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-Griffin

Daphne Blake / Dempsey (voice) (archive footage)

Jeff Bennett

(voice)

Heather North

Daphne Blake (voice) (archive footage)

Dee Bradley Baker

Keeper (voice) (archive footage)

Mindy Cohn

Velma Dinkley (voice) (archive footage)

Henry Corden

Ghost (voice) (archive footage)

Michael Bell

Mark (voice) (archive footage)

Mel Blanc

Speed Buggy (voice) (archive footage)

Pat Fraley

Uncle Carl (voice) (archive footage)