 Two men are killed, and in both instances, their organs are delivered to hospitals minutes before they are needed for transplant surgery. Sam and the team profile the murders and determine their suspect is someone who was probably an organ recipient in the past. Now he is returning the favor by providing organs for people with his same rare blood type. Meanwhile, Art Behar, Bailey s boss, sets him up to take a fall in a witness tampering scandal. But John, Marcus and George find evidence that clears Bailey and nails Behar once and for all. Elsewhere, Jack is displeased when he learns Sharon has struck up a friendship with the friendly proprietor of a local news stand. He kills the man to assert to Sharon that he is her one and only friend. Also, Chloe is followed by a man whom is revealed to be a private investigator hired by Sam s in-laws.