'The Fall of the House of Kane' part four! Alice's deadly plague of virus-ridden bats may have been torn from the sky, but she still roams free. Now Batman must do whatever it takes to stop her - even if that means going through her sister, Batwoman, to do it. Blood ties and betrayal wage war in a clash for control that's been in the making since the day Kate Kane put on the cowl: Batman vs. Batwoman!