Super-villains HEATWAVE and CAPTAIN COLD don t like the FLASH, but they don t like each other either They face off in a climate-changing smackdown that could spell disaster for Earth s ecosystems. The FLASH tries to take the foes one-on one, but ends up encased in arctic ice. Unable to move, FLASH watches as HEATWAVE turns up the threat level by melting the frozen seabed . . . a sea full of explosive methane gas "

Turtles... in space! Krang is set to go on trial in Dimension X, but he has hired the cybernetic assassin Hakk-R to eliminate the witnesses set to testify against him. Meanwhile, the Turtles race to different planets in Dimension X to escort the witnesses to safety before Hakk-R gets to them first! Then, an enemy from Master Splinter's past is back and hungry for revenge. To get it, he'll summon the most dangerous foe that the Turtles have ever encountered-the Collectors, shape-shifting demons that can pass through dimensions at will and cannot be stopped once they have been summoned to harvest a soul. To save themselves, the Turtles team up with the Ghostbusters, the only people who have ever faced the Collectors and lived to tell the tale. Collects Teenage Mutant Ninja Turtles Universe issues #19-20, issues #73-75 of the ongoing Teenage Mutant Ninja Turtles series, the Dimension X miniseries, and the TMNT/Ghostbusters 2 crossover miniseries.

The IDW Collection presents the TMNT stories in recommended reading order. After meeting a good-natured inter dimensional time traveler named Renet, the Turtles become unstuck in time and go spinning into the past! Meanwhile, Shredder and Krang finally meet up, but will they be able to overcome their differences and join forces and Old Hob has perfected the art of making mutants! Plus, when a new invention goes haywire, the Turtles are sent to a whole new type of New York City. One with a whole lot more ghosts-and Ghostbusters! Collects Turtles in Time, issue numbers 38-44 of the Teenage Mutant Ninja Turtles ongoing series, and the TMNT/Ghostbusters crossover.