LAW & ORDER: SVU S4E14 "Mercy". When an infant is found dead in a cooler, it turns out the victim had a rare genetic condition that's fatal when the child is 5 years old. We got the cabbie from the T.V. show "Taxi", the blonde chick from "Lost" and Viola Davis as an attorney making sure her client gets away with murder. Guest Starring: Judd Hirsch, Elizabeth Mitchell