query: What is the name of the first Scooby-Doo episode?
passage: 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.[17] Scooby's speech patterns closely resembled an earlier cartoon dog, Astro from The Jetsons (1962–63), also voiced by Messick.[2] 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.
passage: Scooby-Doo
Now president of ABC, Fred Silverman made a deal with Hanna-Barbera to bring new episodes of Scooby-Doo to the ABC Saturday morning lineup, where the show went through almost yearly lineup changes. For their 1976–77 season, 16 new episodes of Scooby-Doo were joined with a new Hanna-Barbera show, Dynomutt, Dog Wonder, to create The Scooby-Doo/Dynomutt Hour (the show became The Scooby-Doo/Dynomutt Show when a bonus Scooby-Doo, Where Are You! rerun was added to the package in November 1976). Joe Ruby and Ken Spears, now working for Silverman as supervisors of the ABC Saturday morning programs, returned the program to its original Scooby-Doo, Where are You! format, with the addition of Scooby's dim-witted country cousin Scooby-Dum, voiced by Daws Butler, as a recurring character.[1] The voice cast was held over from The New Scooby-Doo Movies save for Nicole Jaffe, who retired from acting in 1973. Pat Stevens took over her role as the voice of Velma.