芝加哥警署

A month after Voight's narrow escape from death, Intelligence is swamped with cases as they crack a high-stakes drug racket.

Tragedy hits home for Intelligence, but there's no time for mourning. The team must immediately mobilise for a city-wide manhunt.

Grappling with equilibrium, Atwater collaborates with a forensic psychologist to unravel the intricacies of an armed robbery investigation.

When two teenage girls vanish, Sergeant Hank Voight and Intelligence work with ASA Nina Chapman.

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

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

Torres is haunted by his previous transgressions as Cook takes on a tense undercover assignment.

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.

An emotional case involving a mysterious young girl pushes Ruzek and Burgess to their limits.

With the suspects still at large and conditions worsening underground, first responders race against the clock to reach the trapped victims.

Intelligence makes a gruesome discovery that leads Torres to go undercover at the juvenile detention centre where he served time as a teen.

A mounting street war threatens a community-centre project that Atwater is trying to get off the ground.

Ruzek grapples with his father's worsening condition while Intelligence searches for an elusive serial killer.

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

Burgess' memory recall is put to the test following a deadly incident at her local diner.

The search for the suspect in a shooting uncovers a surprising personal connection to Atwater and Val, raising questions about their relationship.

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

Cook works with a confidential informant for the first time in a robbery-murder case with links to a star college athlete.

Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking.

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.