Leap year only comes once every four years, and for most, an extra day on the calendar is a mild novelty. But for Calendar Man, it's a critical error in that which he holds most dear--and now, Batman and the GCPD respond to a deadly hostage situation, but can they work together to stop Calendar Man before it's too late?

Then, Lois Lane dives deeper into a massive conspiracy--but will it swallow her up in the process?

And lastly, the Question--with the help of a surprise guest star--unmasks the mysterious villain Zero!