The search for the suspect in a shooting uncovers a surprising personal connection to Atwater and Val, raising questions about their relationship status.

Burgess' memory recall is put to the test following a deadly incident at her local diner.

Voight questions Deputy Chief Reid's motives in enacting a Violence Reduction Initiative across a neighborhood where numerous gangs are fighting for territory.

Ruzek grapples with his father's worsening condition while Intelligence searches for an elusive serial killer.

A mounting street war threatens a community-center project that Atwater is trying to get off the ground.

Intelligence makes a gruesome discovery that leads Torres to go undercover at the juvenile detention center where he served time as a teen.