green / EBN Announcer (voice)

Craig Bartlett

Monkeyman (voice; uncredited)