In the second episode of this new animated Batman series, our hero retreats to his cave to examine forensics that soon prove more taunt than testimony. But it's not the innocent blood spilt during Zsasz's episode one rampage that vexes the Dark Knight; rather, Zsasz's blood itself is the provocation. The chemical compounds Batman discovers therein reveal Zsasz to be a mere pawn to a pair of villains, his blood delivering their calling cards: Scarecrow beckons in the form of a more potent version of his old fear toxin, while Riddler demands attention with trace amounts...