| Person | Type | Job | Role(s) |
|---|---|---|---|
 Casey Kasem | Cast | Actor | Shaggy Rogers (voice) (archive footage) |
 Don Messick | Cast | Actor | Scooby-Doo (voice) (archive footage) |
 Eddie Deezen | Cast | Actor | Gibby Norton (voice) (archive footage) |
 Frank Welker | Cast | Actor | Scooby-Doo / Fred Jones (voice) (archive footage) |
 Fred Tatasciore | Cast | Actor | Skeleton (voice) (archive footage) |
 Grey DeLisle | Cast | Actress | Daphne Blake (voice) (archive footage) |
 Hal Smith | Cast | Actor | (voice) (archive footage) |
 James Arnold Taylor | Cast | Actor | Burr Batson / Champ Truman (voice) (archive footage) |
 James Horan | Cast | Actor | Dr. Fleg / Bandit (voice) (archive footage) |
 Jean Vander Pyl | Cast | Actress | Sarah Jenkins (voice) (archive footage) |
 Jennifer Hale | Cast | Actress | Leora Lasswell (voice) (archive footage) |
 John DiMaggio | Cast | Actor | Mike Fury (voice) (archive footage) |
 John Stephenson | Cast | Actor | (voice) (archive footage) |
 Mindy Cohn | Cast | Actress | Velma Dinkley (voice) (archive footage) |
 Nicole Jaffe | Cast | Actress | Velma Dinkley (voice) (archive footage) |
 Rodger Bumpass | Cast | Actor | Announcer / Steve (voice) (archive footage) |
 Indira Stefanianna | Cast | Actress | Daphne Blake (voice) (archive footage) |
 Vic Perrin | Cast | Actor | (voice) (archive footage) |
 Frankie Ryan Manriquez | Cast | Actor | Jimmy (voice) (archive footage) |
 Victoria Bruno | Cast | Cindy (voice) (archive footage) | |
| Person | Type | Job | Role(s) |
