Scooby-Doo and his friends give popular singers Sonny & Cher a ride after their car breaks down in a fierce storm. The kids take the two performers to the rambling, run-down Hideaway Hotel, an off-season beach retreat, where they have planned a delayed honeymoon away from the crowds. But soon, strange happenings interrupt the couple's happiness, and Scooby and the gang investigate.

While visiting a ski lodge, the gang run into bellhops Laurel and Hardy, who attempt to help the gang uncover the mystery of the ghost of Bigfoot... but Laurel and Hardy are even more cowardly than Scooby and Shaggy!

After seeing the sights in historical Boston, the gang is off to pay a surprise visit to Shaggy's Great Uncle Nathaniel. On the way they stumble upon The Harlem Globetrotters, who are picnicing and trying to rest up after a string of games they played around Boston. Back on the road to Uncle Nat's, Shaggy takes control of The Mystery Machine, and they begin to encounter ghosts resembling Paul Revere and soldiers of war in the road along the way. When the gangs get to Uncle Nat's, he reveals that the ghosts have scared everyone away -- and they're doing they're best to try to scare him away too. Soon the kids, Globetrotters and Uncle Nat begin running into ghosts all over the house. The following morning, everyone is on their way to a local cove when Uncle Nat tells them to keep their eyes peeled for a sea serpent that's been spotted in the lake -- subsequently Shaggy, Scooby, Meadowlark, and Curly encounter the the monster while scuba-diving. Fred and Velma come to the conclusion

When the gang stop at Moody Manor to get directions, they find themselves mistaken for Captain Moody's neices and nephews by an assortment of characters who all resemble Don Knotts.

When The Mystery Machine breaks down (as is expected) the gang bump into smugglers (loading crates into an airplane), Batman and Robin, a little old lady, and a punching clown filled with counterfeit cash. A tip leads them to the carnival. . .where they find Joker and Penguin behind the kooky counterfeit caper. As is usually the case with these villainous villains, our heroes wind up in a funhouse hideout.

When The Mystery Machine gets stuck, the gang find themselves paying a visit to nearby residents The Addams Family. But when Gomez and Morticia mistake them as the new housekeepers, the gang end up looking over the Addams home—and trying to find the missing Wednesday.But has someone kidnapped Wednesday or is the Addams home really haunted?

The gang accept Jonathan Winters' invitation to stay at Maude Frickert's farm, to take a break from chasing ghosts. But little do they realize that there's a phantom scarecrow running around the Frickert's farm....

The gang arrives on the set of Sandy Duncan's remake of "Dr. Jeckyll and Mr.Hyde" just in time to battle the werewolf creature who's trying to sabotage the film.

To rejuvenate the tourism that's dropped off since the rumors of ghosts have circulated, the gang helps former-Monkee Davy Jones prove that the Horseman of his Hagglethorn Hall is a phony.

The gang ends up in Juneberry (spoofing Mayberry), where Officer Don Knotts insists that they spend the night -- in jail...

When the gang find a lost dog, they return her to her owner, Phyllis Diller. They soon learn that Ms. Diller's house is haunted, presumably by the ghosts of her deceased husbands.But is it really ghosts. . .or someone trying to scare her into giving out the combination for her safe, which houses her priceless jewel collection?

ScoobyDoo and the gang team up with the Harlem Globetrotters basketball team again to solve the mystery of the ghost of Redbeard, the Pirate.

The gang teams up again with the Three Stooges, this time to unravel the mystery of the ghost of the Red Baron, who's scaring away all the crop dusting pilots.

In Batman and Robin's second appearance, Scooby and the gang try to foil Joker and Penguin's attempts to steal a flying suit from a goofy scientist.

Accepting an invitation from their friend Jerry Reed, Scooby and the gang arrive at the Country Music Hall – but Mr. Reed is nowhere to be found. Yet his music echoes through the halls. . .

When the Mystery Machine breaks down near The Three Stooge's ghost town theme park, the gang try to figure out who's been sabotaging the Stooge's rides and running away the tourists.