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Bad heroin is causing overdoses in Chicago, and Intelligence is a man down with Voight suspended. Antonio takes charge, but Ruzek undermines his authority.
After discovering the true cause of the high-rise fire, Intelligence races to find the man responsible. And for Halstead, it's personal.
Politics get in the way as the team tries to rescue a teenage girl kidnapped by a robbery crew. Voight and Platt try to exonerate Olinsky.
A ride along goes sideways, and Burgess is faced with a difficult choice: follow the advice of Voight, or a potential new ally.
Fathers and Sons
While undercover, Ruzek discovers his father is working for a suspected drug dealer and is forced to ask the question: is his dad involved?
True or False
The wife of an alderman is beaten to death, and Voight is under pressure from First Deputy Superintendent Brennan to close the case. To elicit a confession, Upton tells a dark story about her childhood.
Intelligence suspects the leader of a local mosque is behind the bombing of an Army recruitment station. After a second explosion, Voight urges Halstead to follow the facts and not let his time in the service cloud his judgment.
Black and Blue
While CPD tries to take down a drug kingpin, Atwater faces a tough choice between doing what’s required to solve the murder of a young dealer and what’s best for the community.
In an attempt to dig himself out of a hole and save someone close to him, Antonio crosses a line that puts the entire team at risk.
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