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

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

Burgess is put to the test as she looks to make an advancement in her career.

The unit learns the truth about a secret Torres has been keeping, as Deputy Chief Charlie Reid puts a focus on Intelligence.

Cook turns to her family when Intelligence faces administrative roadblocks that threaten a kidnapping investigation.

Voight questions Deputy Chief Reid's motives in enacting a Violence Reduction Initiative across a neighborhood where numerous gangs are fighting for territory.

Voight and Chapman work together to uncover Deputy Chief Reid's shadow dealings as Reid assigns Intelligence to a carjacking case.

The showdown with Deputy Chief Reid intensifies when Intelligence narrows in on Otero.

Forced to cease operations while under investigation by Internal Affairs, Intelligence goes off-book to bring down Reid once and for all. Ruzek and Burgess consider delaying their nuptials amid the uncertainty.