Half-Shell Heroes: Blast to the Past is an animated TV special developed my Nickelodeon spinning out of the Teenage Mutant Ninja Turtles franchise.
The short film finds the four turtle heroes transported to the Cretaceous period where dinosaurs roam. They team with said dinos, as well as Bebop and Rocksteady in a bid to stop the Triceraton Army and return home.
The cast includes Seth Green as Leonardo, Sean Astin as Raphael, Greg Cipes as Michelangelo and Rob Pausen as Donatello. Kate Mulgrew voices the Triceraton villain, General Zera. J.B. Smoove and Fred Tatasciore are Bebop and Rocksteady respectively.
The show aired on Nickelodeon in 2015.