When a young Latina woman is brutally murdered, Intelligence suspects she may have been working as a drug mule. With Antonio (Jon Seda) leading the case, the team's investigation takes them into the grim world of meat processing, and the discovery that there may be a different motive behind her death.
While investigating a drug-related homicide, Intelligence is stonewalled by the 'no-snitch' culture of the neighborhood. And Atwater (LaRoyce Hawkins) discovers a personal connection to the case. Meanwhile, the police's own code of silence is put to the test when Upton (Tracy Spiridakos) is asked about Ruzek's (Patrick John Flueger) rough altercation with a suspect.
The district is in a state of change - Lindsay has moved to New York- and the CPD is under scrutiny about the corrupt nature of its institution. Under the watchful eye of the city, the team attempts to bust a gun deal that quickly turns dicey when innocent civilians and children get involved. Tension erupts when Chief Lugo (guest star Esai Morales) brings in Denny Woods (guest star Mykelti Williamson) to review the shootout, and Halstead (Jesse Lee Soffer) becomes a key player in the outcome of the case.
After a van explodes during a Chicago street festival, a Muslim patrol officer Frank Toma (guest star Ben Youcef) goes missing and evidence quickly piles up pointing to his involvement. Burgess (Marina Squerciati) - who helped train Toma - is desperate to prove his innocence, even if that means going against her superiors.
A live video is streamed online showcasing a tortured man being beaten and burned alive. Upon further investigation, the victim's identity is traced back to that of a man who had been previously locked up for statutory rape. When another attack of a similar nature occurs, Intelligence finds a connection between the crimes, suspected pedophiles, and group named the Perv Hunters. Meanwhile, Lindsay (Sophia Bush) runs into a few bumps in the road - both personally and professionally.
When Lindsay (Sophia Bush) receives a panicked call from her mother Bunny (guest star Markie Post) whose boyfriend had just been shot, Lindsay must figure out the best way to approach the situation, as her mother is now a murder suspect. The case opens up when a group of high school students OD, and the drugs in question relate back to the situation with Bunny. In addition to her mother's issues, Lindsay finds herself up against the review board dealing with consequences of her actions.
While investigating the murder of a teenage boy, Voight (Jason Beghe) finds a connection with the murder weapon - linking it to a case that he worked on 17 years ago. While the victim's father (guest star Philip Casnoff), a prominent defense attorney, tries to get the case taken over by Area Central Homicide, Voight digs back into the old case under the watchful eye of his former partner, Lieutenant Denny Woods (guest star Mykelti Williamson).
When the team is called to an in-progress bank robbery, they come across Detective Hailey Upton (guest star Tracy Spiridakos) trying to take over the crime scene with her Robbery-Homicide unit - butting heads with Voight (Jason Beghe) in the process. As the robberies continue to be executed around the city, Lindsay (Sophia Bush) is forced to make a decision in the heat of the moment, revealing a surprising suspect behind the mask. While working on the case at the district, Upton is shocked to come across Platt (Amy Morton), who has a special connection to her past.
When Chicago's "Night Crawler" Bobby Trent (guest star Michael B. Woods) is murdered over a single piece of mysterious footage, Intelligence must investigate one of Chicago's wealthiest families -- uncovering a lineage of old money and secrets. Meanwhile, Burgess's (Marina Squerciati) sister Nicole (guest star Jules Willcox) arrives at the District for a visit, and presents an icy attitude towards Ruzek (Patrick John Flueger).
After encouraging her sister to spend a night out with friends, Burgess (Marina Squerciati) wakes to find that Nicole (guest star Jules Willcox) never made it home. As the guilt begins to eat at Burgess, the team in Intelligence bands together to make finding Nicole their main priority. The case kicks into high gear when she is found clinging to life in an El station.
Olinsky's (Elias Koteas) daughter remains in critical condition following a massive fire - leaving Intelligence on edge, but more determined than ever to track down the suspect. Voight (Jason Beghe) opens up the case, knowing that he has Stone (guest star Philip Winchester) and his team's full support in the investigation, and all of Firehouse 51 behind him to examine potential origins of the fire. Intelligence works to connect the dots between the building owner, those who were inside, and a string of potential suspects.
After being tipped off about a woman running barefoot through the woods, Intelligence is led to a kidnapping victim locked up in a shipping container. The bizarre scenario leaves Voight (Jason Beghe) questioning the legitimacy of the case, and sends the team on a twisted trail to get to the bottom of it. Meanwhile, a former relationship of Halstead's (Jesse Lee Soffer) comes back into the picture, much to the surprise of Lindsay (Sophia Bush).
When a charred body is found in a torched house, Intelligence must work to identify the victim, as well as a young boy who is found badly injured inside. As they look to determine the cause and who may have been involved, they are faced with a web of secrets and lies. Meanwhile, Lindsay (Sophia Bush) and Halstead (Jesse Lee Soffer) receive an odd warning about Rixton (guest star Nick Wechsler) that leaves them suspicious.
When Lindsay (Sophia Bush) is tipped off about a grieving father looking to avenge his daughter's death, Olinsky (Elias Koteas) goes undercover as a hitman-for-hire. With Gang Intelligence lacking enough evidence to arrest the original gangbanger in question, the team works to reinvestigate the case. Meanwhile, Ruzek (Patrick John Flueger) comes back after finishing his undercover assignment only to have Voight (Jason Beghe) knock him down to patrol duty.
The body of a 15-year-old girl is found crushed in an abandoned building after she runs away from a treatment center for troubled girls. Voight (Jason Beghe) sends Halstead (Jesse Lee Soffer) undercover as a guard to work from the inside at the center, where he believes the girls are trading sexual favors for something in return. Meanwhile, Platt (Amy Morton) feels guilty because the victim was brought into the District last year, and Platt doesn't remember her.
After the body of young woman is found with multiple gunshot wounds, Intelligence uncovers details of her case that are similar to other deaths. They work to link all of these murders together to pin down the serial killer, and appease the families of the victims who have been looking for answers. Meanwhile, Lindsay (Sophia Bush) decides to meet her biological father (guest star Tony Crane) for the first time, and Voight (Jason Beghe) welcomes Kenny Rixton (guest star Nick Wechsler) to the team when Ruzek (Patrick John Flueger) takes an undercover assignment.
When a mutilated sex offender is found dead, it is unclear if he was the victim of a hate crime, sexual assault or self-mutilation. As Intelligence questions those related to the case, they find themselves up against a private "special police" force who may be covering up illegal activities. Meanwhile, Halstead (Jesse Lee Soffer) runs Jimmy's (guest star Tony Crane) DNA to confirm that he is actually Lindsay's (Sophia Bush) father.
When a young officer is shot dead in the lobby of an apartment building, Intelligence looks to the latest known offenders who have threatened the police. But when a second officer is killed, the team finds that they are dealing with someone who is highly trained and knowledgeable. Voight (Jason Beghe) works to keep the case contained as they deal with Chicago's ever-present war against the police. Meanwhile, Lindsay (Sophia Bush) confronts Antonio (Jon Seda) about his new job with the State's Attorney.
Severide (guest star Taylor Kinney) is brought into the District for questioning after his car is found to have caused a deadly crash. As the investigation gets underway, the team works to uncover a group of car-jackers who may be the key to Severide's innocence. Meanwhile, Voight (Jason Beghe) pairs Burgess (Marina Squerciati) with Olinsky (Elias Koteas), who has a hard time feigning his excitement about this new partnership, and Lindsay (Sophia Bush) considers meeting her estranged father who is now out of prison.
After receiving a complaint from a frustrated neighbor, Burgess (Marina Squerciati) and Officer Sorensen (guest star Kevin Kane) arrive to the house of baseball player Jake McCoy (guest star Billy Burke), and find the dead body of a 16-year-old girl, Maya Collins (guest star Violett Beane). There is conflict within the case as Intelligence learns that Olinsky (Elias Koteas) and McCoy are friends, and McCoy admits that he was helping Maya and other girls try to escape the sex trade. Meanwhile, Burgess and Sorensen track down a thief who turns out to be a cop with a rocky past, and Lindsay (Sophia Bush) gets a mysterious flower delivery that may be tied to her past.
Voight (Jason Beghe) calls the team to investigate a homicide involving the only witness in a rape and murder case against an extremely young man, Oliver Tuxhorn (guest star Gus Halper). Intelligence looks into Tuxhorn's family and their finances as they try to determine if someone was paid to take out the victim. Meanwhile, Stone (guest star Philip Winchester) offers Antonio (Jon Seda) a job as lead investigator for the state attorney's office, and Burgess (Marina Squerciati) and Sorensen's (guest star Kevin Kane) body cameras capture a bizarre exchange with a man that they pull over.
When a car plows through a crowd of concert goers and gunfire erupts, Lindsay (Sophia Bush) and Ruzek (Patrick John Flueger) are on the scene. Unsure of the motive and concerned a terrorist group may be responsible, Voight (Jason Beghe) orders in Homeland security, customs and the F.B.I. to assist. At the same time, Burgess (Marina Squerciati) spots Atwater's (LaRoyce Hawkins) brother, Jordan (guest star Ahmad Nicholas Ferguson), out where he shouldn't be. The team use their connections to throughout the city to bring some peace to the community before more blood is shed.
When a call comes in reporting a car being stripped, Burgess (Marina Squerciati) and Tay (guest star Li Jun Li) respond and discover a badly beaten young man and his fiancé missing. Fearing a public relations nightmare Voight (Jason Beghe) and the team are on their best behavior as they search for answers and the missing woman. At the same time, Lindsay (Sophia Bush) surprises Halsted (Jesse Lee Soffer) with a big question. Commander Fogel (guest star Ian Bedford) berates Platt for going over his head to have Tay assigned to District 21. Also starring Jon Seda, Patrick John Flueger, Elias Koteas, LaRoyce Hawkins and Amy Morton. Guest starring Brian Tee, Samuel Hunt, Barbara Eve Harris and Sam Straley.
When Platt (Amy Morton) goes to her father Robert's (guest star Chelcie Ross) house for dinner, she warns him to be careful with his new girlfriend Natalie (guest star Lilia Vassileva). Following dinner, Platt is physically assaulted as she's getting into her car and is rushed to Chicago Med. Voight (Jason Beghe), Lindsay (Sophia Bush) and Halstead (Jesse Lee Soffer) arrive at the hospital to investigate, and a concerned Mouch (guest star Christian Stolte) finds himself being questioned. Meanwhile, Antonio (Jon Seda) leads the rest of Intelligence at the scene as they look into previous threats against Platt, but his attention shifts when he is called into Robert's townhouse and finds signs of an even more gruesome attack on Platt's father. Also starring Antonio Dawson, Patrick Flueger, Elias Koteas, Marina Squerciati, and LaRoyce Hawkins. Guest starring Marlyne Barrett, Colin Donnell, Barbara Eve Harris and Gideon Emery.
When the team finds the body of a widowed, single-mother in the trunk of her car, they are shocked to discover that the victim was in constant contact with Voight's (Jason Beghe) now-reformed son, Justin (guest star Josh Segarra). After Lindsay (Sophia Bush) and Voight find Justin has been attacked in the same manor and is critically injured, Antonio (Jon Seda) and the team know that Voight will be out for revenge. Meanwhile, Roman (Brian Geraghty) makes a difficult decision and Commander Crowley (guest star Barbara Eve Harris) has plans to make changes within the unit.
Intelligence investigates a gruesome case. Upon further examination, it appears the victim was wearing a CPD-issued wire at the time of his death. Meanwhile, Burgess (Marina Squerciati) meets her new partner, Julie Tay (guest star Li Jun Li), who came from one of the worst assignments in the city. Together they respond to their first call, and Tay shares details of her past. Additionally, Commander Crowley (guest star Barbara Eve Harris) confronts Lindsay (Sophia Bush) about why she and Voight (Jason Beghe) were at that location on the night that Intelligence pursued Justin's killer. Also starring Jon Seda, Jesse Lee Soffer, Patrick John Flueger, Elias Koteas, LaRoyce Hawkins and Amy Morton. Guest starring Jesse Spencer, Philip Winchester, Marlyne Barrett and Samuel Hunt.
After a hooded man open fires on their patrol car, Roman (Brian Geraghty) is left wounded and Burgess (Marina Squerciati) takes off after the shooter, briefly losing sight of him, and shoots when she relocates him turning in her direction with a glimmer of silver in his hand. No gun has been found at the crime scene and the shooter is identified as a 17-year-old honor student who will likely never walk again due to his injuries. Protests begin as the public views the case as another incidence of a police officer shooting an unarmed African American teenager. Assistant State Attorney Peter Stone (guest star Philip Winchester), the same man who sent Voight (Jason Beghe) to prison, has been assigned to help defend Burgess and conduct his own investigation under the supervision of State Attorney Mark Jefferies (guest star Carl Weathers). Stone and his team need to collect enough evidence to indict the teen and clear Burgess, but must tread with caution on this high profile case as tensions run high.
While responding to a call of shots fired at a family residence, Lindsay (Sophia Bush) and Halstead (Jesse Lee Soffer) discover the only survivor is the youngest daughter who is traumatized. While Lindsay and Dr. Charles (guest star Oliver Platt) evaluate the girl and see if she can help identify the killer, Antonio (Jon Seda) and Olinsky (Elias Koteas) look into a pyramid scheme "self-help" group for potential suspects. Meanwhile, Platt (Amy Morton) tries to make the case to Commander Crowley (guest star Barbara Eve Harris) for Burgess (Marina Squerciati) and Roman (Brian Geraghty) to remain partners.
When a call comes in about a woman stabbing a man then fleeing the scene, Burgess (Marina Squerciati) and Lindsay (Sophia Bush) go investigate and find a young woman with the weapon in her hand. The suspect turns out to be a victim and she tells Olinsky (Elias Koteas) that she was held hostage for months and her kidnapper attempted to psychologically manipulate her into forgetting her identity while he physically abused her. The team sets out to find the woman's abductor before he can harm anyone else. Meanwhile, tensions are high at the station when Ruzek (Patrick John Flueger) accuses Roman (Brian Geraghty) of having feelings for Burgess.
Responding to a call about a suspicious duffle bag at the Chicago Lakefront, Voight (Jason Beghe) is horrified to discover that the bag contains the frigid and unmoving body of a newborn baby. Determined to find the culprit who abandoned the infant, Intelligence receives a promising lead based on information provided by Chicago Med and Ruzek (Patrick Flueger) helps zero in on a potential suspect. Meanwhile, Voight is surprised to hear that his son is in town and Burgess (Marina Squerciati) and Roman (Brian Geraghty) grow closer.
While responding to a call of shots fired, Voight (Jason Beghe), Antonio (Jon Seda), Halstead (Jesse Lee Soffer) and the team come across a secret battered woman's shelter and discover the owner has been wounded and a resident of the shelter has been kidnapped. The team faces a challenge as the gunman is still at large and the identities of the women are kept confidential. Meanwhile, Burgess (Marina Squerciati) and Roman (Brian Geraghty) go undercover to track down a man robbing people by catfishing them on a dating app and Lindsay (Sophia Bush) opens up to Halstead about her past.
While out on a bank run for his off-duty security job at the dispensary, Halstead (Jesse Lee Soffer) and his co-workers find themselves under attack by a violent robbery crew which quickly becomes a full-scale shootout. Voight (Jason Beghe) and Lindsay (Sophia Bush) question the owner of the dispensary who mentions her business has received threats from local gangs upset she's cutting into their revenue. Meanwhile Roman (Brian Geraghty), Burgess (Marina Squerciati), Antonio (Jon Seda), Halstead, Ruzek (Patrick Flueger) and Atwater (LaRoyce Hawkins) follow-up on a lead and track down a potential suspect.
While working at a sobriety checkpoint, Burgess (Marina Squerciati) finds a duffel bag full of heroin in the truck of a respected college professor who claims to know nothing about how the drugs ended up there. Voight (Jason Beghe) decides to hold off on charging the unlikely suspect and Olinksy (Elias Koteas) and Antonio (Jon Seda) follow up on a lead to see who is behind the drug smuggling. At District, Roman (Brian Geraghty) expresses his desires to become a Field Training Office to Platt (Amy Morton) and Mouse (guest star Samuel Hunt) sets Halstead (Jesse Lee Soffer) up with an off-duty security job working for the attractive owner of a medical marijuana clinic.
When a young boy is executed, Intelligence turn to the boy's parents for information and upon further investigation, discover the father has a criminal background and was a part of a local gang. After another shooting in gang territory, this time nonfatal, Lindsay (Sophia Bush) and Halstead (Jesse Lee Soffer) speak to the victim's mother to see if the two crimes are related and Mouse (guest star Samuel Hunt) works to find a connection. To honor the deceased young victim, Antonio (Jon Seda), Platt (Amy Morton), Roman (Brian Geraghty), Burguess (Marina Squerciati), Mouse and a number of other CPD officers and members of the community come together for a candlelight vigil.
Lindsay (Sophia Bush) goes undercover in an effort to track down a rogue police officer targeting women leaving a local casino. When Detective Martin Watts (guest star Erik Jensen), who oversees all cases out of the casino, gets word of the investigation he becomes involved much to Voight's (Jason Beghe) dismay. After recent events, Burgess (Marina Squerciati) sets plans in motion to transfer Districts pending Platt's (Amy Morton) approval and Mouse (guest star Samuel Hunt) attempts to lift Ruzek's (Patrick Flueger) spirits by offering to set him up with a friend. Meanwhile, Antonio (Jon Seda) volunteers to take Roman's (Brian Geraghty) place in the upcoming boxing match against Jimmy (guest star Steven R. McQueen) from Firehouse 51.
After infamous criminal Gregory Yates (guest star Dallas Roberts) escapes from a New York prison, Lindsay (Sophia Bush) and the team learn that he intends to flee New York and is headed for Chicago. The SVU team informs Intelligence that Yates has been gathering information on Lindsay and after Platt (Amy Morton) calls in a triple homicide likely at the hand of Yates, Benson (guest star Mariska Hargitay) and Fin (guest star Ice-T) catch the next plane to Chicago. Upon investigation of the crime scene, the team learns that another tenant in the building is missing and they work to find a connection between Yates and the woman.
After a luxury condo is robbed, the team is shocked to learn that not only was the family fast asleep when the crime occurred, but their teenaged daughter was violated during the invasion as well. Voight (Jason Beghe) consults Jimmy (guest star Steven R. McQueen) from Firehouse 51 to confirm his suspicion that the family was knocked out by a powerful gas and Lindsay (Sophia Bush), Halstead (Jesse Lee Soffer), Atwater (LaRoyce Hawkins) and Ruzek (Patrick Flueger) go undercover to seek out the perpetrators. Meanwhile, Voight tries to help a former acquaintance get back on his feet and Platt (Amy Morton) and Mouch (guest star Christian Stolte) receive disappointing news regarding their upcoming wedding.
Voight (Jason Beghe) convinces Deputy Crowley (guest star Barbara Eve Harris) to bring in his former cellmate, Eddie Little (guest star Clancy Brown), as a CI for the unit in order to help bring down a big-time cocaine supplier and his local dealers. Antonio (Jon Seda) is skeptical of this decision but Voight puts him at ease when he opens up about his time in prison with Little. Meanwhile, Burgess (Marina Squerciati) makes a difficult decision regarding her relationship with Ruzek (Patrick Flueger) and Roman (Brian Geraghty) devises a plan to help fund Platt (Amy Morton) and Mouch's (guest star Christian Stolte) wedding with the help of Firehouse 51
When the decapitated body of a woman found in Lake Michigan is connected to Voight's (Jason Beghe) social circle, Lindsay (Sophia Bush) fears his relationship with the group may hinder his ability to approach the case objectively. Roman (Brian Geraghty) is having a hard time coping with recent events and an error in judgment causes him to make a grave mistake. Meanwhile, Olinsky (Elias Koteas) becomes upset when Antonio (Jon Seda) doesn't consultant him before making a decision that could affect Michelle's (guest star Madison McLaughlin) future.
A doctor with personal connections to Voight (Jason Beghe) is under investigation when four of his patients are committed to Chicago Med after an overdose of chemo. The doctor denies Lindsey (Sophia Bush) and Halstead (Jesse Lee Sofer) access to his files, but after obtaining a warrant the team is able to track down his patients and discover all of them have been poisoned with unnecessary chemo. Meanwhile, Burgess (Marina Squerciati) and Platt (Amy Morton) work together to clear Roman's (Brian Geraghty) name.
ntelligence sets out to find a missing teenaged boy who they believe poses a serious threat to the students at his wealthy school after finding disturbing drawings in his notebook. Meanwhile, Atwater (LaRoyce Hawkins) is eager to make a good impression on a prominent African American police Captain (guest star Eamonn Walker) and Olinsky (Elias Koteas) and Michelle (guest star Madison McLaughlin) find themselves in a difficult situation and turn to Ruzek (Patrick Flueger) and Burgess (Marina Squerciati) for help.
When Intelligence follows up on a tip Antonio (Jon Seda) and Halstead (Jesse Lee Soffer) received from a reliable informant about an upcoming drug trade, the team is shocked to discover the mutilated body of a man. Upon further investigation, the body is identified as a government official and when Olinksy (Elias Koteas), Ruzek (Patrick Flueger), Lindsay (Sophia Bush) and Halstead question the man's acquaintances they discover he had access to very important devices. Meanwhile, Burgess (Marina Squerciati) helps plan a surprise for Platt (Amy Morton).
After a botched undercover job, Ruzek is under scrutiny by the new Street Deputy Crowley (guest star Barbara Eve Harris) who will determine his future with the unit. A suspicious person call turns into a murder investigation when Burgess and her temporary partner Price (guest star Travis A. Knight) discover the body of a dead man in an SUV. After Mouse (guest star Samuel Hunt) identifies the victim as the owner of a security company, the unit soon realizes there might be more to his story. Halstead and Lindsay take a step forward in their relationship.
A suspicious person call turns into a murder investigation when Burgess (Marina Squerciati) and her temporary partner Price (guest star Travis A. Knight) discover the body of a dead man in an SUV. After Mouse (guest star Samuel Hunt)
identifies the victim as the owner of a security company, the unit soon realizes there might be more to his story. Meanwhile, Roman (Brian Geraghty) takes Andrew (guest star Vincent Shuster) out for a memorable daytrip and Platt (Amy Morton) offers Ruzek (Patrick Flueger) some assistance. Halstead (Jesse Lee Soffer) and Lindsay (Sophia Bush) take a step forward in their relationship.
While Platt tries to manage a chaotic desk area, a man struggling to get her attention takes a drastic action and demands that the unit find his missing daughter. At the same time, Commander Fischer (guest star Kevin J. O'Connor) informs Voight that Bunny (guest star Markie Post) is bringing up new accusations on a case from his past. Lindsay urges her mother to fix the situation. Meanwhile, Antonio is shocked to learn a secret Olinksy has been keeping.
After surviving a hit against him, Voight is convinced the culprit is a criminal he and Olinksy once put away and is determined to catch him before he injures anyone else. At District, Atwater accidentally spills information about Ruzek's past which unsettles Burgess and Platt assigns Burgess and Roman a high society dog-napping case.
Intelligence is in pursuit of Derek Keyes (guest star Bokeem Woodbine), number one on Chicago's Most Wanted list and heroin kingpin. Meanwhile, Halstead (Jesse Lee Soffer) tries to get through to Lindsay (Sophia Bush) as her downward spiral continues after her three-week absence from the unit. At District, Olinsky (Elias Koteas) opens up to Platt (Amy Morton) about a secret from his past.
While pursuing a gangbanger, Burgess (Marina Squerciati) and Roman (Brian Geraghty) come across the body of an eight-year-old boy who was reported missing. Intelligence launches an investigation to find the killer and Antonio (Jon Seda) and Lindsay (Sophia Bush) question a prime suspect. Meanwhile, Burgess confides in Ruzek (Patrick John Flueger) about Roman's suspicious behavior and Bunny (guest star Markie Post) heads to the Ivory Tower with a statement that could be detrimental to Voight's (Jason Beghe) career.
When multiple people are shot inside an athletic club intelligence work to find and take down the shooters before there's any more victims. When they discover that all the targets were from the same law firm it's apparent that it is a case of corporate revenge. Now they need to find out what the motive for these killings. Atwater (LaRoyce Hawkins) is dealing with his new assignment, while doing so he plays a key role in locating the shooters. Meanwhile Platt (Amy Morton) and Halstead (Jesse Lee Soffer) are trying to approach Lindsay (Sophia Bush) to see how she's coping with a recent death.
Retired Commander Perry (guest star Robert Ray Wisdom) enlists Voight (Jason Beghe) and the team to help extract his cop nephew from a unit of corrupt officers who are robbing drug dealers. When things go bad Voight must take down a younger, more violent version of himself. Meanwhile, Lindsay (Sophia Bush) struggles to stay clean. At the same time a woman from Olinsky's (Elias Koteas) past reaches out to him.
Benson (Mariska Hargitay) has traveled into Chicago to help Voight (Jason Beghe) and intelligence with a rape/murder case that is frighteningly similar to a case from New York a decade ago. She calls in Fin (Ice-T) and Amaro (Danny Pino) to assist. The prime suspect, Yates (Dallas Roberts) is let go after rigorous questioning. He then requests a meeting with Lindsay (Sophia Bush) and he warns of unintended consequences from what intelligence is doing.
As District 21 is struggling to come to terms with the loss of one of the team they are forced to put their personal feelings aside when a café is bombed. The unit has several suspects and only one good eye-witness, who happens to be a minor. Halstead (Jesse Lee Soffer) pulls some strings to convince the mom to let him question Isabella (guest star Haley Seda) on what she saw. Atwater (LaRoyce Hawkins) finds himself in hot water when he makes a crucial mistake. Thanks to the tech savvy Mouse (guest star Samuel Hunt) the team is able to gain important intel that could help solve the case. Meanwhile Voight (Jason Beghe) helps Platt (Amy Morton) when she comes up against several roadblocks in an attempt to get a memorial stone for their fallen member.
Intelligence responds to a drug robbery gone wrong and in their investigation it’s revealed that the first person Voight (Jason Beghe) ever gave his card to is linked to a double murder. Voight will fight to keep her family safe. At the same time, we learn the real reason why Halstead’s (Jesse Lee Soffer) brother Will (guest star Nick Gehlfuss) came to Chicago. Meanwhile Desk Sgt. Platt (Amy Morton) takes care of a young girl at district.
When the father of one of the dead girls explains that he paid Dennis Lee (guest star Kelvin Han Yee) to have her brought to America, this hits home with Olinsky (Elias Koteas). Lee is one of the Chicago's most wanted fugitives and escaped Olinsky once before. Intelligence isn't about to let Lee dupe them again and Olinsky's past files prove valuable in finding Lee's whereabouts. Meanwhile, Sean Roman (Brian Geraghty) has an altercation with a fellow officer which lands him in a bit of trouble. At the same time Platt (Amy Morton) helps prepare Nadia (guest star Stella Maeve) to take her polygraph test after passing the CPD written exam.
Commander Fischer (guest star Kevin J. O’Connor) updates Voight (Jason Beghe) on a missing officer that Narcotics had deep undercover with a robbery crew. Antonio (Jon Seda) connected with one of the crew members years ago, so he’s asked to reestablish contact to help them find the officer. Meanwhile, Roman (Brian Geraghty) and Burgess (Marina Squerciati) are dealing with a squatter situation and they enlist Chicago Fire’s Mouch (guest star Christian Stolte) to help.
With a World Trade conference in Chicago, all members of intelligence are undercover in various protest groups to determine potential threats. Ruzek (Patrick Flueger), infiltrates the Black Grid group and befriends Sierra (guest star Lucy Blehar). When she ends up dead intelligence is suspicious of an Argentine Secretary, Fabian Sosa (guest star Gary Perez). Voight (Jason Beghe) and Olinsky (Elias Koteas) question Sosa about the death and the team enlists Mouse (guest star Caleb Hunt) to help with their tech needs in tracking Sosa. Meanwhile Halstead’s (Jesse Lee Soffer) brother, Dr. Will Halstead (guest star Nick Gehlfuss) shows up in town for an undetermined amount of time and is already stirring up trouble.
Bunny (guest star Markie Post) comes to Lindsay (Sophia Bush) concerned about a suspicious repeat customer at her husband’s rental company. This lead brings Intelligence into a case which robbery-homicide has been working for months. Detective Gina Gawronski (guest star Angelique Cabral) downloads their intel to the team, she also happens to be Antonio’s (Jon Seda) former co-worker from Vice. Voight (Jason Beghe) doesn’t trust Bunny’s motives for the tip.
With her recent decision to stay on the beat, Burgess (Marina Squerciati) begins to feel a little regret. While at a convenience store she sees some suspicious activity and pursues it without calling in for backup. Roman (Brian Geraghty) warns against it, but it’s too late, Chang (guest star Rich Ting) confiscates their guns and radios. They are
trapped with no means to communicate out for support. Meanwhile, it’s a slow day in intelligence and they are spending the day receiving taser certification.
During the investigation of a brutal home invasion leaving a mother and her daughter dead, all signs point to the father as the main suspect. Ruzek must work alongside his estranged patrolman father. Burgess and Roman get through their first shift back on the beat. Alex Manette, Bailey Chase, David Eigenberg, Patrick Mulvey, Mark Pellegrino guest. (Herrmann from CF)
Antonio (Jon Seda) and his sister Gabriela (guest star Monica Raymund) go to the office of Adrian Gish (guest star Robert Knepper), the man they believe started the fire that killed Shay. Intelligence along with patrol officers Burgess (Marina Squerciati) and Roman (Brian Geraghty) put pressure on Gish to try and make him confess. Lindsay (Sophia Bush) approaches Voight (Jason Beghe) about returning to Intelligence when she realizes that the task force isn’t what she thought it would be. At the same time Desk Sgt. Platt (Amy Morton) is acting strange and has everyone curious as to why she’s being overly cheery, friendly and nice. Also starring Jesse Lee Soffer, Patrick Flueger, Elias Koteas, and LaRoyce Hawkins. Eamonn Walker, Charlie Barnett and Markie Post guest star.
With Burgess (Marina Squerciati) in the hospital after suffering gunshot wounds, the intelligence team is determined to find the people responsible. Lindsay (Sophia Bush) delays her start so she can help with this case. Search of the house provides a lead and when a bomb is triggered a key suspect is found. Meanwhile the team takes turns watching over Burgess.
Intelligence is deputized by Lindsay's Task Force to help cripple a major Mexican drug cartel by bringing down their massive money smuggling ring. Burgess takes over Platt's desk on her first day back at work, and Roman deals with his guilt over Burgess' shooting. Halstead and Lindsay realize Voight's dating rules no longer apply to them. Raul Urbina, Kylie Rosales, David Lang guest.
While Antonio (Jon Seda) continues his off-duty security job for Asher (guest star Michael Park) and Layla (guest star India De Beaufort), Asher is killed. Voight (Jason Beghe) and Olinsky (Elias Koteas) make sure Antonio is covered. While they work the case Halstead (Jesse Lee Soffer) and Lindsay (Sophia Bush) go undercover in a rather uncomfortable location.
A friend of Nadia’s (Guest star Stella Maeve) leads the intelligence unit to a huge heroin bust. Unfortunately this bust results in Olinsky (Elias Koteas) arriving home to find the suspects are holding his wife (guest star Melissa Carlson). Voight (Jason Beghe) and the team think they’ve found a common thread with the suspects but it’s not who they think. Meanwhile Burgess (Marina Squerciati) and Roman (Brian Geraghty) are given an assignment where they get paired with a K-9 officer, Jenn Cassidy (guest star Spencer Grammer) who is Roman’s former partner and girlfriend.
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 (Patrick Flueger) and Atwater (LaRoyce Hawkins) act as inmates to work the case from the inside. Outside prison, Voight (Jason Beghe) and Olinsky (Elias Koteas) follow-up on a good lead to answer some questions about the shooting. Meanwhile, Burgess (Marina Squerciati) and Roman (Brian Geraghty) show three boys around district thinking they are part of the Police Explorers program, only to realize that’s not quite the case.
Two teenage girls have gone missing and the team know the clock is ticking to find them. Halstead (Jesse Lee Soffer), Antonio (Jon Seda) and Lindsay (Sophia Bush) investigate a tenement which gives them a much needed lead. Voight (Jason Beghe) brings the father of one of the girls to district in order to get some honest answers.
While trying to help out Olive (guest star Caroline Neff) Voight (Jason Beghe) is attacked and taken. When he doesn’t show for work the team gets suspicious and begin investigating. Ruzek (Patrick Flueger) and Atwater (LaRoyce Hawkins) prove they do belong on the team when they demonstrate smarts and savvy tracking down a lead that will hopefully bring them to Voight. Meanwhile Burgess (Marina Squerciati) and Roman (Brian Geraghty) are trying to track down a girl who has run off with a police badge.
Intelligence begins to look into a string of murders where the victims have a dollar bill pinned to their chests. Thanks to some digging by Ruzek (Patrick Flueger), Voight (Jason Beghe) learns his friend was involved in some shady business dealings. Antonio (Jon Seda) and Halstead (Jesse Lee Soffer) follow-up on some leads that help focus in on the culprit and motives for the murders.
The bounty on Halstead’s (Jesse Lee Soffer) head becomes a serious reality as an innocent bartender takes a bullet meant for him. Olinsky (Elias Koteas) tries to reason with Bembenek (guest star Jason Singer) to call off the hit, to no avail. Voight (Jason Beghe) and the team keep this investigation in-house to find the hired assassin. Meanwhile, after a tense interaction at district Platt (Amy Morton) and Nadia (guest star Stella Maeve) come to an understanding.
Atwater (LaRoyce Hawkins) is settling into his new gig on intelligence as Antonio (Jon Seda) is relegated to desk duty while recovering. Lindsay (Sophia Bush) finally realizes she has no way out and confides in Voight (Jason Beghe) for help. Meanwhile Jin (Archie Kao) is confronted about his secret meetings with Stillwell (guest star Ian Bohen).
As the Sheldon Jin murder investigation moves forward, Voight (Jason Beghe) is under close watch by Internal Affairs but he’s still in complete command of the intelligence unit. A routine undercover job becomes anything but when Voight’s SUV is T-boned while trailing an armored car carrying Ruzek (Patrick Flueger). At District, Burgess (Marina Squerciati) meets her new partner, Sean Roman (Brian Geraghty) and tension is high from the start.
Commander Perry (guest star Robert Ray Wisdom) notifies the Intelligence unit that Pulpo (guest star Arturo Del Puerto) has been released to help track down a dangerous cartel leader. This doesn’t sit well with our team as he kidnapped one of their own and no love is lost between sides. Meanwhile, Ruzek (Patrick John Flueger) gets some difficult news as a blast from Lindsay’s (Sophia Bush) past comes back, giving us a glimpse at where she came from.
As Antonio’s life is now in question, Voight and Platt (guest star Amy Morton) open up about their pasts. Jin is caught while tinkering with Voight’s computer and uses the only scapegoat possible to keep him in the clear. At the same time with Charlie (guest star Billy Wirth) back in town Lindsay realizes she’s going to have to come clean about a few things.
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 (guest star Dusan Faeger), provides some intel that is key to the case and leads Antonio to realize that two gangs were involved. Burgess steps up to help the unit and prove herself to Voight.
The Intelligence Unit works to find the bombers. Even with government agencies in the mix, Voight and his team work the case from their own angles and connections. Lindsay and Antonio question doctors who handled the transplant surgery for an Ambassador from Syria, but no clues emerge. Olinsky gets some solid intel and the team work from there. It’s a race against time as they realize there may be additional bombs targeted to detonate.
In responding to a call Atwater (LaRoyce Hawkins) and Burgess (Marina Squerciati) discover a gunshot victim and the only witness is Lexi Olinsky (guest star Alina Taber). The shooting is tied to a Latin gang. To protect Olinsky’s (Elias Koteas) daughter, Voight (Jason Beghe) takes the case from the Gang Unit.
Voight pulls Halstead’s badge when Lonnie Rodiger is found dead. After a car accident Severide (guest star Taylor Kinney) and Clarke (guest start Peter Mills) discover the torso of Dr. Elliot who has been instrumental in putting away high profile criminals. With Intelligence down one Sumner (guest star Sydney Tamiia Poitier) is given an opportunity to prove herself.
The Fitori murder case is brought to the intelligence unit and Voight’s (Jason Beghe) son, Justin (guest star Josh Segarra), may be involved. Gradishar (guest star Robin Weigert) fills Antonio (Jon Seda) in on the arrangement between Internal Affairs and Voight which increases friction between Voight and Antonio. Back at the precinct Ruzek (Patrick Flueger) helps Burgess (Marina Squerciati) get back at desk sergeant Platt (guest star Amy Morton).
Voight (Jason Beghe) is assigned a new Internal Affairs handler, Stillwell (guest star Ian Bohen) who proves to be suspicious of Voight’s actions. During an investigation involving a gambling ring Voight is forced to work with his former partner from the Gang Unit, Shi (guest star Mark Dacascos). At the same time Halsted (Jesse Lee Soffer) remains fixated on Lonnie Rodiger (guest star Matthew Sherbach) and enlists Jin’s (Archie Kao) help to gather more information.
Atwater (LaRoyce Hawkins) and Burgess (Marina Squerciati) 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 drug smuggling operation which has put several girl’s lives in peril. Voight’s (Jason Beghe) overprotective act with Lindsay (Sophia Bush) leads her right where he doesn’t want as she also helps to keep Justin out of trouble.
Voight (Jason Beghe) and Antonio (Jon Seda) enlist the help of agents at the Special Victims Unit in New York, Fin (guest star Ice T) and Rollins (guest star Kelli Giddish), to help track down the culprit of a series of rape/murders. Burgess (Marina Squerciati) has an opportunity to prove herself to Intelligence. Elsewhere Lindsay (Sophia Bush) enlists the help of Halstead (Jesse Lee Sopher) to act as her date for her high school reunion to get back at an old rival.
Voight (Jason Beghe) and team head to a house that’s been associated with a number of top gangs. Events at the search result in Ruzek (Patrick Flueger), being encouraged to seek some counseling which may have lasting repercussions professionally and personally. Meanwhile Halstead’s (Jesse Lee Soffer) temper rises when he comes in contact with some unwelcomed people from his past.
More is learned about Halstead’s (Jesse Lee Soffer) dislike of the Rodiger family and it’s family relationships all around as Olinsky (Elias Koteas) shows a paternal side with his daughter Lexi (guest star Alina Taber) in an attempt to protect her and as Voight’s (Jason Beghe) trying to help his son who has recently been released from jail. Meanwhile the Intelligence Unit investigates a counterfeiting operation after discovering some high end cloth-like paper.
In the series premiere, after a slew of brutal slayings, District 21, led by Sergeant Hank Voight (Jason Beghe) go after a Columbian drug cartel cleaning house in Chicago. They discover D’Anthony (guest star Isaac White) who proves to be an asset in the investigation. At District, complicated histories and unit rivalries surface which could end up costing them one of their own. Meanwhile, Rookie Kyle Ruzek (Patrick Flueger) is pulled from the police academy by Olinski (Elias Koteas) to join the team.
Antonio’s (Jon Seda) son was kidnapped and he has a feeling the Columbian drug gang is to blame. Pulpo (guest star Arturo Del Puerto), the Columbian gang leader, is being held in jail and suggests his release may trigger the release of Diego (guest star Zach Garcia). During the investigation, Halstead (Jesse Lee Soffer) learns some new information about Lindsay (Sophia Bush).