's fourth season is a pivotal chapter that fundamentally altered the series' trajectory through major cast departures and a shift toward more topical story arcs. Airing from September 2016 to May 2017, the season consists of 23 episodes focused on the professional and personal fallout of Sgt. Hank Voight's (Jason Beghe) vigilante actions. 🎬 Key Character Departures and Arrivals
The season begins with Commander Emma Crowley (Barbara Eve Harris) investigating Voight and Lindsay for the murder of Justin Voight’s killer, a dark secret that strains their relationship.
A cross-show romance developed between Antonio Dawson and Chicago Fire 's Sylvie Brett.
