DC High Volume: Batman

Batman: The Long Halloween – Chapter 1 (1x5)

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Catwoman, the Joker, Poison Ivy, the Riddler—any one of these super-villains may prove to be the mysterious serial killer known as Holiday, a murderer who kills according to the calendar. Still early in his crime-fighting career, Batman must hone his detective skills to uncover the culprit's identity before they kill again!