This was the fourth studio Teenage Mutant Ninja Film, this one done in CGI (computer animation) 2007. All the other films were live-action and were made in the 90's. It takes place after the other three (Teenage Mutant Ninja Turtles 1990, Teenage Mutant Ninja Turtles II: The Secret of the Ooze in 1991, Teenage Mutant Ninja Turtles III in 1993).