Zero Hour

The Batman tales that tie into the epic "Zero Hour" storyline are now finally collected into one graphic novel in BATMAN: ZERO HOUR! Time is collapsing in on itself. The villainous Extant has ushered in a series of black holes that are swallowing the universe--past, present and future! The Bat-family, like everyone else in the DC Universe, has seen time loops affect their lives. The result? The return of Barbara Gordon as Batgirl, teenage Dick Grayson as Robin, and Bruce Wayne's parents, Thomas and Martha Wayne. Then, after the crisis in time as been averted, new details about the origins of Batman, Robin and Catwoman are revealed.