The discovery of Kelton’s body casts a long shadow over Voight, his past animosity toward the mayor-elect instantly making him a suspect. Upton and Halstead are determined to clear their sergeant’s name, yet with each piece of evidence they…

Atwater’s infiltration of a dangerous South Side drug syndicate reveals a complexity in its leader that initially eludes him. Halstead attempts to join Atwater in undercover work, but quickly finds himself at a disadvantage. Meanwhile, Voig…

What began as a failed carjacking escalates into something far more complex, drawing Voight's team into a confrontation with a sophisticated drug lord whose operations are exclusively managed by women. Amidst the escalating stakes, new recr…

With the perpetrator of Chicago's bioterror attack identified, the Chicago Police Department gears up for its most extensive manhunt to date. Upton finds herself caught between the urgent need to assist in the capture of the suspect and the…

A death in a Bulgarian district presents a difficult case, complicated by the community’s reluctance to cooperate with law enforcement. Ruzek finds himself at odds with a uniformed officer during the inquiry.

The brutal killing of the young boys deeply unsettled Halstead. Crawford urged Intelligence to deploy a newly developed facial-recognition program in the hopes of identifying a suspect, but the initiative proved disastrous.

Following Crawford’s request for an intelligence investigation into a potent new drug, Voight brings Darius into the fold, though a deep-seated distrust permeates their working relationship. Their operation to apprehend a dealer unravels, a…

Following an injury sustained while pursuing a suspect, Burgess receives a startling diagnosis. What began as a homicide investigation takes a disturbing turn, morphing into a search for a missing person. Voight is then confronted with a di…

Halstead’s clandestine affair with a woman linked to another investigation places him in a precarious position.

While they wait for word on Halstead, the team attempts to maintain focus, shifting their attention to an illicit arms dealer. Atwater learns that his brother, Jordan, has returned to Chicago and may have a connection to the unfolding event…

The clandestine nature of Ruzek and Burgess's secret begins to cast a long shadow over their police duties. A string of violent acts of vandalism ignites anxieties within the close-knit community of Canaryville. Atwater’s attempts to connec…

Voight struck a bargain with Darius Walker, seeking his assistance in dismantling a clandestine network of corrupt officers trafficking in narcotics slated for destruction. Meanwhile, Upton found herself at odds with Voight, pursuing a path…

The urgent 911 call left Burgess shaken. He immediately gathered the team, tasking them with finding a young woman ensnared in a network of sex trafficking.

The murder of a homeless man draws the attention of Intelligence to a criminal who has remained elusive for years. Meanwhile, Rojas confronts a disturbing encounter with a young man struggling with mental illness.

Detectives are pursuing a suspect linked to numerous overdoses, a person also implicated in the disappearance of Roman’s sister. The investigation escalates to a homicide inquiry following the discovery of the dealer's body. This storyline …

The armed robbery escalated with brutal speed, morphing into a homicide investigation. As the suspect's history hinted at domestic violence, Upton found herself confronting long-buried memories of her own past. Meanwhile, Voight and Halstea…

Voight seeks out a former gang member, seeking his assistance in securing testimony from a crucial witness in a murder investigation. The fragile peace is threatened as simmering gang tensions escalate, placing more lives in jeopardy.

Intelligence agencies worked tirelessly to build a case against the shadowy leader of a drug ring, but their efforts were thrown into disarray when Rojas began to suspect someone close to her might be implicated.

The incident left a shadow over Ruzek, the image of the woman's abduction imprinted on his mind. The team moved with urgency, piecing together the fragmented details of the crime. Meanwhile, Burgess attempted to bridge the gap between their…

Atwater infiltrates a network dealing in illegal firearms, only to uncover a shocking truth: a former colleague is operating undercover within the same criminal enterprise.