Chicago P.D.

Voight is suspected in Kelton's murder.

When Atwater goes undercover in a dangerous South Side drug syndicate, he learns there may be more to its kingpin than meets the eye. Halstead tries to join Atwater undercover, but finds himself at a disadvantage. Voight petitions the brass to show Ruzek leniency in his court case.

Voight's unit faces a drug kingpin.

After zeroing in on the suspect responsible for the bioterrorism that's gripping Chicago, the PD prepares to undertake their biggest manhunt yet.

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.

A shocking murder affects Halstead.

Voight pulls Darius in as a CI.

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. Voight has to decide between justice and the letter of the law.

Halstead's relationship jeopardizes him.

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, Jordan, is back in Chicago and could be tied to the case. Voight faces the tricky task of how to deal with Halstead's shooter. Burgess finally makes her decision.

Ruzek and Burgess's secret begins to have severe implications for their police work. A series of deadly acts of vandalism causes tensions to run high in the insular neighborhood of Canaryville. Atwater tries to reach out to his brother, but only pushes him further away.

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.

Burgess helps a sex-trafficking victim.

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.

Intelligence looks for a drug dealer.

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

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.

Intelligence does everything they can to build a case against the elusive leader of a drug ring.

Ruzek witnesses a woman's kidnapping.

Atwater goes under cover.