Jill Monroe returns home only to find a woman who looks exactly like Rhiannon living there, hinting at reality being bent or overlapping. Meanwhile, in a parallel version of New York, Union and Caitlin Fairchild stake out the World Trade Center to see who—or what—is using it as a staging point. When zombies erupt from below, Union is forced to fight through the horde and carry an injured Caitlin away, underscoring just how off-kilter things have become.