The Turtles transport to the bizarre and dangerous Dimension X to put an end to the terror of Krang once and for all! TMNT has always been science fiction, but this time they're taking it to a whole new level! Leonardo, Michelangelo, Donatello, and Raphael face off against deadly new foes in a crazy space opera mash-up of classic martial arts and funky sci-fi action! But first, you are cordially invited to the centennial reunion of the Pantheon, the immortal family that influences the course of history. The main talking point: the fate of the Teenage Mutant Ninja Turtles!

Collects: issues #71–75 and Teenage Mutant Ninja Turtles: Free Comic Book Day 2017.