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 the Night" on a flight to one of the development meetings, and decided to rename the dog "Scooby-Doo" and re-rechristen the show "Scooby-Doo, Where Are You!" The revised show was re-presented to CBS executives, who approved it for production. The first episode of "Scooby-Doo, Where Are You!" "What a Night for a Knight" debuted on the CBS network Saturday, September 13, 1969. The original voice cast featured veteran voice actor Don Messick as Scooby-Doo, radio DJ Casey Kasem (later host of radio's syndicated "American Top 40") as Shaggy, actor Frank Welker (later a veteran voice actor in his own right)