District 21 of the Chicago Police Department is composed of the uniformed cops, who deal with street crimes, and the Intelligence Unit, which deals with major crimes like drug trafficking and high-profile murders. Sgt Hank Voight - a tough boss who doesn't mind bending the rules a little in the pursuit of justice - heads the unit's elite team. The responsibilities of life on the force take a toll on the officers, as they struggle to balance their personal lives with the strain of the job. From Emmy-winning producer Dick Wolf.
A month after Voight's close brush with death, Intelligence is overwhelmed with cases as they catch a high-stakes drug bust. (S12, ep 1) Enhanced for UHD.
After tragedy strikes Intelligence, the unit must persevere during an intense manhunt across the city. (S12, ep 2) Enhanced for UHD.
Atwater struggles to find balance as he teams up with a forensic psychologist on an armed robbery case. (S12, ep 3) Enhanced for UHD.
Assistant State's Attorney Chapman assists Intelligence with a sensitive investigation that drudges up painful memories for Voight. (S12, ep 4) Enhanced for UHD.
In a rainstorm, Intelligence lends support to Officer Cook when she and her partner argue about an investigation. (S12, ep 5) Enhanced for UHD.
Burgess is put to the test as she looks to make an advancement in her career. (S12, ep 6) Enhanced for UHD.
Contribution: Torres is haunted by his previous transgressions as Cook takes on a tense undercover assignment. (S12, ep 7) Enhanced for UHD.
The unit learns the truth about a secret Torres has been keeping, as Deputy Chief Charlie Reid puts a focus on Intelligence. (S12, ep 8) Enhanced for UHD.
Cook turns to her family when Intelligence faces administrative roadblocks that threaten a kidnapping investigation. (S12, ep 9) Enhanced for UHD.
An unexpected visitor causes disruption for Ruzek and Burgess amidst an emotional investigation involving an unidentified young girl. (S12, ep 10) Enhanced for UHD.
In the Trenches - Part III: With the suspects still at large and conditions worsening, responders race to reach the victims. Part three of three. (S12, ep 11) Enhanced for UHD.
The Good Shepard: Intelligence makes a gruesome discovery that leads Torres to go undercover at the juvenile detention centre. (S12, ep 12) Enhanced for UHD.
A mounting street war threatens a community centre project that Atwater is trying to get off the ground. (S12, ep 13)
Ruzek grapples with his father's worsening condition while Intelligence searches for an elusive serial killer. (S12, ep 14) Enhanced for UHD.
Voight questions Deputy Chief Reid's motives in passing a Violence Reduction Initiative across a bad neighbourhood. (S12, ep 15) Enhanced for UHD.
Burgess' memory recall is put to the test following a deadly incident at her local diner. (S12, ep 16) Enhanced for UHD.
The search for the suspect in a shooting uncovers a surprising connection to Atwater and Val. (S12, ep 17)
Voight and Chapman work together to uncover Deputy Chief Reid's shadow dealings as Reid assigns Intelligence to a carjacking case. (S12, ep 18) Also in UHD.
Cook works with a confidential informant for the first time in a robbery-murder case with links to a star college athlete. (S12, ep 19)
Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking. (S12, ep 20)
Intelligence ups their pursuit of Deputy Chief Reid. As things escalate, Voight finds himself battling his own instincts. (S12, ep 21) Enhanced for UHD.
Vow: Ruzek and Burgess's wedding day arrives. Chapman grows closer to Voight and Torres faces the emotional fallout of his actions. (S12, ep 22) Enhanced for UHD.