Original air date: 10/31/2018 Runtime: 41:56 min. The wife of an alderman is beaten to death, and Voight (Jason Beghe) is under pressure from First Deputy Superintendent Brennan (guest star Anne Heche) to close the case. To elicit a confession, Upton (Tracy Spiridakos) tells a dark story about her childhood.
Original air date: 11/07/2018 Runtime: 41:35 min. Intelligence suspects the leader of a local mosque is behind the bombing of an Army recruitment station. After a second explosion, Voight (Jason Beghe) urges Halstead (Jesse Lee Soffer) to follow the facts and not let his time in the service cloud his judgment.
Original air date: 02/13/2019 Runtime: 41:58 min. The team travels to a Wisconsin gun show to take down a supplier who's manufacturing "cop killer" machine guns. Before going undercover together, Burgess (Marina Squerciati) discovers that Upton (Tracy Spiridakos) is dating Ruzek (Patrick John Flueger).
Original air date: 02/20/2019 Runtime: 41:58 min. Second part of a crossover with "Chicago Fire": Using information from Chicago Fire's Cruz, Intelligence chases down the robbery crew that’s been using the lockbox key. Voight (Jason Beghe) is under pressure to bring the crew to justice without tarnishing the reputation of a murdered firefighter who might have been involved.
Original air date: 04/03/2019 Runtime: 40:59 min. With the threat of a gang war looming, Voight (Jason Beghe) and Ray Price (guest star Wendell Pierce) must organize a peace summit to end the bloodshed before more innocent people get hurt. Burgess (Marina Squerciati) evaluates her future with Blair (guest star Charles Michael Davis).