S18, E7: After a mother and daughter are killed in a hit and run accident, Detectives Green and Lupo (Jesse L. Martin, Jeremy Sisto) track down the vehicle and find only a stack of $100 bills left inside. A trace on the money leads the detectives to a young couple that are victims of a real estate scam. Green and Lupo decide the best way to crack this case is to go undercover with the help of Kim Brody (guest star January Jones), an employee at the title company that handled the closings on the illegal real estate deals. Brody proves not to be who she claims, leaving her innocence and real identity in question. Also starring: Sam Waterston, S. Epatha Merkerson, Linus Roache, and Alana De La Garza.