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....

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 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?

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.

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.

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

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!