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.