In the series premiere, after a slew of brutal slayings, District 21 led by Sergeant Hank Voight go after a Colombian drug cartel cleaning house in Chicago. They discover ...

Antonio's son was kidnapped and he has a feeling the Colombian drug gang is to blame. Pulpo, the Colombian gang leader, is being held in jail and suggests his release may ...

Voight and team head to a house that's been associated with a number of top gangs. Events at the search result in Ruzek, being encouraged to seek some counseling which ma ...

More is learned about Halstead's dislike of the Rodiger family and it's family relationships all around as Olinsky shows a paternal side with his daughter Lexi in an atte ...

Atwater and Burgess are given a new patrol car, but are challenged with keeping it brand new. A run in with a psychotic woman leads the Intelligence Unit to discover a dr ...

Voight and Antonio enlist the help of agents at the Special Victims Unit in New York, Fin and Rollins, to help track down the culprit of a series of rape/murders. Burgess ...

The Fitori murder case is brought to the intelligence unit and Voight's son, Justin, may be involved. Gradishar fills Antonio in on the arrangement between Internal Affai ...

Voight's new internal affairs officer is skeptical of his actions. Voight must now work with his ex-partner from the gang unit. ...

In responding to a call Atwater and Burgess discover a gunshot victim and the only witness is Lexi Olinsky. The shooting is tied to a Latin gang. To protect Olinsky's dau ...

Voight pulls Halstead's badge when Lonnie Rodiger is found dead. After a car accident, Kelly Severide and Peter Mills discover the torso of Dr. Elliot, who has been instr ...

Voight and the team discover a massacre, eight million in cash stolen and two wounded men in a clearing house. During questioning, one guy, Perko, provides some intel tha ...

The Intelligence Unit race against the clock to find the bombers. ...

Commander Perry notifies the Intelligence unit that Pulpo has been released to help track down a dangerous cartel leader. This doesn't sit well with our team as he kidnap ...

As Antonio's life is now in question, Voight and Platt open up about their pasts. Jin is caught while tinkering with Voight's computer and uses the only scapegoat possibl ...

Atwater is settling into his new gig on intelligence as Antonio is relegated to desk duty while recovering. Lindsay finally realizes she has no way out and confides in Vo ...