Season 12 Episodes
1. Ten Ninety-Nine (1)
A month after Voight's close brush with death, Intelligence is overwhelmed with cases as they catch a high-stakes drug bust.
2. Blood Bleeds Blue (2)
After tragedy strikes Intelligence, the unit must persevere during an adrenalized manhunt across the city.
3. Off Switch
Atwater struggles to find balance as he teams up with a forensic psychologist on an armed robbery case.
4. The After
Assistant State's Attorney Chapman assists Intelligence with a sensitive investigation that drudges up painful memories for Voight.
5. Water and Honey
In the midst of a momentous rainstorm, Intelligence lends to Officer Cook when she and her partner disagree about an investigation.
6. Pawns
Burgess is put to the test as she looks to make an advancement in her career.
7. Contrition (1)
Torres is haunted by his previous transgressions as Cook takes on a tense undercover assignment.
8. Penance (2)
The unit learns the truth about a secret Torres has been keeping, as Deputy Chief Charlie Reid puts a focus on Intelligence.
9. Friends and Family
Cook turns to her family when Intelligence faces istrative roadblocks that threaten a kidnapping investigation.
10. Zoe
An unexpected visitor causes disruption for Ruzek and Burgess amidst an emotional investigation involving an unidentified young girl.
11. In the Trenches (III)
With the suspects still at large and conditions worsening underground, first responders race to reach the trapped victims, while the investigation into the assailants comes into focus. The crossover starts on Chicago Fire S13E11 In the Trenches (I) and Chicago Med S10E11 In the Trenches (II).
12. The Good Shepherd
Intelligence makes a gruesome discovery that leads Torres to go undercover at the juvenile detention center where he served time as a teen.
13. Street Jesus
A mounting street war threatens a community-center project that Atwater is trying to get off the ground.
14. Marie
Ruzek grapples with his father's worsening condition while Intelligence searches for an elusive serial killer.
15. Greater Good
Voight questions Deputy Chief Reid's motives in enacting a Violence Reduction Initiative across a neighborhood where numerous gangs are fighting for territory.
16. Seen and Unseen
Burgess' memory recall is put to the test following a deadly incident at her local diner.
17. Transference
The search for the suspect in a shooting uncovers a surprising personal connection to Atwater and Val, raising questions about their relationship status.
18. Demons
Voight and Chapman work together to uncover Deputy Chief Reid's shadow dealings as Reid assigns Intelligence to a carjacking case.
19. Name Image Likeness
Cook works with a confidential informant for the first time in a robbery-murder case with links to a star college athlete.
20. Black Ice
Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking.
21. Open Casket
The showdown with Deputy Chief Reid intensifies when Intelligence narrows in on Otero.
22. Vows
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.
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