When does Scooby-Doo and Scrappy-Doo return?

The original thirty-minute version of Scooby-Doo constitutes the fourth incarnation of the Saturday morning cartoon. It premiered on September 22, 1979, and ran for one season on ABC as a half-hour program. It aired internationally on BBC One in the UK from 1981 to 1984. It was the last Hanna-Barbera cartoon series to use the studio's laugh track.