Voight teams up with an unlikely ally to take a killer off the streets while fighting to bring his Intelligence unit back together.

The Intelligence Unit races against time when a man from Torres' own neighborhood is violently abducted.

A homicide in the neighborhood where Burgess and Ruzek reside forces the team to investigate complicated relationships within the tight-knit community they call home.

A string of violent robberies across the city digs up one family's secrets. A surprising detail of Voight's past resurfaces.

Atwater reunites with an old friend from his academy days after a bombing rocks downtown Chicago.

Torres is dragged into a deadly conspiracy when a routine errand takes a violent turn.

Voight's suspicions ring true when a violent break-in steers the Intelligence Unit back to a chilling figure from a previous case.

Voight and the team work together to uncover the truth of the Bell case before more lives are lost.

Platt finds herself challenged when a simple favor for a former recruit spirals into something far more devastating.