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 and Scrappy-Doo (1980 TV series)
The Scooby-Doo and Scrappy-Doo shorts represents the fifth incarnation of the Hanna-Barbera Saturday morning cartoon "Scooby-Doo" series. A total of 33 half-hour episodes, each of which included three 7-minute shorts, were produced over three seasons, from 1980 to 1982 on ABC. Thirteen episodes were produced for the 1980–81 season, and seven more for the 1981–82 as segments of "The Richie Rich/Scooby-Doo Show". The remaining thirteen episodes were produced as segments of "The Scooby & Scrappy-Doo/Puppy Hour" for the 1982–83 season. Out of the 99 shorts that were produced, 86 of them feature Scooby-Doo, his nephew Scrappy-Doo and Shaggy without the rest of the Mystery Inc gang, and the other 13 only feature Scrappy-Doo and Yabba-Doo.