Richard Steven Horvitz

as Self

as Alpha (voice)

as Snap (voice)

as Zim (voice)

as Orange Haired Elf (voice)

as Grey Matter / Dispatcher (voice)

as Bob Zaiderman

as Billy / Harold / Pumpkin / Trick-or-Treater Eater (voice)

as Billy / Harold (voice)

as Grey Matter / Stinkfly Prisoner (voice)

as Billy / Billy's Dad (voice)

as Billy / Billybot / Harold / Pale Ghoulish Juror / Chippy the Squirrel (voice) (as Richard Horvitz)

as Danny

as Cheddar (voice)

as Stonehenge (voice)

as Kinch

as Alpha 5 (voice)

as Alpha 5 (voice)

as Alpha 5 (voice)

as Alan Eakian