Scooby-Doo, Where Are You is the first incarnation of the long-running Hanna-Barbera Saturday morning cartoon series Scooby-Doo. Season 2 begins with the gang encountering the Ghost of Mr. Hyde in the back of the Mystery Machine, who runs through a marsh and sneaks into a spooky house. The house turns out to be the home of Dr. Jekyll (great-grandson of the novel character), who fears he may be transforming into the ghost. What will the gang do next?