October 23, 1976 ★ 10.0 25 min
Overview
Going to Niagara Falls the gang ends up staying at an asylum being haunted by the ghost of Dr. Coffin. His two henchmen seem to be driving an ambulance taking patients, but are they really patients or are they hiding something?
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Top Cast
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)
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