Krang. You may remember him as that goofy brain-in-a-gut from the old Teenage Mutant Ninja Turtles cartoon, but in IDW's current series, he's a much bigger threat than that old goof ever was. He's about to destroy the world, for pete's sake.
Let's let IDW describe the story thus far:
Stranded on the planet Neutrino in Dimension X with Fugitoid, the TMNT find themselves on unfamiliar ground. Recognizing a mutual threat in Krang, the TMNT join forces with the Neutrino Resistance Force and make a last-ditch effort to save the captured Neutrino royalty!
Check out this preview of Teenage Mutant Ninja Turtles #19, due out tomorrow from TMNT co-creator Kevin Eastman, Tom Waltz and Ben Bates.