Happy Halloween, Scooby-Doo!: Cast
Frank Welker
Scooby-Doo / Fred Jones (voice)
Grey DeLisle
Daphne Blake (voice)
Matthew Lillard
Shaggy Rogers (voice)
Kate Micucci
Velma Dinkley (voice)
Cassandra Peterson
Elvira, Mistress of the Dark (voice)
Bill Nye
Bill Nye (voice)
Dwight Schultz
Dr. Crane, AKA: Scarecrow (voice)
Kamali Minter
Michelle (voice)
Bumper Robinson
Mike (voice)
Roger Craig Smith
Autopilot / Parent (voice)
Fred Tatasciore
Alpha Jackal-Lantern / Federal Agent Malarkey (voice)
David Herman
Sheriff, AKA: Cutler Toe (voice)