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)

Heather North

Daphne Blake (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)

Joan Gerber

Additional Voices (voice)

John Stephenson

Additional Voices (voice)