Teenage Mutant Ninja Turtles was an animated television series mainly set in New York City. The first episode aired on February 8, 2003 and ended on November 21, 2009, and it marked Fox reviving the franchise as a Saturday morning cartoon. They were helped by 4Kids Entertainment. It was part of 4Kids TV (formerly known as the Fox Box) & was also aired on Cartoon Network. The 2003 animated series was produced by 4Kids Entertainment and Mirage Studios, which owns a third of the rights to the show, and animated by Dong Woo Animation. The series migrated to The CW4Kids in its final season after 4Kids's contract with Fox ended. Nickelodeon now owns the rights of this series & any future Turtles series.