The New Scooby and Scrappy-Doo Show the "New Scooby and Scrappy-Doo" title in 1983, and thirteen more episodes, composed of twenty separate segments were produced under the name "The New Scooby-Doo Mysteries" in 1984. At the time, Margaret Loesch, who served as supervising executive for the series, also worked for another animation production company Marvel Productions. For this incarnation of the show, Hanna-Barbera attempted to combine the most successful elements of both the original "Scooby-Doo, Where Are You!" format and the newer "Scooby-Doo and Scrappy-Doo" format. Daphne Blake, a character from the original "Scooby-Doo, Where Are You!" format, was added back to the cast after a
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