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
"Scooby's All-Star Laff-a-Lympics" was retitled "Scooby's All Stars" for the 1978–79 season, reduced to 90 minutes when "Dynomutt" was spun off into its own half-hour and the 1969 reruns were dropped. "Scooby's All-Stars" continued broadcasting reruns of "Scooby-Doo" from 1976 and 1977, while new episodes of "Scooby-Doo" aired during a separate half-hour under the "Scooby-Doo, Where are You!" banner. After nine weeks, the separate "Where are You!" broadcast was cancelled, and the remainder of the 16 new 1978 episodes debuted during the "Scooby's All-Stars" block. The 40 total "Scooby-Doo" episodes produced from 1976 to 1978 were later packaged together for syndication as "The Scooby-Doo Show", under which title they continue to air.