In the midst of a momentous rainstorm, Intelligence lends support to Officer Cook when she and her partner disagree about an investigation.

Assistant State's Attorney Chapman assists Intelligence with a sensitive investigation that drudges up painful memories for Voight.

Atwater struggles to find balance as he teams up with a forensic psychologist on an armed robbery case.

After tragedy strikes Intelligence, the unit must persevere during an adrenalized manhunt across the city.

A month after Voight's close brush with death, Intelligence is overwhelmed with cases as they catch a high-stakes drug bust.