Scooby-Doo has the distinction of being the longest-running cartoon on television. First appearing in 1969, the mystery-solving Great Dane has starred in 310 animated episodes of shows ranging from Scooby-Doo, Where Are You! to Scooby's All-Star Laff-A-Lympics to The Scooby and Scrappy-Doo Show. But Scooby-Doo has another important distinction. Since his name comes from the refrain "Scooby-dooby-doo" from the song "Strangers in the Night," Scooby-Doo is also the only cartooncanine inspired by a Frank Sinatra lyric!