Casey Kasem

Character: Shaggy (voice)

Grey DeLisle

Character: Daphne (voice)

Mindy Cohn

Character: Velma (voice)

Kathy Kinney

Character: Sheriff Ellen Perkins (voice)

Frank Welker

Character: Fred / Scooby-Doo / Headless Snowman (voice)

Peter Scolari

Character: Professor William Fagen Higginson (voice)

Mark Hamill

Character: Tommy's Father (voice)

Daryl Sabara

Character: Tommy (voice)

Jim Belushi

Character: Asa Buckwald (voice)