S1·E14 211 Kidney

Chase and August thought they'd seen it all until they learn that the latest crimewave involves stealing kidneys from unsuspecting citizens. Racing to a downtown motel, they meet Andrew Green, the latest victim of the bizarre scheme. As Green is wheeled to an ambulance, he spots the prostitute who lured him to the scene of the crime where he was drugged and operated on, and Chase and August take off in pursuit. Det. Maria Vallejo goes undercover as a prostitute to assist in the detectives' investigation.