Zach Galligan character Billy Peltzer
Phoebe Cates character Kate Beringer
John Glover character Daniel Clamp
Robert Prosky character Grandpa Fred
Robert Picardo character Forster
Christopher Lee character Doctor Catheter
Haviland Morris character Marla Bloodstone
Jackie Joseph character Sheila Futterman
Gedde Watanabe character Mr. Katsuji
Keye Luke character Mr. Wing
Kathleen Freeman character Microwave Marge
Don Stanton character Martin
Dan Stanton character Lewis
Shawn Nelson character Wally
Dick Miller character Murray Futterman
Paul Bartel character Theatre Manager
John Astin character Janitor
Henry Gibson character Employee fired for Smoking
Leonard Maltin character Himself
Hulk Hogan character Himself
Tony Randall character Brain Gremlin (voice)
Howie Mandel character Gizmo (voice)
Frank Welker character Mohawk (voice)
Belinda Balaski character Movie Theater Mom
Rick Ducommun character Clamp Center Security Guard
Julia Sweeney character Peggy
Raymond Cruz character Messenger
Jeff Bergman character Bugs Bunny / Daffy Duck / Porky Pig (voice)
Bubba Smith character Bubba Smith
Isiah Whitlock Jr. character Fireman
Dean Norris character SWAT Team Leader
