The Scooby-Doo Show You!" name and the final seven as segments of "Scooby's All-Stars". Despite the yearly changes in the way they were broadcast, the 1976–1978 stretch of "Scooby" episodes represents, at three seasons, the longest-running format of the original show before the addition of Scrappy-Doo. The episodes from all three seasons have been rerun under the title "The Scooby-Doo Show" since 1980; these "Scooby" episodes did not originally air under this title. The credits on these syndicated versions all feature a 1976 copyright date, even though some were originally produced in 1977 and 1978. Outside the United States, reruns aired on CBBC
Scooby-Doo joined with a new Hanna-Barbera show, "Dynomutt, Dog Wonder", to create "The Scooby-Doo/Dynomutt Hour" (the show became "The Scooby-Doo/Dynomutt Show" when a bonus "Scooby-Doo, Where Are You!" rerun was added to the package in November 1976). Joe Ruby and Ken Spears, now working for Silverman as supervisors of the ABC Saturday morning programs, returned the program to its original "Scooby-Doo, Where are You!" format, with the addition of Scooby's dim-witted country cousin Scooby-Dum, voiced by Daws Butler, as a recurring character. The voice cast was held over from "The New Scooby-Doo Movies" save for Nicole Jaffe, who retired from acting