When does Scooby's All-Star Laff-A-Lympics return?

Scooby's All-Star Laff-A-Lympics is a two-hour Saturday morning animated program block. The block featured five Hanna-Barbera series. The Scooby-Doo Show, The Blue Falcon & Dynomutt, Captain Caveman and the Teen Angels were among its segments. During the second season in 1978–79, the show was re-titled Scooby’s All-Stars and broadcast from September 9, 1978, to October 28, 1978.