Casey Kasem

Shaggy Rogers / Sheriff (voice) (archive footage)

Frank Welker

Fred Jones / Scooby-Doo (voice) (archive footage)

Nicole Jaffe

Velma Dinkley (voice) (archive footage)

Arlene Golonka

Debbie (voice) (archive footage)

Don Messick

Scooby-Doo / Ghost (voice) (archive footage)

John Stephenson

Ghost (voice) (archive footage)

Grey DeLisle

Daphne Blake / Dempsey (voice) (archive footage)

Jeff Bennett

(voice)

Dee Bradley Baker

Keeper (voice) (archive footage)

Mindy Cohn

Velma Dinkley (voice) (archive footage)