As Nicole tries to track down the person behind an ominous photo, Pat takes Dion to BIONA, where they see a few things not on the official tour.

Dion’s powers continue to perplex an increasingly on-edge Nicole. Pat volunteers to investigate a possible lead into Mark’s past.

Following a run-in at school, Nicole has a difficult but necessary conversation with her son. A mysterious figure from Mark’s past resurfaces.

When a family is poisoned in their home, the team discovers a connection to the Becks. Ruzek goes undercover to work for their business, and as he gets closer to…

As they await news of Halstead’s fate, the team tries to focus on work, turning their attention to an illegal arms dealer. Atwater discovers his brother, Jordan, is back in…

Ruzek and Burgess’s secret begins to have severe implications for their police work. A series of deadly acts of vandalism causes tensions to run high in the insular neighborhood of…

When the son of an influential former officer is implicated in a murder, Moore pressures Voight to charge him quickly. The stakes are raised in Atwater’s fight against the blue…

While investigating a drug-related homicide, Intelligence is stonewalled by the ‘no-snitch’ culture of the neighborhood. And Atwater discovers a personal connection to the case. Meanwhile, the police’s own code of…

When Intelligence busts a meth lab run by gang leader Marshall Carter, they uncover a re-homing scam in which children adopted from foreign countries are abandoned, then sold online. Meanwhile,…