The gang is low on money so they take jobs as hard hats. While investigating some mysterious safe robberies, they learn of a mysterious figure that's haunting the construction site.

The gang is on their way to Mexico for the fiesta but the party is canceled. The owner of the hotel that they are staying in tells them about a dead ruler's spirit that has come back to seek revenge on those who disturbed his rest. Things get even more weird when a strange stone statue comes to life.

The gang is on their way to see Scooby Dum, Scooby Doo's cousin. They learn that his owners Ma and Pa Skille used to be in the business of a making a special drink called Finokey Fizz, but business has been terrible because of a strange alligator creature.

While driving through a terrible snow storm and low on gas, the gang stops by an abandoned winter wonderland amusement park. The mayor tells the gang the story about why the park is closed. Years ago, a terrible storm short circuited the power. One of the workmen was sent up a power pole to repair some damage, but there was a power surge and his body was never found. His ghost comes back to seek revenge known as the 10,000 volt ghost.

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.

The gang is driving to New England. Shaggy's uncle has inherited the old King Arthur castle and sent it to New England stone by stone. When they get it there something is wrong. They learn that he's also brought back the ghosts of Merlin and the Black Knight.

The gang gets lost while driving and runs into a state trooper who warns them to stay away from an old abandoned hospital. It's rumored to be haunted by a doctor that went mad years ago.

Scooby witnesses a robbery at a coin store by a weird zombie. The gang chases the thief to a toy factory and learns that something else is there.

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 some ancient demons. They learn that the demons are after a talisman that will drive them back into the iron lid of an underground city where they belong.

The gang is having fun driving to Daphne's uncle's dude ranch but they run into some trouble. A flying ghost bull is suspected to be responsible for the disappearance of many cattle. Uncle Matt mysterious vanishes and the gang finds themselves up against Tumaka and an ghostly Indian.

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 goes on a cruise abord the 'Sea Prowler' and come into contact with the Ghost of Captain Pescado. Turns out the ghost is pretty ok for a ghost, just as long as you don't go near his undersea treasure trove like the gang decided to. Then, Captain Pescado can turn into a pretty mean ghost.

The gang is attending a Hawk's football game when the star player vanishes--and the ghost of a long dead 1930s football player shows up, propelling them into yet another mystery!

In Washington D.C., the gang gets locked up in the Smithsonian Institute for the night. This institute, if you don't know, is chock full of antiques, inventions, and of course Ghosts!