When does A Pup Named Scooby-Doo return?

A Pup Named Scooby-Doo is an American animated mystery comedy series. It is the eighth incarnation of the Hanna-Barbera franchise. The series was developed by Tom Ruegger and premiered on September 10, 1988. It aired for four seasons on ABC until August 17, 1991. Don Messick and Casey Kasem were only original voice actors to reprise their roles.