Mickey O'Sullivan

The bounty on Halstead’s (Jesse Lee Soffer) head becomes a serious reality as an innocent bartender takes a bullet meant for him. Olinsky (Elias Koteas) tries to reason with Bembenek (guest star Jason Singer) to call off the hit, to no avail. Voight (Jason Beghe) and the team keep this investigation in-house to find the hired assassin. Meanwhile, after a tense interaction at district Platt (Amy Morton) and Nadia (guest star Stella Maeve) come to an understanding. Jon Seda, Sophia Bush, Patrick Flueger, LaRoyce Hawkins, Marina Squerciati, and Brian Geraghty also star. Markie Post and Paul Schulze guest star.

A live video is streamed online showcasing a tortured man being beaten and burned alive. Upon further investigation, the victim's identity is traced back to that of a man who had been previously locked up for statutory rape. When another attack of a similar nature occurs, Intelligence finds a connection between the crimes, suspected pedophiles, and group named the Perv Hunters. Meanwhile, Lindsay (Sophia Bush) runs into a few bumps in the road both personally and professionally.

Atwater goes undercover to take down a gun-trafficking ring, but discovers an officer from his past is undercover in the same organization.