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.
Scooby-Doo, Where Are You!
Scooby-Doo, Where Are You! is an American animated mystery comedy television series produced by Hanna-Barbera. Produced for CBS, the series premiered as part of the network's Saturday morning schedule on September 13, 1969, and aired for two seasons until October 31, 1970. In 1978, a selection of episodes from the later series "Scooby's All-Stars" and "The Scooby-Doo Show" were aired on ABC under the "Scooby-Doo, Where Are You!" name and, as such, is sometimes marketed as its third season.