Frank Welker
Scooby-Doo / Fred Jones / Motoshondu (voice) (archive footage)
Casey Kasem
Shaggy Rogers (voice) (archive footage)
Grey DeLisle
Daphne Blake / Shawna (voice) (archive footage)
Mindy Cohn
Velma Dinkley (voice) (archive footage)
Jeff Bennett
Crunchy Granville / Fritz / Mr. Keenan (voice) (archive footage)
Mimi Rogers
Maura Ravenmane / Helga (voice) (archive footage)
Kevin Michael Richardson
Sharky Tazo / Stink Eye (voice) (archive footage)
John Stephenson
Zelig (voice) (archive footage)
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Eva Almos
Captain Corvina Cloyd (voice) (archive footage)
John Gabriel
Dr. Armand Zola / Worker (voice) (archive footage)