Batman and Person of Interest Crossover. Bruce Wayne's number comes up, and Reese and Finch rush to figure out the case. But how much does Finch really know about Bruce, and how much does Bruce really know about Finch? "You see, madness, as you know, is like gravity. All it takes is a little push!"

What was the origin of that history-wiping program? Lucius Fox receives a visit from an old friend in the survellience business, Harold Finch. Harold has an... unusual request.