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IGN, Nickelodeon has announced that they will air a special one-hour 2D animated special, "Half-Shell Heroes: Blast to the Past." The special will feature the TMNT and supporting cast in the style of the Playmates Toys Half-Shell Heroes figures.
From IGN:
Told in the style of Playmates' Half-Shell Heroes action figure line, the storyline finds the Turtles going back in time to the Jurassic Era, where they encounter friendly dinosaurs from the past and dangerous aliens from the future who have a nefarious plan of their own. However, things get even more complicated when Triceritons, Bebop and Rocksteady show up!
Random House will also be publishing a "Blast to the Past" tie-in book, due in stores in September. "Half-Shell Heroes: Blast to the Past" will air on Nickelodeon Sunday, November 22.