Lindsay calls on Voight and his unit for help with her first case on the federal task force; Burgess is relegated to desk duty.
Following the death of a 10-year old girl the intelligence unit have one option to gain access to their suspect, go on the inside. Ruzek and Atwater act as inmates to work the case from the inside. Outside prison, Voight and Olinsky follow-up on a good lead to answer some questions about the shooting. Meanwhile, Burgess and Roman show three boys around district thinking they are part of the Police Explorers program, only to realize that's not quite the case.moreless
Lindsay is at a crossroads regarding Charlie and Halstead convinces her to talk to Voight; Burgess copes with losing her shot in joining the Intelligence Unit; Voight discovers Jin is a Internal Affairs mole; The Intelligence Unit investigates stolen explosives at the construction site; and the team loses one of their own.moreless
The Intelligence Unit investigate a violent armed robbery in a bank; Burgess asks to go undercover on the case to prove herself; Platt asks Ruzek for an unusual favor off-the-books; and Halstead spends time with the family of his high-school sweetheart.moreless
Halstead is investigated for the murder of Lonnie Rodiger, which Voight suspends him pending investigation; The Intelligence Unit works on a missing when a missing torso is found in the car; Detective Sumner is given a chance to prove her worth in Intelligence; and Lindsay enjoy the late night visit from firefighter Kelly Severide.moreless
Olinsky's teenage daughter, Lexi witnessed a gang shooting, which would make her a target if she testifies; Ruzek helps Burgess on the undercover assignment; Halstead continues to investigate Lonnie Rodiger's activities; and Voight has to cope with the warnings of his IA contact Stillwell.moreless
Voight works with a former partner during an investigation, and he's also assigned a new Internal Affairs handler who doesn't trust him. Meanwhile, Halstead seeks help gathering information about Lonnie Rodiger; and Olinsky attempts to deflate Ruzek's ego and offers a boost to Atwater.moreless
Voight's son Justin is suspected to be involved in a murder of a man who has connections to the mob, which causes puts Voight at odds with Antonio and Voight's Internal Affairs handler, Erica Gradishar as the Intelligence Unit investigates the crime.moreless
In the conclusion of the crossover that started from Law & Order: Special Victims Unit, Voight and the Intelligence Unit enlist the help of New York PD Special Victims Unit detectives Fin Tutuola and Amanda Rollins to help track down a serial rapist/killer.moreless
Lindsay, wanting to make things better for Voight, tries her best to keep Justin out of trouble but it might not be that easy. When the Intelligence Unit gets word on a dangerous drug-smuggling operation, they want to make it stop and learn some secrets behind it so Olinsky and Ruzek go on a stakeout. Meanwhile, Atwater and Burgess receive a new patrol car.moreless
This time around the intelligence unit goes after a counterfeiting operation that could mess up and ruin things for the state. Meanwhile, Atwater and Burgess are sent after a hoarder to make her clean up or put her in jail and find something they didn't expect. Olinsky tries everything to protect his daughter and Voight has a decision to make regarding his son, who was recently released from prison.moreless
As a new case comes to light, the intelligence unit searches for the source of ammunition meant to kill officers of the police department. Voight and his unit investigate a home associated with some major gangs. Meanwhile, Ruzek is encouraged to seek counseling for personal reasons. Halstead has some very unwelcome visitors from his past.moreless
To start off the next case, one of their own, Antonio, is in a terrible position because his son gets kidnapped by members of a Columbian drug gang and the leader is in prison. During the rescue of the child, Halstead gains new information about Lindsay and her past.moreless
Chicago Police Department's newly-minted Intelligence Unit leads investigation into a string of murders possibly related to a Colombian drug gang; Desk Sergeant Trudy Platt has Officer Kim Burgess run an errand for her; Veteran undercover officer Alvin Olinsky recruits a rookie to the unit; and the attempted arrest of the assassin leads to tragedy that cost Intelligence Unit one of their own people.moreless
While Sarah tries to find calm from the after effects of the hanging, the detectives are assigned another unsettling case. Lyric finds herself lured back to her old way of life. Danette says goodbye.moreless
Sarah's life is on the line when someone close goes missing. Holder's past is brought to the forefront.
Sarah comes to terms with the results created by her past mistakes as Holder struggles with personal demons. Seward comes clean.