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! Mystery Incorporated
Prior to the volume releases the first episode in the series, "Beware the Beast from Below" was released as a bonus episode in the special features of "Scooby-Doo! Camp Scare" on September 14, 2010. "Menace of the Manticore" was also released as a bonus feature on "Big Top Scooby-Doo!" on October 9, 2012. Also, "When the Cicada Calls" from Season 1 and "The Devouring" from Season 2 were released on "Scooby-Doo! 13 Spooky Tales: For the Love of Snack!" on January 7, 2014. "Night on Haunted Mountain" was also released on "Scooby-Doo! 13 Spooky Tales: Field of Screams" on May 13, 2014.