Chicago P.D.

When Kelton is found murdered, Voights grudge against the mayor elect puts him under suspicion. Upton and Halstead are eager to prove their sergeants innocence, but the more evidence they gather, the closer they come to doing the opposite.

Assets. When Atwater goes undercover in a dangerous South Side drug syndicate, he learns there may be more to its kingpin than meets the eye.

Familia. After a botched carjacking turns out to be something much bigger, Voight's unit goes toe to toe with a smart drug kingpin who only works with women.

Infection Part 3. PD chases a lead that could point to a case of bioterrorism and Will gets dangerously close to the suspect.

Brother's Keeper. A murder in a Bulgarian neighborhood results in a challenging investigation when locals won't talk to police. Ruzek has a clash with a patrol officer.

False Positive. The shocking murder of young boys affects Halstead. Crawford encourages Intelligence to use a new facial-recognition software to help identify a suspect, but the plan backfires.

Informant. Voight pulls Darius in after Crawford asks Intelligence to investigate a dangerous drug, but there is little trust in the relationship. When their plan to nail a dealer goes awry and another CI is murdered, the team must make a tough decision about Darius.

No Regrets. After injuring herself while pursuing a suspect, Burgess receives a shocking diagnosis. A homicide case turns into a missing persons case, with a sinister twist.

Absolution. Fall Finale. Halstead's secret ongoing relationship with a woman connected to another case puts him in jeopardy.

Mercy. As they await news of Halstead's fate, the team tries to focus on work, turning their attention to an illegal arms dealer. Atwater discovers his brother is back and could be tied to the case.

43rd And Normal. Ruzek and Burgess's secret begins to have severe implications. A series of deadly acts of vandalism causes tensions to run high in Canaryville. Atwater tries to reach out to his brother.

The Devil You Know. Voight makes a deal with Darius Walker to help bring down a rogue group of dirty cops dealing drugs that were supposed to be destroyed. Upton clashes with Voight and enacts her own form of justice.

I Was Here. After receiving a distressing 911 call, Burgess enlists the team's help to track down a girl caught up in a sex-trafficking ring.

Center Mass. A homeless man's murder leads Intelligence to a criminal who has evaded capture for years. Rojas has a troubling experience with a young mentally ill man.

Burden Of Truth. Part 2 of Crossover Intelligence searches for the dealer who caused multiple overdoses and is connected to Roman's missing sister. The case becomes a homicide when they find the dealer's dead body.

Intimate Violence. An armed robbery case quickly turns into a homicide investigation. When a suspect's background suggests domestic violence, Upton is forced to reckon with her childhood. Voight and Halstead butt heads.

Before The Fall. Voight enlists the help of a reformed gang member to get a key witness' testimony in a murder case. More lives are put on the line as a gang war brews.

Lines. Intelligence does everything they can to build a case against the elusive leader of a drug ring, but things get complicated when Rojas realizes someone she cares about might be involved.

Buried Secrets. The clock is on after Ruzek witnesses a woman's kidnapping and the team races to put the pieces together. Burgess tries to connect with Ruzek but he mysteriously distances himself from her.

Silence Of The Night. Atwater goes undercover to take down a gun trafficking ring, but discovers an officer from his past is undercover in the same organization.