As a personal favor, Deputy Commissioner Harris (Al Freeman Jr.) asks Pembleton (Andre Braugher) to conduct an unofficial investigation of a case involving a congressman. As a result of his generosity, Pembleton finds himself part of a wide-ranging coverup, in which he may wind up as the "fall guy." Meanwhile, a homicide case involving a homeless man is complicated when the victim's body keeps disappearing and reappearing; Felton (Daniel Baldwin) continues to be frustrated in his efforts to locate his kids; and Lewis (Clark Johnson) and Munch (Richard Belzer) tackle the case of a murdered biker. ~ Hal Erickson, Rovi