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 on Zombie Island
It is the first in a long-running series of direct-to-video "Scooby-Doo" films; succeeded by "Scooby-Doo! and the Witch's Ghost" (1999). Production started at Hanna-Barbera, but was then completed by its then-new parent company, Warner Bros. Animation (which would produce all subsequent "Scooby-Doo" films). It was also the first of four "Scooby-Doo" direct-to-video films to be animated overseas by Japanese animation studio Mook Animation. The film was released direct-to-video on September 22, 1998 and premiered on Cartoon Network on October 31, 1998. The film received acclaim from critics who praised the animation, voices and writing. The film also has a much darker tone than the original series. Unlike in the original series, promotional commercials for the movie announced that "This time, the monsters are real!"