Scooby-Doo, Where Are You! is a Saturday morning cartoon produced by Hanna-Barbera.
While walking home from the movies, Shaggy and Scooby-Doo discover a black suit of armor in a pickup truck, and the gang deliver it to the local museum. The kids later break into the museum to search for clues, after learning that the archaeologist who was transporting the suit is missing, and they find that the knight's armor has come to life.
The gang goes out on a boating expedition, but gets lost in a fog and crashes their boat on the mysterious Haunted Isle. They decide to venture to the abandoned Vázquez Castle on the island for help, but instead encounter a transparent phantom running loose, who threatens them to leave the island and never return.
The kids' beach party is interrupted by a ghost in a glowing deep sea-diving suit, who they think is connected with the disapperance of several yachts. The mystery leads the gang to a bay known as "The Graveyard of Ships" where they have a run-in with the ghost.
Thanks to Shaggy reading the map upside down, the sleuths end up in Gold City, an old mining town, haunted by the ghost of a miner from 1849 who is said to wander the mines looking for the last vein of gold.
When a series of local dognappings alarms prize-winning dog trainer Buck Masters, the gang offers to have Scooby-Doo pose as a decoy to catch the dognappers. However, their plan works too well as Scooby is himself dognapped, leading the gang to discover that the dognappers appear to be under the command of a ghostly Indian witch doctor.
The kids pay a visit to their friend Sharon Weatherby, whose Uncle Stuart has been cursed by the ghost of the family's neighbor, Elias Kingston. When Uncle Stuart disappears altogether, Mystery, Inc. ventures into the abandoned and allegedly haunted Kingston Mansion next door, in search of him and the ghost.
The gang get jobs as extras on Daphne's uncle John's set of his new movie The Ape Man of Forbidden Mountain, based on the legend of an ape man. However, the legend soon comes true and the ape man terrorizes the set and the gang.
The gang notice that the carnival Funland appears to be operating by itself, so they go to investigate. They soon discover a crazy robot running loose, but when they notify the caretaker, he and his wife are rebuffed, convincing the kids to solve the mystery.