Fred, Shaggy and Scooby try to solve the mystery behind the appearance of a 180-year-old man at a construction site.

The gang tries to solve the mysterious appearance of an ancient Aztec god who has caused the abandonment of the Cinco De Mayo festival in Mexico.

Scooby is asked by his cousin Scooby-Dum to investigate the mysterious appearance of a ghostly figure, threatening his owner's restaurant.

The gang investigates the mystery surrounding a high-voltage ghost who plans to destroy the local power plant.

The gang is having fun at a Halloween costume party with their friend who happens to be a descendant of Ichabod Crane; their fun turns into a nightmare when the headless horseman shows up.

Shaggy's uncle has inherits the old King Arthur castle and sends it to New England stone by stone; while visiting, the gang learns that he's also brought back the ghosts of Merlin and the Black Knight.