Scooby-Doo and the gang visit the Smithsonian museum but find the place is haunted by Benedict Arnold, Major André and William Demont. Or so it seems. The gang will find a tunnel that leads to the U.S. Mint before they solve this spirited mystery. . . . Blue Falcon and his inept mechanical sidekick, Dynomutt the Dog Wonder, fight the evil Prophet. This sinister psychic has a devious way of making his predictions come true. Before this adventure is over, Dynomutt will pose as Swami Poochi and find himself and his blue buddy launched into outer space.
—J. Spurlin