Hanna and Barbera were appointed heads of the MGM cartoon department in 1955 and, when the department was cut two years later, left in order to set up Hanna-Barbera productions. The company was a huge success, turning out limited-animation series such as "The Flintstones" and "Yogi Bear" directly for TV.
After enjoyed a highly prolific period of producing animated series for TV (mostly the Saturday morning children's audience), the team re-entered the feature film market in 1990 with the release of the full-length animated film, "The Jetsons", which they co-directed as well.