Henry Corden

(voice)

Allan Melvin

Additional Voices (voice)

Casey Kasem

Shaggy Rogers / Additional Voices (voice)

Julie McWhirter

Additional Voices (voice)

Micky Dolenz

Supporting Voices / Additional Voices (voice)

Don Messick

Scooby-Doo / Additional Voices (voice)

Gary Owens

Blue Falcon (voice)

Virginia Gregg

Additional Voices (voice)

Larry McCormick

(voice)

Heather North

Daphne Blake (voice)

Patricia Stevens

Velma Dinkley (voice)

Bob Holt

Additional Voices (voice)

Daws Butler

Scooby-Dum / Additional Voices (voice)

Frank Welker

Fred Jones / Additional Voices / Dynomutt (voice)

Shirley Mitchell

Olivia / Additional Voices (voice)

Ron Feinberg

Additional Voices (voice)

John Stephenson

Additional Voices (voice)

Regis Cordic

(voice)