Cynthia Nixon turns in a powerful performance as a woman with multiple personalities who may have abused and fatally harmed her daughter. As Detectives Olivia Benson and Elliot Stabler dig more deeply into the case - with initial resistance from Dr. Henry Carlisle -- Donovan continues to present even more personalities along with a harrowing twist to the case. For the detectives, it's a race against time to find the infant, while adjusting to sweeping changes in the SVU - a result from poor decisions made by the detectives that have spilled over to the squad.