Scooby-Doo
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) as Fred, actress Nicole Jaffe as Velma, and musician Indira Stefanianna Christopherson as Daphne. Scooby's speech patterns closely resembled an earlier cartoon dog, Astro from "The Jetsons" (1962–63), also voiced by Messick. Seventeen episodes of "Scooby-Doo Where are You!" were produced in 1969–70. The series theme song was written by David Mook and Ben Raleigh, and performed by Larry Marks.
What's New, Scooby-Doo?
What's New, Scooby-Doo? is an American animated mystery comedy series produced by Warner Bros. Animation for The WB television network; it is the ninth incarnation of the "Scooby-Doo" franchise that began with Hanna-Barbera's "Scooby-Doo, Where Are You!" and the first of such since the previous incarnation, "A Pup Named Scooby-Doo", ended in 1991. The series revives the format of "Scooby-Doo, Where Are You!", in which the title character and his companions, Fred Jones; Daphne Blake; Velma Dinkley and Shaggy Rogers, travel to varying locations solving mysteries; this format is modernized for "What's New, Scooby-Doo?", in which the characters utilize technology that did not exist at the time "Scooby-Doo, Where Are You!" first aired. It is the first television series in the franchise in which Frank Welker, Grey DeLisle and Mindy Cohn respectively portrayed the voices of Scooby-Doo, Daphne and Velma, as well as the final one in which Casey Kasem portrayed Shaggy, having originally quit the role following a dispute regarding the portrayal of the character.