Cast and credits of Happy Halloween, Scooby-Doo!

Directed by

Maxwell Atoms

Starring

Frank Welker
Scooby-Doo / Fred Jones (voice)

Matthew Lillard
Shaggy Rogers (voice)

Grey DeLisle
Daphne Blake (voice)

Kate Micucci
Velma Dinkley (voice)

Cassandra Peterson
Elvira, Mistress of the Dark (voice)

Bill Nye
Bill Nye (voice)

Dwight Schultz
Dr. Jonathan Crane / Scarecrow (voice)

Bumper Robinson
Mike (voice)

Roger Craig Smith
Autopilot / Parent (voice)

Fred Tatasciore
Alpha Jackal Lantern / Federal Agent Malarkey (voice)

David Herman
Sheriff / Cutler Toe (voice) (as Dave Herman)

Phyllis Diller
Self (archive sound)