The gang try to solve the mystery behind the appearance of the 180-year-old man at a construction site.

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

Scooby Doo gang visit state of Georgia swamp pa and ma skillet trouble with ghost of gator ghoul

While driving through a terrible snow storm and low on gas, the gang come to the small town of Winterhaven, which seems to be deserted.

In Sleepy Hollow, the gang investigate the legendary Headless Horseman, when he shows up at a Halloween costume party at Crane Manor.

Shaggy's uncle inherits the old King Arthur castle and sends it to New England stone by stone. He also brought back the ghosts of Merlin and the Black Knight.

On vacation in Niagara Falls, the gang end up at a mental asylum haunted by a former doctor ghost, Dr. Coffin. When the kids notice ambulances coming and going with no patients, they decide to find out what they are really carrying.

The gang is having fun with their old friends who are now a music group. They are ready to sing a new song based on an ancient voodoo chant but they also bring back a long dead ancient shaman who plans to turn them into zombies.

The gang investigates the weird happenings of ancient demons who are after a talisman that will drive them back into the iron lid of an underground city where they belong.

A flying ghost bull is suspected to be responsible for the disappearance of many cattle at Daphne's uncle's dude ranch. Uncle Matt mysteriously vanishes

The gang's day of water-skiing comes to a halt when they get tangled up in a mystery involving missing pearls and a million-year-old shark monster.

The gang go on a cruise, aboard the Sea Prowler, and come into contact with the Ghost of Captain Pescado, the Octopus Monster, and the Kelp Monster, after their professor disappears.

The gang attends a Hawks football game when the star player vanishes and the ghost of a long-dead 1930s football player appears.

The Gang finds themselves in an abandoned Ice-Cream Factory which is haunted by a Strawberry, Chocolate and Vanilla ghost.

The gang gets locked up in the Smithsonian Institute for the night in Washington, D.C.