A mercy killer (of sorts) is harvesting organs for transplantation purposes---then killing the "donors." Meanwhile, Bailey learns from Behar that he's the target of a probe; and Chloe tells Sam that someone has been taking pictures of her in school.

A sniper targets drivers stuck in traffic jams, and with each shooting positions himself farther away from his victim. He also leaves a "message": a replica of an ancient Greek urn. Meanwhile, John can't figure out why Handleman is out to get him.