Don Messick

Scooby-Doo / Scrappy-Doo (voice)

Casey Kasem

Shaggy (voice)

Sorrell Booke

Sheriff Rufus Buzby / T.J. Buzby (voice)

William Callaway

Billy Bob Scroggins / Beaureguard / Horseman / Ape (voice)

Victoria Carroll

Sadie Mae Scroggins (voice)

Jerry Houser

Meako (voice)

Arte Johnson

Farquard / Skull Ghost (voice)

Rob Paulsen

Shreako / Dispatcher (voice)

Michael Rye

Mayor (voice)

Ronnie Schell

Freako / Demonstrator Ghost (voice)

Hamilton Camp

Ghostly Laugh (uncredited) (voice)

June Foray

Witch (uncredited) (voice)