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Frank Welker as Scooby-Doo / Fred Jones (voice) (archive footage) |
 |
Casey Kasem as Shaggy Rogers (voice) (archive footage) |
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Grey DeLisle as Daphne Blake (voice) (archive footage) |
 |
Mindy Cohn as Velma Dinkley (voice) (archive footage) |
 |
მირანდა კოსგროუ as Miranda Wright (voice) (archive footage) |
 |
Jeff Bennett as General Niedermeyer (voice) (archive footage) |
 |
James Arnold Taylor as Frankie Martin / Shawn (voice) (archive footage) |
| Production | Rich Dickerson | Researcher |
| Production | Joseph Barbera | Executive Producer |
