Chicago P.D.

Sgt. Hank Voight leads the Intelligence Unit in taking down a Colombian drug ring responsible for the ruthless murders of various dealers and the distribution of tainted drugs.

The Intelligence Unit reel from losing one of their own while helping Antonio rescue his son from the Colombians.

The Intelligence Unit unravel a gun smuggling operation involving high caliber bullets. Voight seeks to get a young boy out of the gang. Halstead's temper implodes upon coming across an adversary from the past.

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 attempt to protect her and as Voight's 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. Sergeant Platt sends Atwater and Burgess to arrest a hoarder where they discover more than just clutter.

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 drug smuggling operation which has put several girl's lives in peril. Voight's overprotective act with Lindsay leads her right where he doesn't want as she also helps to keep Justin out of trouble. Meanwhile on stakeout, things get tense between Olinsky and Ruzek as Olinski tries to teach him the finer points of surveillance.

New York's SVU detectives Fin and Rollins help track down a serial killer who rapes his victims.

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 Affairs and Voight which increases friction between Voight and Antonio. Back at the precinct Ruzek helps Burgess get back at desk sergeant Platt.

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 daughter, Voight takes the case from the Gang Unit. Ruzek pulls up Burgess to help with an undercover mission that he hopes will help solve the case.

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 instrumental in putting away high profile criminals. With Intelligence down one, Sumner is given an opportunity to prove herself. Meanwhile, Lindsay and Severide share a moment.

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 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. Meanwhile, a softer light is cast on Platt when she enlists the help of Ruzek.

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 kidnapped one of their own and no love is lost between sides. Meanwhile, Ruzek gets some difficult news as a blast from Lindsay's past comes back, giving us a glimpse at where she came from. Voight reminds her that she's come too far to screw it up. At the same time we learn something about Jin that is bound to be a problem.

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 possible to keep him in the clear. At the same time with Charlie back in town Lindsay realizes she's going to have to come clean about a few things. Halstead finally gets answers he's been wanting about Voight's and Olinsky's past.

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 Voight for help. Meanwhile Jin is confronted about his secret meetings with Stillwell. It all comes to a head in the season finale.

Still reeling from the death of informant Anna, Voight faces a new threat as he tries to keep the neighborhood clean. New wrinkles develop in the Upton, Halstead and Voight dynamic. The team gets a new chief.

When a convicted murderer hijacks a prison van, the team scrambles to find him and the abducted prison guard before it's too late. Burgess questions Ruzek's motives in a case, creating tension between the two.

The team investigates a string of brutal pharmacy robberies and Halsted connects with one of the victims about their Army careers. Upton suspects there is more to the story and confides in Voight.

A shocking murder pulls rookie officer Dante Torres into his own neighborhood. Voight and Atwater help him navigate the case and manage tricky personal dynamics with his wary neighbors. Torres realizes his life may change forever.

Upton's dogged pursuit of a missing teenage girl leads the team into a dark web of human trafficking. Chief O'Neil becomes involved with the unit's investigation when it becomes evident his son, Sean, has a connection to the missing girl.

Chicago finest will bring down the police chief's son as they put an end to the sex trafficking operation.

When actionable evidence finally surfaces against Sean O'Neal, Upton and the team work relentlessly to build a case in secret; they discover Sean is more elusive and dangerous than anticipated.

Chief O'Neal diverts Voight's team to a trivial "dead fish" case, hoping to distract from his son's investigation. The fish case grows complicated, triggering difficult memories for Burgess.

After a shocking discovery, the team begins closing in on Sean O'Neal with every shred of evidence they can find. Determined to keep his son out of prison, Chief O'Neal hires a lawyer.

A series of brutal home invasion robberies finds the team paired with Det. Borkowski, an old friend of Ruzek's, to work the case. Things get complicated for Torres when it becomes clear Borkowski has a vastly different policing style.

A shocking ambush at a funeral leads the team into a investigation to find the shooters. Much to Atwater's surprise, he must rely on someone from his past to help in the investigation, dredging up old memories and revealing new truths.

Sean O'Neal surprises Upton with a call from prison, revealing sensitive information; however, she grapples with how to keep him at a distance. The team mobilizes to stop a crime in progress before it is too late.

State's Attorney Nina Chapman pursue a drug runner who dodged prison years ago after Chapman's informant disappeared. Voight uncovers a damaging secret from Chapman's past threatening the investigation and Chapman's career.

After a brutal shooting Burgess and Ruzek find themselves trapped aboard the busy subway train. They piece together scant evidence and drawn into a dark family drama. Burgess' proximity to the shooting triggers harsh memories.

When a family is poisoned in their home, the team discovers a connection to the Becks. Ruzek goes undercover to work for their business and as he gets closer to Samantha, chilling information about her father, Richard, comes to light.

Voight takes the stand in a high-stakes murder trial against notorious drug kingpin Arturo Morales. when it becomes clear that Morales and his henchmen have compromised a juror, Voight and the team work furiously to ensure justice prevails

As the team investigates a convenience store robbery, the evidence leads them to an unusual pair of suspects, revealing a dark personal drama and another potential victim; Burgess slowly makes strides tackling her past trauma.

A tragic crime Leads the Intelligence Team closer to the Beck family.

Atwater's worlds collide when there's a shooting at the building he owns in Burnside, which leaves a child dead. Atwater must confront his relationship with his father, Lew, as the brutal case forces them together.

Upton is unwittingly drawn into a deadly betrayal and finds herself in a fight for her life. With minimal leads, Voight and the team scramble to find her before it's too late.

Torres finds himself in the midst of a murder case that hits close to home and threatens to expose his troubled past. As he struggles to reconcile his old life with his new one, Voight keeps a watchful eye.

The team scrambles to get ahead of Richard Beck's attack.

Tasked with shadowing a crisis prevention team, Upton finds her approach to policing at odds with the team's mental health clinician. Voight stands by Upton as she continues to struggle in her personal life.

Despite being on leave, Ruzek gets mixed up in a case after a late-night poker game is robbed.

Burgess works an extra shift and gets caught in the middle of a drive-by attack on refugees; the team works together to track down the shooter and uncover the true motive behind the attack.

Torres comes back from furlough and goes undercover in a tense drug trafficking case.

Atwater turns to an unlikely source of support when a string of jewellery store robberies shakes his confidence.

Intelligence teams up with ASA Chapman to take on an abduction case involving a teenager. The case hits close to home for Voight, leading him to take a personal interest in finding justice for the victim.

An ongoing case hits close to home for Voight as Intelligence teams up with an SVU detective to track down a prolific offender.

Upton brings SVU detective Petrovic in to help with the case of a tender-age kidnapping.

Torres' personal involvement with an informant jeopardizes his safety and threatens to expose an undercover operation.

Upton becomes consumed with an almost decade old missing persons case linked to Petrovic after a young child shows up at the District seeking help.

As Atwater finds himself distracted by a past case, a CI from his past resurfaces with a tip on a string of armed robberies that are raising concerns.

Intelligence chases down a lead in the ongoing serial killer investigation as news of the case reaches the public.

As the months long investigation into the serial killer reaches its close, Voight must outsmart the offender in a race against the clock. Upton must make a vital decision.

A month after Voight's close brush with death, Intelligence is overwhelmed with cases as they catch a high-stakes drug bust.

After tragedy strikes Intelligence, the unit must persevere during an adrenalized manhunt across the city.

Atwater struggles to find balance as he teams up with a forensic psychologist on an armed robbery case

A serial rapist reemerges that eluded Voight 15 years earlier.

In the midst of a momentous rainstorm, Intelligence lends support to Officer Cook when she and her partner disagree about an investigation.

Burgess is put to the test as she looks to make an advancement in her career.

Torres is haunted by his previous transgressions as Cook takes on a tense undercover assignment.

The unit learns the truth about a secret Torres has been keeping, as Deputy Chief Charlie Reid puts a focus on Intelligence.

Cook turns to her family when Intelligence faces administrative roadblocks that threaten a kidnapping investigation.

An unexpected visitor causes disruption for Ruzek and Burgess amidst an emotional investigation involving an unidentified young girl.

With the suspects still at large and conditions worsening underground, first responders race against the clock to reach the trapped victims, while the investigation into the assailants comes into focus.

Intelligence makes a gruesome discovery that leads Torres to go undercover at the juvenile detention center where he served time as a teen.

A mounting street war threatens a community-center project that Atwater is trying to get off the ground.

Ruzek grapples with his father's worsening condition while Intelligence searches for an elusive serial killer.

Voight questions Deputy Chief Reid's motives in enacting a Violence Reduction Initiative across a neighborhood where numerous gangs are fighting for territory.

Burgess' memory recall is put to the test following a deadly incident at her local diner.

The search for the suspect in a shooting uncovers a surprising personal connection to Atwater and Val, raising questions about their relationship status.

Voight and Chapman work together to uncover Deputy Chief Reid's shadow dealings as Reid assigns Intelligence to a carjacking case.

Cook works with a confidential informant for the first time in a robbery-murder case with links to a star college athlete.

Ruzek witnesses a tragic accident on an icy bridge, leading Intelligence into a dark, sinister case involving sex trafficking.

Intelligence ups their pursuit of Deputy Chief Reid. As things escalate and Reid shows himself to be a formidable opponent, Voight finds himself battling his own instincts.

Ruzek and Burgess's wedding day arrives. Chapman grows closer to Voight, and Torres faces the emotional fall out of his actions.

Voight teams up with an unlikely ally to take a killer off the streets while fighting to bring his Intelligence unit back together.

The Intelligence Unit is in a race against time when a man from Torres' neighborhood is violently abducted.

A murder near Burgess and Ruzek's neighborhood leads the team to probe complex relationships in their close community.

A string of violent robberies across the city digs up one family's secrets; a surprising detail of Voight's past resurfaces.

After a bombing in downtown Chicago, Atwater meets up with a former friend from his academy days.

Torres is dragged into a deadly conspiracy when a routine assignment takes a violent turn.

When a violent break-in occurs, Voight's suspicions lead the team back to a disturbing figure from a past investigation.

Voight and the team race to solve the Bell case to prevent further deaths.

Platt faces trouble after a basic favor for an ex-recruit turns into a catastrophic situation.

Torres probes the Morgan case conspiracy, pulling Intelligence into a complex maze of hidden truths.

Kevin goes undercover to investigate the world of car jacking.

Details about Imani's past emerge as the Intelligence Unit seeks the truth behind the sudden resurfacing of a decades-old missing child case.d

An airport crisis reveals a larger conspiracy tied to a passenger jet, launching the Intelligence Unit into a dangerous chase for the suspect while the FBI watches closely.

Burgess mentors a new officer while the team works on a dangerous drug investigation.

Ruzek becomes suspicious after a DEA agent reaches out to him asking about a missing informant.

Torres works to end a revenge killing cycle after a teen's death.

Tensions between Voight and Imani begin to form when a series of ATM robberies hits the city.

A fatal house party prompts the Intelligence Unit to discover a family's disturbing secret. Atwater reaches a crucial personal crossroads.

Ruzek examines a VHS tape from his father's possessions, leading to unforeseen results.

Imani struggles to maintain her composure when a new lead reignites her investigation into her sister's disappearance.

When a key witness refuses to cooperate, the Intelligence Unit is forced to rethink their strategy to locate a fleeing suspect. Imani must confront her past before it's too late.

Sergeant Voight tries to find out who is behind the murder of Jin, and come up with the unbelievable discovery and learned that Sergeant Edwin Stillwell playing a double game with the intention of getting out on the surface of the big fish along with Voight.

A string of identical murders becomes personal when Voight's friend falls victim to the gunman.

The bounty on Halstead's head becomes a serious reality as an innocent bartender takes a bullet meant for him. Olinsky tries to reason with Bembenek to call off the hit, to no avail. Voight and the team keep this investigation in-house to find the hired assassin. Meanwhile, after a tense interaction at district Platt and Nadia come to an understanding.

A clue leading Intelligence to the whereabouts of two missing teenage girls comes from an unlikely source close to the victim.

Voight is attacked and abducted while trying to help his son's girlfriend.

The murder of a ten-year-old witness sends Atwater and Ruzek undercover as inmates in a federal prison.

The Chicago Intelligence Unit continues working with Special Victims Unit to take down a child pornography ring.

Antonio gets caught off guard in fellow police officer Roman's security company, and word from above is he will lose his job if the case isn't solved in two days. The unit comes together to try to solve the case and save their brother cop Antonio.

A huge drug bust puts Olinsky's family in danger. Meanwhile, the team digs up a common thread with the drug suspects, and Burgess and Roman are paired with a K-9 officer, who is Roman's former girlfriend.

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. Voight (Jason Beghe) informs Burgess of a new opportunity that this affords her.

Lindsay calls on Voight and his unit for help with her first case on the federal task force; Burgess is relegated to desk duty.

Complicated clues surround the murder of a mother and her daughter. While, Lindsay prepares for an undercover investigation in Bolivia, and it dawns on Burgess and Roman that they need to put the past behind them.

Antonio and his sister talk to Adrian Gish about the person they think is responsible for the fire that killed Shay; Lindsay has second thoughts about the task force; Platt's new, sunny demeanor results in curiosity.

Bunny comes to Lindsay 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 downloads their intel to the team, she also happens to be Antonio's former co-worker from Vice. Voight doesn't trust Bunny's motives for the tip.

After they are kidnapped while tackling a dangerous smuggling operation, Roman and Burgess pursue a man without calling for backup. Intelligence are spending the day receiving taser certification.

Antonio heads undercover with a dangerous robbery crew after a narcotics officer goes missing. Commander Fischer updates Voight on a missing officer that Narcotics had deep undercover with a robbery crew. Antonio connected with one of the crew members years ago, so he's asked to reestablish contact to help them find the officer. Meanwhile, Roman and Burgess are dealing with a squatter situation and they enlist Chicago Fire's Mouch to help.

The death of a protester at a world trade event seems to point to an Argentine official. Halstead's brother arrives in town and is soon stirring up trouble.

The investigation into a drug robbery gone wrong uncovers Voight's link to a missing teen; the real reason for Halstead's brother's visit becomes clear; and Platt cares for a young girl at district.

A case involving one of Chicago's most wanted fugitives hits close to home with Olinsky; an altercation with another officer lands Sean Roman in hot water; Platt helps Nadia prepare for her polygraph test.

Benson is in Chicago helping Intelligence with a rape/murder case similar to a case in New York from a decade ago, so she calls in Fin and Amaro for assistance.

Intelligence investigates the bombing of a trendy cafe and the district pays tribute to one of their own.

A mass shooting sends Intelligence racing to stop a group of highly motivated killers from striking again.

Voight comes up against a younger, more violent version of himself while trying to extract Commander Perry's nephew from a unit of corrupt officers.

Intelligence pursues a heroin kingpin who has a member of the team kidnapped.

Burgess and Roman find the body of an eight-year-old boy while pursuing a gang-banger.

A disgruntled father takes a member of Intelligence hostage in order to force the police to track down his missing daughter.

Voight and Olinsky hunt down a criminal they once put away.

When an undercover job goes south, Ruzek is investigated by a street deputy who will determine his future with the unit.

The discovery of a body leads to a cache of weapons, which then leads Intelligence on a strange investigation into a team of "operatives" that are targeting criminals within the city. Roman treats a sick young boy to a day at the 21st district.

Intelligence tries to find a missing teenage boy they believe could be a threat to the students at his wealthy school when they find disturbing drawings in his notebook.

The team discovers the mutilated body of a government official and learn that he had access to very important devices.

When a woman's head and decapitated body found in the Chicago River are connected to Voight's social group, Lindsay worries that his relationship with the group could affect his ability to see the case objectively.

A doctor from Voight's past is under investigation when four of his patients are sent to Chicago Med for an overdose of chemotherapy.

The team investigates the robbery of a luxury condo and Voight suspects that the family was knocked out by a powerful gas.

Voight enlists his former cell mate to help take down a major cocaine supplier, while Burgess makes a move regarding her relationship with Ruzek and Roman comes up with a plan to fund Platt and Mouch's wedding.

Lindsay goes undercover to find a rogue police officer who targets women at a local casino.

SVU detectives Olivia Benson and Odafin Tutuola come to Chicago to help find escaped killer Greg Yates.

A college professor is caught smuggling heroin to Canada.

The police investigate a boy's execution-style murder, which may be connected to another shooting. The incident also leads officers and members of the community to gather for a candlelight vigil.

Halstead and his co-workers get caught up in a violent shootout with bank robbers while on his off-duty job at the dispensary.

The team investigates a kidnapping at a secret shelter for battered women.

The team looks for a suspect who held a woman for months, physically abusing her and psychologically attempting to manipulate her into forgetting her identity.

Intelligence searches for the culprit who left a newborn baby in a duffel bag.

Burgess goes to court for shooting a 17-year-old honor student she suspects shot Roman.

The team investigates a pyramid scheme operation that may be linked to a brutal murder at a family residence.

A murder investigation becomes personal for Voight when his son Justin is attacked in the same manner as a widowed, single mother whose body is found in the trunk of her car.

Intelligence investigates a murder-arson case as Voight and Lindsay continue to deal with the aftermath of Justin's death.

Intelligence searches for the fiance of a man found badly beaten in the most dangerous neighborhood of District 21.

Platt and her father are brutally assaulted.

Intelligence investigates a shooting outside a concert that leads to a tangled web of gang-related violence.

Intelligence tracks down the people who have been dealing a drug that's been linked to several overdoses throughout Chicago.

A teenage girl is found dead in the home of a baseball player who's a friend of Olinsky's.

The only witness in the case against a suspected serial rapist is found murdered.

A highly trained killer declares war on the Chicago police department.

Kelly Severide of Firehouse 51 is brought to the District for questioning when his car is found to have caused a deadly crash, so the team tracks down a group of carjackers that may prove Severide's innocence.

When the body of a young woman is found, the Chicago police realize there's a serial killer at large after comparing her case with others.

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 runs Jimmy's DNA to confirm that he is actually Lindsay's father.

The investigation of a jogger's murder in the park is blocked by a church offering sanctuary to the prime suspects.

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 sends Halstead 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.

When a charred body is found in a torched house along with an injured boy, Intelligence works to find the cause.

Intelligence re-opens a case when a grieving father seeks to avenge his daughter's murder.

Intelligence works to find the arsonist behind a warehouse fire that left Olinsky's daughter fighting for her life.

A hiker leads intelligence to a woman being held hostage in the woods outside Chicago.

Intelligence investigates one of Chicago's wealthiest families when "Night Crawler" Bobby Trent is murdered.

Burgess's sister becomes a sexual assault victim after she's encouraged to spend a night out with friends.

Voight uncovers a connection between the murder of a teenage boy and a 17-year-old case.

Intelligence uncovers a surprising crew of suspects in a series of bank robberies.

Intelligence tracks down a group of vigilantes torturing and killing pedophiles.

Lindsay deals with the consequences of her actions when her mother is suspected of murder.

Intelligence attempts to bust a gun deal that results in innocent bystanders getting shot.

A Muslim patrol officer is suspected of causing a van to explode during a Chicago street festival when he goes missing and evidence points to his being involved.

A young Latina woman is brutally murdered and it's suspected she have been working as a drug mule until a different motive for her death is discovered.

While investigating a drug-related homicide, Intelligence is stonewalled by the 'no-snitch' culture of the neighborhood. And Atwater discovers a personal connection to the case. Meanwhile, the police's own code of silence is put to the test when Upton is asked about Ruzek's rough altercation with a suspect.

When Intelligence busts a meth lab run by gang leader Marshall Carter, they uncover a re-homing scam in which children adopted from foreign countries are abandoned, then sold online. Meanwhile, Atwater struggles with the difficult decision about whether to move his siblings Jordan and Vinessa to a safer environment outside of Chicago.

Upton must work with a Vice cop she dislikes to help Intelligence crack a drug-related murder.

In the wake of several gang-related child abductions, Intelligence must race against time to find a kidnapped boy. Owing to their swiftness and military precision, the team scours the VA records and tracks the suspects to a former Army Ranger. With his previous experience as a Ranger, Halstead convinces Voight to send him undercover to try and get information from inside.

A Congressman who's friends with Voight is found with a dead Ukrainian girl.

The death of Judge Tommy Wells' daughter puts Intelligence on the track of a pill mill spreading into the suburbs of Chicago and the doctor enabling it. Meanwhile, Voight discovers who's been leaking information from the 21st.

Halstead's partying with Camila unintentionally puts him in the middle of a drug-related homicide. He's forced to choose between loyalty to his unit and his girl. Meanwhile, Voight finally discovers the mole in his unit.

While trying to find the pimp, Intelligence stumbles on the women's shelter where he's scouting out girls. And Burgess moves the case forward with a series of confidential tips, but risks putting her informant in harm's way.

Atwater disappears at the house of a convicted felon and Intelligence tries to rescue him.

Intelligence works with a visiting detective to take down a gang from El Salvador that has infiltrated Chicago.

Intelligence investigates the murder of a basketball player following an anti-police rally and the case gets complicated when Woods' daughter gets involved.

Intelligence tracks down a vigilante killing rapists and Burgess questions whether the men who attacked her sister have really been punished.

Intelligence enlists Firehouse 51 to help prevent the latest in a series of bombings targeting the media.

A prominent Alderman known for his urban revitalization efforts is murdered; Olinsky receives an ultimatum from Woods.

Upton resumes an undercover identity to take down a meth ring run by a former criminal contact; Voight calls in a favor for Olinsky when pressure from Woods mounts.

A string of stash house robberies lead back to an unlikely individual; Voight confronts a key witness in the Bingham investigation.

When Voight witnesses the kidnapping of a woman who's somehow connected to his past, Intelligence searches for a connection between the kidnapping and bank robberies.

Halstead and Atwater go undercover to prevent military-grade weapons from hitting the street. Meanwhile, Voight calls in a favor as a last-ditch effort to clear Olinsky's name for Bingham's murder.

Intelligence seeks justice for Olinsky when he's stabbed in prison; Antonio's loyalty is tested; Woods looks to take down Voight once and for all.

With Voight suspended, Antonio takes charge of Intelligence to deal with overdoses of bad heroin, but Ruzek undermines his authority.

Intelligence hunts down the man responsible for the high-rise fire and the case gets personal for Halstead.

The team tries to rescue a teenage girl kidnapped by robbers; Voight and Platt attempt to clear Olinsky's name.

Burgess must choose between listening to Voight or potential new ally when a ride along goes sideways.

While undercover, Ruzek discovers his father is working for a suspected drug dealer and is forced to question if his dad is involved.

When an alderman's wife is beaten to death, Brennan pressures Voight to close the case; Upton shares a dark time from her past to get a confession.

Voight tells Halstead to remain impartial when the leader of a local mosque becomes a suspect in the bombing of an Army recruitment center.

While CPD tries to take down a drug kingpin, Atwater faces a tough choice.

Antonio crosses a line that puts the entire team at risk.

Voight and Ruzek lock horns over how to handle the aftermath of the Antonio situation. Meanwhile, a series of violent carjackings turns deadly, and Ruzek must rely on a C.I. he grew up with to help solve the case.

An investigation into the death of a well known district attorney puts the Intelligence Division at odds with a mayoral candidate. Antonio returns to work but doesn't trust his own judgment when an operation goes sideways.

While chasing a heroin supplier, CPD crosses paths with a convicted criminal recently released on a technicality. Halstead's history with the man threatens the team's ability to put him back in prison.

Atwater goes undercover to bring down the longtime head of a criminal enterprise and becomes entangled in a situation that tests his allegiances as well as his conscience.

Upton and Burgess find themselves in a difficult situation when Intelligence tracks a cache of cop killer machine guns to a local gun show in Wisconsin.

Using information from Cruz, Intelligence chases down the robbery crew that's been using the lockbox key. Voight is under pressure to bring the crew to justice without tarnishing the reputation of a murdered firefighter.

Voight and the Intelligence Unit focus all their effort and resources into investigating the disappearance of an exotic dancer who served as a long-time criminal informant for their team.

A mayoral candidate is shot by an unidentified sniper, and CPD races to catch the shooter before he can take out his next target.

With the threat of a gang war looming, Voight and Ray Price must organize a peace summit to end the bloodshed before more innocent people get hurt. Burgess evaluates her future with Blair.

Intelligence's investigation into the murder of Burgess' boyfriend threatens to reveal a dark side she was unaware of. The real motivation for his murder uncovers a much more unsettling truth.

A violent crew is hitting pharmaceutical delivery trucks and stealing drugs but their motivation is more complicated than just money. The case tests Upton and Ruzek's relationship.

Antonio struggles with his guilty conscience as he tries to take down a major drug dealer. In order to protect his team, Voight takes a big shot at Kelton.

With Kelton's election all but assured, Voight and his team must go off-book in a last-ditch effort to save Intelligence from getting axed.

When Kelton is found murdered, Voight's grudge against the mayor-elect puts him under suspicion; Upton and Halstead want to prove their sergeant's innocence, but the more evidence they gather, the closer they come to doing the opposite.

When Atwater goes undercover in a 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.

After a botched carjacking turns out to be something much bigger, Voight's unit goes toe-to-toe with a smart drug kingpin who only works with women. New recruit Vanessa Rojas struggles with the transition from undercover to Intelligence.

After zeroing in on a suspect responsible for bioterrorism, the P.D. prepares to undertake their biggest manhunt yet. Upton is torn between helping track down the perp and providing emotional support to a scared young girl who needs her..

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.

The shocking murder of young boys affects Halstead. Crawford encourages Intelligence to use a new facial recognition software to help identify a suspect, but the plan backfires.

Voight pulls Darius in after Crawford asks Intelligence to investigate a dangerous drug, but there is little trust in the relationship. When their plan to nail a dealer goes awry and another CI is murdered, the team must make a tough decision about Darius.

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 secret ongoing relationship with a woman connected to another case puts him in jeopardy. Fall Finale.

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.

After receiving a distressing 911 call, Burgess enlists the team's help to track down a girl caught up in a sex-trafficking ring.

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 searches for the dealer who caused multiple overdoses and is connected to Roman's missing sister. The case becomes a homicide investigation when they find the dealer's dead body.

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, but things get complicated when Rojas realizes someone she cares about might be involved.

The clock is on after Ruzek witnesses a woman's kidnapping and the team races to put the pieces together. Burgess tries to connect with Ruzek outside of work but he mysteriously distances himself from her.

Atwater goes undercover to take down a gun-trafficking ring, but discovers an officer from his past is undercover in the same organization.

The team responds to the shooting of a 5-year-old girl and they must work the case while facing new obstacles that come from the heightened attention on police reform. Atwater is targeted by a group of officers who want to hurt him for standing against the blue wall. Voight questions whether he's cut out for a new form of policing as he manages oversight from the CPD's deputy superintendent.

When the son of an influential former officer is implicated in a murder, Moore pressures Voight to charge him quickly. The stakes are raised in Atwater's fight against the blue wall after patrol officers stop responding to his teams calls.

Ruzek and Burgess discover a child walking alone in the middle of the street, and when they take her home, they discover that her entire family has been murdered; Upton is approached with a job offer from the FBI.

A cop is murdered, and suspicion falls on someone who has been holding a grudge against the officer. Intelligence works to solve the case, but Deputy Superintendent Samantha Miller's hesitant to defend him until she knows the whole story.

What starts off as a straight forward carjacking turns into something much more complicated.

After a seemingly innocent young man is gunned down in the street, the team works to bring the suspected culprit, but the case is more complex than it appears, the grief stricken father is determined to do his own undercover work.

The team goes under cover to bring down dangerous new drug dealers who are eliminating the competition. Ruzek's CI is a loose cannon and threatens the whole operation.

Ruzek and Atwater are tasked with arresting a fellow officer after a shooting. The situation turns dangerous when it's clear someone wants to assassinate the officer.

When a local business owner is gunned down in his shop, it becomes personal for Atwater, who patrolled the neighborhood as a young cop. Dep. Supt. Samantha Miller comes to Voight with a special request about Andre Cooper.

Ruzek's father, Bob, goes missing and the precinct has to find him before it's too late.

A wellness check on a family reveals signs of foul play and Upton is determined to find the parents and young daughter. As she delves further into the troubled family dynamics, she finds herself reflecting on her own childhood trauma.

The team pursues a crafty serial rapist. Sergeant Voight finds himself resisting some old, familiar tendencies in his quest for justice.

The shocking murder of a young pregnant woman leads the team on a desperate hunt for the killer, revealing something even darker than expected. Burgess has to make a tough decision about Makayla.

After a series of brutal home invasion robberies, Upton immerses herself in the case and finds herself caught between Voight and Halstead.

Voight and the team pursue a ruthless crime ring whose business has hit close to home. As they dig deeper, the extent of the danger becomes more apparent. Deputy Superintendent Samantha Miller second-guesses her decisions.

Voight and the team muster all their expertise to bring down a deadly crime ring. Burgess finds herself in a dangerous situation.

Burgess fights for her life. Dep. Supt. Sam Miller is desperate to find her son's killer. Voight and Upton deal with the aftermath of their deadly decision. Ruzek struggles with the pressure of the situation.

When a P.D. informant is murdered, the team digs in to track down the perpetrator only to learn a shocking truth. Voight and Ruzek strategize to help Burgess.

Halstead's past resurfaces when a former Army colleague is implicated in a deadly blast. As the FBI launches an investigation into Roy's disappearance, Upton feels the pressure of the secret she and Voight are sharing.

When Upton and Ruzek answer an emergency call to an abandoned house, their investigation leads them down a dark path. Upton feels the pressure of the secret she and Voight are sharing.

As the team works to solve a deadly shooting in Burnside, Atwater realizes he has a very personal connection to the case.

Ruzek reunites with an old colleague to take down a crime ring but when things don't add up, Voight and Burgess do some investigating of their own.

As the team works to bring down a drug ring, Voight builds trust with a new informant. However, it soon becomes clear she has a plan of her own.

The team investigates the stabbing of a father with two young daughters; they begin to suspect there is more to the story than meets the eye. The FBI investigation into Roy Walton's death intensifies.

With the FBI closing in on the Roy Walton investigation, Voight and Halstead strategize on a way out. After a city bus driver is shot by a passenger, the team investigates a possible abduction.

The team searches for a missing child in what turns out to be a very complicated case. Burgess and Ruzek are in for a shock when someone from Makayla's past comes forward.

Voight employs his new informant to help solve a tricky drug trafficking case. Atwater, who once again struggles to reconcile his personal and professional life, reaches a decision.

The team works together to identify the head of the brutal Los Temidos gang. Voight dives deeper into his informant Anna Avalos' past when her undercover role is threatened.

While out for a jog, Upton witnesses a horrible car crash and risks her own life to save the passengers. After learning more about the victims, the team must track down the man responsible for the brutal crash.

The team searches for a brutal killer with a signature modus operandi. Burgess and Ruzek double down in their fight to retain custody of Makayla.

The unit scrambles to search for one of its own who is in grave danger.

When a young man is shot outside the Cárabo Bakery, the team works to connect the shooting to bakery owner Javier Escano, who has been under surveillance. Despite the danger, Voight helps informant Anna Avalos get closer to their target.

Burgess and Ruzek deal with the aftermath of Makayla's abduction. Ruzek helps his former teacher find his daughter.

Halstead takes a new recruit under his wing during an investigation. The dynamics are challenging, however, and questions arise over the recruit's complicated past.

After the murder of a wealthy Chicago man, Atwater and the team dig in to uncover the truth, suspecting there is more to the story than meets the eye.

Voight and the Team delve into a cold case in search of clues to solve a shocking new crime. With its focus on buried memories, the case sparks concern for Burgess and Ruzek about Makayla's mental healing.

As the team closes in on drug kingpin Javier Escano, Voight is forced to lie to his undercover informant Anna to keep her on track. Their deteriorating trust threatens an increasingly tenuous operation.

After an explosion rocks the case, the team scrambles to finally take down Escano as everyone nears their breaking point.