Frank Welker Fred, Scooby Voice Mindy Cohn Velma Voice Grey DeLisle Daphne Voice Matthew Lillard Shaggy Voice Amy Acker Nova Guest Voice Dee Bradley Baker Gene Shepherd, Hodag Guest Voice Troy Baker Vronsky, Dispatcher Guest Voice Frances Conroy Angie Dinkley Guest Voice Jeff Bennett Gary, Ugly Jimmy Guest Voice Kate Higgins Mayor Janet Nettles Guest Voice Lewis Black Mr. E Guest Voice Clancy Brown Hebediah Grim Guest Voice Linda Cardellini Marcy "Hot Dog Water" Fleach Guest Voice Patrick Warburton Sheriff Bronson Stone Guest Voice Tia Carrere Judy Reeves Guest Voice Vivica A. Fox Cassidy Williams Guest Voice Mitch Watson Farmer Guest Voice, Writer Tim Matheson Brad Chiles Guest Voice Udo Kier Professor Pericles Guest Voice James Arnold Taylor George Avocados, Man B, Skinny Man Guest Voice Sam Register Executive Producer Spike Brandt Producer Tony Cervone Producer Victor Cook Director Michael Ryan Writer Curt Geda Director Benjamin Townsend Writer James Krieg Writer Doug Murphy Director Caroline Farah Writer Michael Goguen Director Joe Flaherty Writer Mark Banker Writer Lauren Montgomery Director Adam Beechen Writer Roger Eschbacher Writer Michael Townsend Writer Kay Reindl Writer Marly Halpern-Graser Writer