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.
List of Scooby-Doo characters
Scrappy remained an integral part of the "Scooby-Doo" franchise, on both television and in "Scooby"-related licensed products and merchandising, through the end of the 1980s. He was also briefly the star of his own seven-minute shorts — the "Scrappy and Yabba Doo" segments of "The Scooby & Scrappy-Doo/Puppy Hour". Teamed with his uncle Yabba-Doo and Deputy Dusty, he helped maintain law and order in a small town in the American west. In later years, the presence of Scrappy-Doo has been criticized as having had a negative effect on the various "Scooby-Doo" series of the 1980s. However, the gradual decline of "Scooby-Doo" has been credited to other factors as well, such as changes in format. Scrappy-Doo has become the symbol of an irritatingly overexuberant or cute character added to a series in an attempt to maintain ratings, a phenomenon also known as Cousin Oliver Syndrome. Due to the general perception of the character by audiences, Scrappy-Doo has not appeared in any Scooby-related spinoffs since the made-for-television movie "Scooby-Doo and the Reluctant Werewolf" in 1988, with four exceptions: