Teenage Mutant Ninja Turtles (also known as TMNT 2003) is an American animation television series, based on the comic book characters of the same name. The series is mainly set in New York City. It first aired on February 8, 2003 and ended on March 27, 2010. The series marked the revival of the Teenage Mutant Ninja Turtles as a Saturday-morning cartoon on Fox's Fox Box programming block (later known as 4Kids TV).