Batman and Killer Croc face off against Croc’s murderous offspring in a finale that has to be seen to be believed. The World’s Greatest Detective closes the world’s strangest case in the final issue of Garth Ennis and Liam Sharp’s twisted tale.

What strikes fear into the hearts of those who terrorize Gotham? It used to be Batman, but something far more frightening stalks the shadows-and it’s after Gotham’s villains, leaving a trail of carnage through the underworld. Now, with Riddler, Penguin, Two-Face, and many more left bloodied and broken in its wake, Batman opens the case on this mysterious reptilian menace and finds himself vexed by one very important question: What on Earth is it? Collects Batman: Reptilian #1-6.

What strikes fear into the hearts of those who terrorize Gotham? It used to be Batman, but something far more frightening than a mere man stalks the shadows-and it’s after Gotham’s villains. How savage must a monster be to haunt the dreams of monsters? Pick up this dark and bone-chilling tale by comics legends Garth Ennis and Liam Sharp to find out!

The monster-revealed! Trailing behind the mysterious reptilian menace savaging Gotham, Batman hits the streets hard searching for answers but finds only more questions. The Dark Knight takes his search beneath the streets and into the sewers to seek out Killer Croc. But when he finds the reptilian rogue, he quickly realizes that this may be the strangest case of his career.

Batman hits the streets in search of the creature terrorizing Gotham’s underworld-and hits them hard. First stop is the lair of the Penguin, but Oswald Cobblepot is at death’s door (which is better off than the beast left many of his cronies). The mangled rogue has no answers for Batman, but his blood-and the surprising secrets that it holds-will send the vigilante ever deeper into darkness...Batman hits the streets in search of the creature terrorizing Gotham’s underworld-and hits them hard. First stop is the lair of the Penguin, but Oswald Cobblepot is at death’s door (which is better off than the beast left many of his cronies). The mangled rogue has no answers for Batman, but his blood-and the surprising secrets that it holds-will send the vigilante ever deeper into darkness...

After following a trail of carnage, Batman has finally come face-to-face with the reptilian that's been menacing Gotham’s underworld. And this horrific creature only wants one thing: its mother. But who is its mother? Pick up this penultimate chapter to find out the impossible answer to that question!

Detective Blair Wong set her sights on Bruce Wayne as a source of information about the Batman-but neither of them was ready for the sparks that flew when they met. Unfortunately for their relationship, the imposter Batman has killed again, and the pressure is mounting to close the case…immediately!