'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
Midway through the season (Episode 8), Antonio leaves the Intelligence Unit to join the State’s Attorney’s office as a chief investigator, a move designed to lead into the spin-off Chicago Justice . Chicago P.D. - Season 4
In "All Cylinders Firing," Desk Sergeant Trudy Platt (Amy Morton) is brutally attacked outside her father's home, leading to a personal and harrowing investigation into her past. 's fourth season is a pivotal chapter that
Part of a massive three-way crossover with Fire and Justice centering on the warehouse fire that killed Olinsky’s daughter. 🎬 Key Character Departures and Arrivals Midway through