Scooby-Doo is a long-running American animated series produced for Saturday morning television in various versions from 1969 to the present. The original series was created for Hanna-Barbera Productions and Hanna-Barbera produced numerous spin-offs and related works until being absorbed in 1997 into Warner Bros. Animation, which has handled production since then. Although the format of the show and characters have varied significantly over the years, the most familiar feature a talking dog named Scooby-Doo and 4 teenagers: Fred "Freddie" Jones, Daphne Blake, Velma Dinkley, and Norville "Shaggy" Rogers.