Darsteller und CrewMark HamillEmperor Caesar Saladicus (voice) (archive footage)Tara StrongAlexandra Viggi (voice) (archive footage)Frank WelkerScooby-Doo / Fred Jones (voice) (archive footage)Maurice LaMarcheAdditional Voices (voice) (archive footage)Grey DeLisleDaphne Blake / Dempsey (voice) (archive footage)Mindy CohnVelma Dinkley (voice) (archive footage)Kevin McDonaldJulian Libris (voice) (archive footage)Daran NorrisUgo DiRinaldi / Shopkeeper / Zombie (voice) (archive footage)Dee Bradley BakerCrusty McPeet / Keeper (voice) (archive footage)Nika FuttermanRutie Banez (voice) (archive footage)