List of Chicago P.D. characters


This is a list of fictional characters in the television series Chicago P.D. The article deals with the series' main, recurring, and minor characters.

Main characters

Hank Voight

Antonio Dawson

Erin Lindsay

Jay Halstead

Detective Jay Halstead previously appeared on Chicago Fire as an undercover cop assigned to shadow and take down a local mobster-cum-thug who was harassing Gabriela Dawson, one of the owners of Molly's bar. He requests a transfer to the Intelligence Unit after the assignment ended with him getting shot but successfully arresting the mobster. Chicago P.D. begins a month following his transfer. Aside from the undercover assignment that served as a premise for his transfer to Intelligence, little is known about his early CPD career, except that he was already friends with Antonio Dawson prior to the transfer and that he had joined after serving in the military.
Halstead is the older brother of Will, an attending at the Chicago Medical Center and a main character in Chicago Med. Their mother had died of cancer and they had a very difficult relationship with their father Pat, who had initially disapproved of his sons not following the expected practice to immediately find work locally after high school; instead, both his sons left Chicago to find their own career paths, Will for medical school and Jay for the military. Will had moved to New York City for medical school and was overseas doing humanitarian work in Sudan but hit a rough patch when his relationship with a girl did not work out. Their mother's death was a sore point as Jay still harbors some lingering resentment over the fact that Will was not around during that time and "out partying". Otherwise, the brothers share a close relationship and look out for one another. The Halsteads are from a working class Irish Catholic background, based on the fact that both brothers attended Catholic school and Will's statements about being an altar boy and growing up in Canaryville, a historically Irish neighborhood in the South Side of Chicago. Jay once mentioned to his partner Erin Lindsay that their grandfather has a cabin in rural northern Wisconsin. He briefly referenced being ostracized by his more affluent counterparts at a private school and it is very likely that he went to De La Salle Institute with Will, who had also been bullied at school.
Halstead is a second-generation United States Army veteran and served with the 3rd Battalion, 75th Ranger Regiment. With the introduction of his friend Greg "Mouse" Gerwitz as a recurring character, Halstead's military past is gradually revealed. During one of their tours in Afghanistan they were both deployed to the notoriously hostile Korangal Valley and were in the lead Humvee of a convoy which was attacked, resulting in Mouse being given a medical discharge. His experience in Afghanistan was quite traumatic and he still exhibits symptoms of posttraumatic stress disorder, specifically insomnia, nightmares and flashbacks. With no familial support he had difficulty readjusting to civilian life when he first returned stateside and spent a period of time "doing nothing but drink, smoke, screw, fight". However, he remains mostly reticent about his time in the military, although cases involving veterans and children still affect him personally. After leaving the military, he joined the Chicago Police Department. His military background and training is apparent, despite having left the service for quite some time. For example, his apartment is spartan and well-kept and he is very physically fit, highly proficient in close quarters combat and able to maintain his concentration on a subject from behind a sniper rifle scope for long periods of time.
Halstead is known for his bluntness, especially when interrogating suspects. In season 1 he sometimes rubbed his superior Detective Sergeant Hank Voight the wrong way for questioning the latter's actions. Despite his calm and collected demeanor, he can be brash in making split-second decisions and has a temper. However, Voight retains him in the Intelligence Unit as he recognized Halstead's skill and dedication to the job. Voight initially treats Halstead as if he was there because he was friends with Dawson but by season 2, it is apparent that he trusts Halstead and regards him highly, as shown in the episode "Push the Pain Away" where he specifically requests for Halstead as the marksman to cover for him despite the heavy presence of specialist SWAT officers and in the season 5 episode "Reform" where he goes through great lengths to defend Halstead's innocence to an alderman. A highly skilled marksman Halstead is proficient with his standard issue Glock 17 and M4 firearms as well as a sniper rifle and has an extensive knowledge of ballistics and explosives. When a situation requires, he usually serves as the designated sniper to cover the rest of the unit.
Halstead has the tendency to blur the line separating his private and personal life, especially when people close to him are involved. For example, he conducts his own surveillance of Lonnie Rodiger, a young pedophile whom he correctly suspected of murdering young boys, including the younger brother of his high school girlfriend Allie. In the season 2 crossover with , when Will was called in for questioning by Sergeant Benson from the NYPD SVU and Voight as Will knew a victim, Halstead storms into Voight's office and tells them that they will get a written statement from Will and nothing more. Likewise, in season 6, he disobeyed Voight's order to stay on desk duty upon hearing that the fire his father died in was an arson and continued to pursue the case by himself.
In the pilot episode, it is established that Halstead had been partnered with Erin Lindsay for the past month and they share a close relationship, which has evolved into a more intimate relationship at various times but prevented from going any further due to Voight's dislike of "in-house romances". She tries to set him up on dates with her friends in the first several episodes of season 1 but soon realizes that she has feelings for him. He was presumably the first person Lindsay had confided her past to, in full detail. The two struck up a romantic relationship after Erin transfers to a federal task force, as they no longer had to worry about fraternization rules. After her return to the squad, their relationship cooled down on orders from Voight. When Lindsay spiralled out of control in the weeks following Nadia's death, he tried to help her, even after Voight had given up. She returns in the season 3 premiere after his cover was blown during an undercover operation to nab a drug kingpin. She rescues him in the nick of time and decides to return to Intelligence, where she is again partnered with Halstead. They reconnect and rekindle their relationship. In the episode "You Never Know Who's Who", they go public for the first time by openly kissing while hanging out at Molly's. They generally maintain a professional front when at work; Burgess once told Lindsay that she " sometimes that you and Jay are dating, 'cause you guys make it look so easy'". It is established in the season 4 episode "A Shot Heard Round the World" that they are now living together.
In episode "Remember the Devil" it was revealed that Halstead was married to a woman named Abby, whom he had met while deployed in Afghanistan and married in a drunken one-night stand. It causes a rift in his relationship with Lindsay and he moved out of their apartment at the end of the episode. At the end of the episode "Fork in the Road", he was seen making a call to Lindsay to propose to her but it was seen that she did not answer the call. It is later revealed that she was leaving for New York City after a series of incidents from the episode essentially led to her accepting a job there and escape further scrutiny from the CPD.
In season 5 premiere "Reform", he is partnered with Hailey Upton and their partnership continues to be rocky. He is a subject in an investigation and scrutiny from public when a drug deal went wrong. When a young girl was shot during the ordeal, later on showed that the bullet came from his gun.
In "Care Under Fire", it became known that he is still having nightmares about his tours in Afghanistan. He went undercover to infiltrate a kidnapping crew composed of military veterans and struck up a friendship with Luis Vega, his "target", due to their shared background as former Rangers who had been deployed to Afghanistan. When the target is killed, his flashbacks came up causing him to dangerously come close to shooting Upton. During the episode, he gets into a relationship with Camila Vega, Luis's sister. He continues to pose as Ryan and does not reveal his true identity to her.
In "Rabbit Hole", the relationship between Halstead and his new girlfriend Camila takes a dramatic turn when he unintentionally gets himself in the middle of a drug operation and a murder of an undercover DEA agent. He later finds out that Camila is a person of interest. But later in the investigation, she confesses that she was recruiting people to become drug dealers. When Voight sees that Halstead was acting strange, he asks him if he was in a relationship with her, he lied and denied it. But when the sting in getting the murderer to confess falls apart, his colleagues rushes in the garage and as she was getting arrested, she realizes that he was a cop. As she was sitting in a jail cell, Upton convinces Camila to not see Halstead again and to not speak of their relationship to anyone or face spending years in prison. In the following episode "Confidential", he was placed on desk duty by Voight and was ordered to see a psychiatrist. He eventually returned to the field and admitted to Upton in the episode "Chasing Monsters" that he found therapy helpful and was finally addressing his PTSD.
After a rocky start to his new partnership with Upton in season 5, the duo have since become close friends and confidants, often supporting one another after difficult cases.
In "Endings", after his father was declared brain dead, he investigated who the person responsible for the fire. During the investigation, it became known that Daniel Mendoza, a drug cartel member, was the one responsible. When attempting to take his brother Juan Mendoza, into custody, he almost gets into an altercation with him only for Upton and Ruzek to stop him. Voight benches Halstead due to his personal connection to the case. Jay is so enraged by this that he insults Upton's dad, saying she's projecting her own father issues. Upton, being tired of him using her as a punching bag, demanded to hand the keys to her. He calls Severide to give him a radio and a ride. He then takes a radio from a uniformed officer and chases after Daniel on foot, he was shot and wounded by Mendoza who was attempting to evade police. He, in return, shot and killed him. Voight berates him for going against his orders and that their conversation is not over.
In the season 6 episode "Trigger", he was visibly affected by the fact that a fellow veteran would frame a local imam and kill innocent people in a deluded quest to prove that the imam was financially supporting terrorist activity; for the first time on the show, Halstead spoke at length about his time in the military and commented that he had learned to live with his PTSD and move on with life, unlike the perpetrator.
In "Outrage", while working undercover in a drug bust, it went sideways when the team identified the suspect as Matthew Garrett, a perp who Halstead thought was in prison. Jay tried to bail before any trouble started, but Garrett had also recognize him and publicly called him out, leading to a brief confrontation. As he left the club, Jay described the guy as “the devil.” A paperwork SNAFU led to Garrett getting a huge payoff for wrongful arrest, and now he was using it to fund his drug operation. Halstead particularly hated him because Garrett killed a 17-year-old girl. With Halstead benched by Voight over an official complaint against him, they went ahead of the drug bust. Instead of Garrett, his two henchmen were there. Upon finding out the location, Halstead was the first person through the warehouse door and found Garrett shot in the neck. He died shortly thereafter, leaving Jay without the location of the murdered girl's body. When investigated by Internal Affairs, Voight instructed Halstead to lie and say Garrett died before he got there, instead of in front of him. Kelton along with everyone, was convinced that Halstead was the prime suspect in his murder. Voight goes to his old friend, former Detective Gus for answers, while there, he confesses to murder and tells to look the other way. When he couldn't, he gives him "some time alone" in which he committed suicide and Halstead was off the hook.

Crossovers

Halstead first appeared on Chicago Fire as a recurring character before becoming a main character on Chicago PD. Within the Chicago franchise, the character has crossed-over to Fire and Med as part of the CPD investigation. He also appeared on to assist with cross-jurisdiction cases.
The character was introduced in season 2 as a regular customer at Molly's, a bar jointly run by paramedic Gabriela Dawson and her firefighter colleagues. He had fallen for Gabby but she breaks up with him upon finding out he was a "henchman" of Arthur, a local thug who had threatened to burn down Molly's. Although her brother Antonio tells her that Halstead was actually a cop, Gabby decides to end their relationship, as she had felt betrayed even though she understood that Halstead could not blow his cover. They part on friendly terms after Halstead successfully arrests Arthur and taking a bullet to his shoulder in the process. As a result, he opts out of undercover work and joins Antonio in the Intelligence Unit.
Halstead also appeared in later in the season as the lead detective of a murder case involving Gabby's colleague at Firehouse 51. One of Lieutenant Severide's men Jeff Clarke was a suspect when the ex-lover of his wife was found dead. The ex-lover turned out to be a loanshark who repeatedly harassed the Clarkes to the point where Clarke has verbally threatened him and had gone to his house with a sniper rifle intending to kill him. Clarke, an Iraq veteran, later admitted that he tried to protect his wife because she had been there for him when he came home from his deployment, to which Halstead replied that he understood and could sympathize.
Halstead was a central character in the 2018 crossovers with Chicago Fire and Chicago Med. Firehouse 51 firefighters were called to the apartment building where his father Pat lives. Pat eventually died at Chicago Medical Center of complications from his injuries. Unlike Will, who had reconciled with their father in the Med episode "Generation Gap", Jay never did and only found out the truth after sifting through his father's belongings and finding a picture of him during his graduation from the CPD academy.
These are the medals fictionally worn by Halstead.

Adam Ruzek

Officer Adam Ruzek made his first appearance during the pilot episode "Stepping Stone", which was broadcast on January 8, 2014. Ruzek is a police officer in the intelligence unit of the Chicago Police Department. He has also made recurring appearances in Chicago Fire.
Ruzek's parents divorced when he was a child, and he would split time between his father in Beverly and mother in Canaryville. His father, Bob Ruzek, better known as "Disco Bob", is a longtime patrol officer with the 26th District who had served with both Voight and [|Olinsky]. Little is known about Ruzek's background as he rarely talks about his personal life. In season 5, he is blackmailed by Denny Woods into spying on the team in order to save himself and his sister from prison, and his nephew from going to foster care.
In the pilot episode, Ruzek was still in the academy and about to graduate when he was handpicked by [|Detective Alvin Olinsky] for an undercover assignment. The first season sees him trying to adjust to his new role in the intelligence unit. Although he was warmly welcomed by the team, his impulsive behavior has occasionally landed him into trouble with Voight and Olinsky and irked his more senior colleagues. His naiveté becomes apparent during his first stakeout, when he repeatedly looks at his phone and makes bathroom breaks. Olinsky temporarily had him transferred to uniformed patrol duty as a warning. Over time, he begins to settle in and becomes more mature and less impetuous. In the season 3 episode "Climbing into Bed", Ruzek has his badge temporarily revoked for going undercover without authorization. Platt reluctantly pulls some strings to lighten his punishment and Voight assures her that Ruzek was worth the risk. He strikes up a friendship with [|Officer Kevin Atwater], who transfers to Intelligence from patrol in season 2, and they often banter with one another.
In season 1, Ruzek was engaged to a woman named Wendy. They are shown to have a close and playful relationship, sending racy photos of each other back and forth. He tries to keep his professional and private lives separate but has difficulty doing so. He tells her that he was assigned to a desk job at district headquarters, which she eventually discovers is not true after he was shot. That relationship fell apart, partly due his job and partly to his growing infatuation with patrol officer [|Kim Burgess]. After Wendy calls off their engagement, Ruzek and Burgess pursue a romantic relationship. They share a playful relationship, with Ruzek often showing public displays of affection even at work. For example, he agrees to help her take "revenge" on Platt. He proposes to her in the season 2 finale and she happily accepts. It gradually becomes apparent to Burgess that Ruzek had commitment issues. She begins to doubt him after learning that he had an ex-fiancée before Wendy. At the end of "Looking Out for Stateville," she calls off the engagement in the same placed he proposed, leaving them both devastated. When Burgess and her partner Sean Roman appear to be flirting, he becomes jealous and their friendship becomes strained.
In season 3, it was revealed that Ruzek still loves Kim and wants nothing more than resume his relationship with her.
During a shootout with Jacob Sims, Adam is shot in the chest. The injury is not severe as his Kevlar vest deflected most of the shot.
In middle of season 4, Ruzek returns from an undercover job, hoping his job with intelligence is still open, but when he was gone his spot got taken by a guy named Kenny Rixton. Ruzek then talks to Voight about his old spot in Intelligence and if he can get it back. Voight cannot give Ruzek his old spot so he had to work in Uniform. Ruzek is cleaning his locker when Rixton tells him that he is transferring to a newly formed Narcotics unit. Ruzek then gets his job back in Intelligence, but does not get back together with Kim.
In the season 5 premiere "Reform", he appears to be more aggressive with the public, and when Atwater explains to him about the interactions between police and black men. He shrugged off by explain the problems with political correctness.
In "Snitch", his aggressive behavior takes a toll when he punches a suspect and Upton manages to get him out of the situation; he comes briefly under investigation by Internal Affairs but it is dropped when Upton convinces the mother of the suspect's child to get him to withdraw the complaint.
In "Fallen", Ruzek was recruited by Lieutenant Denny Woods, after Woods finds evidence that he deletes information that his sister was charged in a DUI while his nephew was sitting in the car with her. Woods uses it to blackmail Ruzek into getting incriminating evidence to take Voight down.
In "Care Under Fire", Ruzek uploads video of Halstead, while undercover, in a bar fight. He gives it to Woods during a disclosed meeting.
In "Monster", he gets Voight on video taking money from a crime scene without putting it into evidence. Ruzek intends to give it to Woods but when he meets with Woods, he refuses to give him the video because of loyalty towards Voight. Olinsky persuades Ruzek to go with him to meet a CI, but instead drives him to meet with Voight, who has discovered that Ruzek was the mole.
In "Rabbit Hole", Ruzek tries to explain the situation to Voight but is cut short. While Voight cannot do anything about the threatened charges against Ruzek, he conspires with Ruzek to take down Woods. When Ruzek meets with Woods, Woods shoves him onto the car, accusing him of undermining Wood's credibility, since the money actually was put into evidence by Voight, unknown to Ruzek. When this meeting was over, it was revealed Voight was there watching it go down.
At the end of "Confidential", after apologizing about the way he treated Burgess during his relationship with her, they end up having a one-night stand.
In "Homecoming", Ruzek found out that Olinsky had died from his injuries sustained from the stabbing; he supports Voight's actions by trying to block Antonio from intervening in Voight's beating of the killer. He is also present when Voight beats one of the co-conspirators to force him to give the name of who was in charge.
In "New Normal", with Voight suspended, Antonio was put in charge of the unit, Ruzek begins to butt heads with Dawson. Ruzek was getting in touch with Voight for assistance when the investigation into bad drugs was getting nowhere but dead bodies at every turn. He screams at Antonio for Voight not being there. Later, both Ruzek and Dawson have opposing views on good police work to the point of getting into a violent brawl in a dope lab.
In "Bad Boys", he starts a relationship with Hailey Upton, while keeping it a secret from others. In "Sacrifice", Upton ended the relationship with him citing their own careers.
In "Fathers and Sons", while Ruzek working undercover in an investigation of a drug dealing ring that involves the brutal death of a young drug mule, he finds out that his father, Disco Bob, is also involved. So the next morning he visits his father's house for a meeting of the minds. Bob says he's just “getting paid” and there's nothing else his son needs to know about, but wants his name kept out of the report. Upon this discovery, Upton demands that he either tells Voight about his father's involvement or she will. Ruzek chooses the first option and tries to convince Voight that his father is clean. Voight appears skeptical, telling his subordinate that they're going to follow the facts, no matter where that takes them. Bob accidentally stumbles into the drug deal, which incites a shootout that gets him wounded and blows everyone's cover. Ruzek visits his dad in the hospital and demands to know why he didn't get out when he was warned to. Bob admits that he took the Scorpion Club job because he's broke, thanks to “some bad investments.” He gets teary-eyed as he apologizes for messing up the case and wanting to try and help his son. Voight confirms that Bob was innocent and says that since he “was working undercover with us” to cover him.
In "Descent", after Voight and Ruzek capture Jason Rizzo, a drug dealer/rapist responsible for kidnapping Antonio's daughter, they let Antonio beat up the suspect to the point that he was pushed to his death. In "Brotherhood", upon learning of Antonio's addiction in "Descent", he covers for him at the same time when the OID was investigating about the events that transpired, infuriating Voight to point of almost getting into altercation with him. In "Reckoning", during a meeting with Platt, Voight, and Antonio, they learn that Internal Affairs had taken over the investigation. When he gets called in by Internal Affairs Detective David Heller, he sticks to his story of what had happened, despite the fact that the detective had already known that Antonio was responsible. He almost gets to altercation with Voight, with Voight citing that he is not Alvin Olinsky. At the end, Trudy walks into the unit, saying IAD is there to arrest Adam, but she will take him down to save him the scene, while everyone is opposed to the outcome. Adam appreciates them wanting to come down but doesn't want them to. Everyone is upset, but Antonio remains mum. Trudy walks Adam out, who touches the door; telling him to do more than keep his head down especially if he ends up in General Population, She tries to keep talking but Adam kisses her, saying he will be all right. Heller arrests him and escorts him into the car. Adam goes through the booking process as Antonio sits in the car, popping a pill. Adam sits in the holding cell as the barred door slams shut.
In "Doubt", Ruzek has been stripped of his police powers and he is awaiting trial. However, in "Assets", Ruzek's case was dismissed by a favor pulled by Voight, which grants Ruzek his position in Intelligence once again; this event fortifies his loyalty to the latter.

Crossovers

Detective Kevin Atwater is a police officer with the CPD's Intelligence Unit. He was previously a patrol officer at the 21st District.
Little is known about Atwater's background. His parents are either absent from his life or deceased and his younger siblings Jordan and Vanessa live with him as his "wards". His colleague Kim Burgess is one of his few colleagues whom they have regular contact with and it is implied that she has babysat Vanessa more than once. Like Joe Cruz from Chicago Fire, Atwater was raised in a gang-controlled neighborhood and had relatives and friends in prison but avoided a life of crime. He is known to the firefighters at 51 for throwing "great parties" and was once roped in to help organize a fundraiser at Molly's to help one of Lieutenant Severide's men.
During his time in patrol Atwater partnered with Burgess, who would later join him in Intelligence, and was usually the designated driver. Both Atwater and Burgess were constant targets of Desk Sergeant Platt's sarcasm. There was a running gag where Platt would assign them a different squad car if they talked back to her sarcastic remarks and mishaps would take place. In "Thirty Balloons", after going above and beyond in a hoarder deal, he and Burgess are given a new patrol car the district was given. They are told to keep it in mint condition since Commander Perry is going to drive it in a parade. However, when dealing with a drug mule, the mirror was wrecked when the drug mule tackled Atwater. He eventually uses an old connection from his neighborhood to fix the mirror in order to avoid Platt's wrath. They're able to keep it clean till the end of their shift until a construction worker drops a cinder block on the hood from 20 feet high while they're assisting on Intelligence's case.. Before he was permanently transferred to the Intelligence Unit, he worked undercover with Alvin Olinsky.
At the end of season one he was promoted to Hank Voight's Intelligence Unit. He is was partnered with rookie Adam Ruzek and they quickly become best friends. When Ruzek was engaged to Burgess, he asked Atwater to be his best man.
In "Prison Ball", he took a case personally when a 10-year-old girl was murdered by a suspect that she was supposed to be testifying against him. In the season 2 episode "There's My Girl", he is demoted back to being a uniformed officer following a suspect's suicide while in custody, when he left the soda can with the suspect in the interrogation room. In "Born into Bad News", after the Internal Affairs cleared him of the interrogation room incident, he is quickly promoted back to Intelligence.
In a Chicago Justice episode "Uncertainty Principle", when he goes to arrest the suspect for suspicions of drug dealing, he runs and Atwater gives chase and manages to arrest him, all of which is captured on video by some civilians. When the suspect later dies in jail, he was accused of killing him. Now-State Attorney Chief Investigator Dawson arrests him in the 21st District and Assistant State's Attorney Peter Stone was forced to file charges against him. During the investigation, it was found that he was killed in jail by another inmate and the charges were dropped. Peter Stone apologizes to him in court room for rushing to judgement.
In "Big Friends, Big Enemies", Burgess spots Atwater's younger brother, Jordan, while out visiting potential shooters and targets. Ever since, he keeps a close eye on him to see if he does not follow the wrong path.
In "Snitch", it is known that his little brother, Jordan, was born on October 18, 2002 when he, Burgess, and his friends were celebrating his 15th birthday and Atwater keeps a close relationship with the people in his community. During the investigation into the murder of a mini-mart owner, Roland, Atwater finds out that his brother was involved when he witnessed the murder and confronts him. He identified a gang banger named Curtis as the murder suspect and saw him throw the murder weapon in the nearby dumpster. Following a foot chase, Atwater eventually tracks down Curtis in an alley at gunpoint. Atwater encourages Curtis to go for his gun, which would give him a reason to shoot him, and Voight even suggests that Curtis could go for a second weapon on his ankle. But Atwater, in the end, does not pull the trigger and takes him in custody. In "Home", after his sister was attacked for the events that happened in "Snitch", he decides to let them move to Texas to ensure their safety. He still keeps in contact with them and misses them dearly.
In "Captive", in the middle of Trudy Platt's birthday karaoke party he receives a phone call in which prompts him to leave Molly's to check up on an anonymous person. Only to find out the person's house had been broken into, and another person holds Atwater at gunpoint and knocks him unconscious in which he ditches his badge. When Platt checks his phone, and gets the address of the tossed house, which is in the name of Joe Baker — a known drug dealer who has also gone missing. He was found chained to the ground in the abandoned church when Hailey finds a video on social media of Joe getting assaulted. When Atwater and Joe connect, it was revealed that seven years ago his son Ronnie Baker attempted to rob a store and murdered a clerk in the process after he gives chase and when he refuses to comply orders to surrender, he points his gun to Atwater, and he manages to shoot and kill him. Later found that Joe's sister Michelle had stayed in touch with him and told him to check on her brother. It was also revealed that the city of Chicago had paid Joe $20,000 in settlement which proves his doubt of Atwater's story. Atwater tearfully insists that he thinks about Joe's son every night before he goes to bed — but he also thinks about the clerk who Joe's son robbed, too. His captors were from a drug gang, Billy and Reimundo Morales who had accused them both of taking his drugs a few weeks earlier. And when Joe in revenge tries to his captors about his real identity, Atwater not only says he's a drug dealer, but claims he's the one who stole the cocaine to begin with. He ended up getting drilled in the leg by a power drill by Morales. Prior to the kidnapping, a girl named Elisa was brought in for questioning in which she confesses that she had drugged Joe and brought him to Morales. With one of the men shot dead by Antonio, Atwater manages to get himself and Joe to escape and eventually get into a fight with Morales for the gun. Joe comes to the rescue by shooting Morales with the service weapon he took off Atwater, that was knocked away in the fight. As soon as it over, Joe puts the gun to Atwater's head and demands to know the full story of his son's shooting. Atwater trying to convince Joe to put the gun down, because he sees the rest of Intelligence coming into the room, and did not want him to die, too. Joe drops the weapon and gets carried to the hospital. Atwater asks him to drug charges against him only to found out by Voight that Joe's friend Calvin Hill had stolen the drugs and set him up. Kevin tells Joe that his son's last words were about not getting on his knees for anyone, in which the same words that Joe put into his son's head. Atwater ends up consoling him.
In "Trigger", while working under undercover in the mosque to investigate a bombing at an Army's recruitment office, he was mistaken to be one of the combatants and was almost subjected to an enhanced interrogation not before Voight and FBI Agent William Graff stormed and Graff offering to apologize for his actions.
In "Night in Chicago", Atwater goes undercover and befriends a criminal named Daryl Ingram in order to take down the head of a criminal enterprise. While he and Daryl are in Daryl's car, they are pulled over by CPD Officers Tom Doyle and Jim Harper. During the stop, Doyle is overly aggressive with Atwater and Daryl, going as far saying racial slurs at them and drawing his gun, despite both of them being unarmed. They are arrested by the two officers on suspicion of robbery, but Daryl is shot and killed by Officer Doyle. Atwater is conflicted about what to say to Internal Affairs and the Civilian Office of Police Accountability, but it is revealed that Daryl did go for Officer Doyle's gun. Voight tells him to do what he thinks is right, as to remember that he gets paid to be a cop, not to change the world. It is revealed that Atwater told the Civilian Office of Police Accountability that it was a clean shooting, clearing Doyle. Atwater meets with Doyle in a bar with the intent to fight him, doing so. He and Doyle fight, and it ends with Atwater putting his gun against Doyle's head, doing what Doyle did to him at the traffic stop.
In "Silence of the Night", Atwater is forced to pair up with Doyle, who was promoted to detective in Area South since the events of "Night in Chicago" to bring down a biker who was selling guns. While coming from a gun deal, Doyle stops a black man who he believes to be carrying a suspicious bag, and pursues him into a building, resulting in the deaths of the man and Doyle at the hands of two gang members. Atwater becomes conflicted since Doyle had no probable cause to stop the man and the gang members in the building who shot Doyle shot him in self defense since he was waving his service weapon around. Atwater proceeds to report that Doyle had no probable cause to stop the man, holding the knowledge that a wrongful death lawsuit of the man Doyle pursued will be initiated, a deep Internal Affairs investigation on Atwater and Doyle will occur, the city being sued for millions, and the family of Doyle as well as fellow officers who were his friends heavily monitoring and threatening him. At the end of the episode, Voight tells Atwater that he and Intelligence will support Atwater's decision before Atwater heads home to find multiple officers staking out his house.

Crossovers

Sean Roman

Officer Sean Roman made his first appearance during the first episode of the second season "Call It Macaroni", which was broadcast on September 24, 2014. Roman is a police officer in the Chicago Police Department's 21st District. He has also made recurring appearances in Chicago Fire.
He is a brash patrol officer who partners with Burgess after transferring to the 2-1 from District 31. He transferred out because of his relationship with Jenn Cassidy, who is now a K-9 officer, to avoid breaking fraternization rules. He has his own private security company on the side.
Roman runs a security business and recruits cops who wish to earn extra money after hours. He offers Antonio a job as he knew the latter was going through a divorce and was mortgaging the house to pay for lawyer fees. In "Assignment of the Year", Roman did not know Asher was a felon, and his immaturity shows in his inexperience. Since Roman was heavily involved with the unit on this case, he had to cooperate with the unit in apprehending Asher's killer, which was Asher's own wife who seduced her errand boy, Terry, into committing the murder and allowing herself to escape prosecution.
In "Prison Ball", while he and Burgess unknowingly supervising three juvenile delinquents in the Police Explorers program, Al Olinsky bumps into them, Roman gives Olinsky attitude and he demands to know what Roman's problem is. It was revealed that years ago, while in District 31, in an undercover sting his partner and him were both shot and Olinsky was there. Roman's partner ended up being paralyzed because Olinsky did not help him and thought it was more important to chase after the shooter. While Roman is having a meltdown, he loses the Police Explorers. Burgess and Roman learn that the Explorers were actually juvenile delinquents, and they stole the commander's squad car.
In "Called in Dead", while Roman and his ex-girlfriend, Jenn Cassidy, now a K-9 officer, were arguing outside, Burgess gets shot investigating a call when she rang the doorbell, which was connected via trip wire to a shotgun.
In "Shouldn't Have Been Alone", upon investigation it was revealed that the house itself was booby-trapped by the murderer, Spencer York. During the investigation, Adam Ruzek and Roman got into a confrontation because Ruzek believes that it was Roman's fault that Burgess is in the hospital.
In "We Don't Work Together Anymore", while Burgess is on desk duty to take care of herself, Roman was partnered with Sergeant Platt.
In "What Do You Do", Burgess and Roman investigate a suspicious activity in a warehouse, which was later revealed to be a drug deal. Roman gained medical experience when he was forced at gunpoint to help a suspect that was shot and was in serious condition. Although Burgess was scared and Roman was seriously injured during the whole ordeal, they were eventually saved when Ruzek, while he and his unit were getting mandatory taser certification, noticed that Burgess had not responded to his messages.
In "The Three Gs", Roman gets into a physical altercation with a fellow officer, Officer DeLuca, while deciding on methods of how to save a girl's life, after she was shot by a stray bullet in the midst of the gunfight between the suspect with connections to the human trafficking case and Olinsky. Roman was suspended in the process when DeLuca decided to file a formal complaint against him but it was lifted when Hank Voight forced him to drop the complaint.
Roman's father is a Vietnam veteran who served in the 5th Marine Regiment.
In "There's My Girl", it was revealed that Sean has a cousin that works with the stone carving business when the department turns down an offer to carve a stone for Nadia.
In "Justice", he was shot in the patrol car alongside his partner, Kim Burgess. During a short foot pursuit, she was able to shoot the suspect.
In "She's Got Us", while waiting to be reinstated as a patrol officer, he learns that nerve damage to his left arm has ended his police career.
In "Start Digging", rather than take a desk job, he decides to go to San Diego and stay in his cousin's guest house. He wanted Burgess to come with him but she chose to stay. They shared their last kiss and Roman settled his feud with Adam Ruzek.

Crossovers

He has appeared on Chicago Fire to apprehend suspects.
Sheldon Jin was the Intelligence Unit's "tech wizard" and analyst. He is highly skilled in using technology to aid the investigations. He is the only member of the team who does not routinely carry a firearm or go out to the field and is usually in his office at the 21st District headquarters, only going to the crime scene when his expertise is needed.
Towards the end of season 1, it is revealed that an Voight's Internal Affairs handler Sergeant Edwin Stillwell has been blackmailing Jin into "spying" on the Intelligence Unit, particularly Voight. Jin's father had accumulated a large gambling debt and Stillwell threatened to deport his father back to China if he did not cooperate. Voight was initially furious upon finding out about Jin, although it lessens some after he discovers the link with IA, whom Voight had a history of bad blood with. He is killed by Stillwell in "A Beautiful Friendship" and found out by the Silos. Prior to his death, Jin mailed Halstead a thumbdrive with information incriminating Stillwell, leading to his arrest. Jin was honored with a plaque outside the 21st District headquarters.

Trudy Platt

Sergeant Trudy Platt is the desk sergeant at District 21. As the desk sergeant, she is the immediate superior of the district's patrol officers. She was previously a training officer and had passed the detective's exam twice but had to take a desk job after being shot. She is known for her sarcasm and deadpan humor. She sometimes comes off as cold and heartless, however, she deeply cares for the officers under her command and is shown to go to great lengths to defend them. This is greatly shown when an officer she assigned to guard duty is murdered execution-style by a criminal, she feels very guilty but is moved when many officers show up at the district to support the grieving family. At the beginning of season 1, she often tries to bully Officer Kim Burgess into running errands for her. When Burgess finally tells her off, Platt intentionally assigns Burgess and partner Kevin Atwater to a smelly squad car for the day. Burgess's new partner Sean Roman once called Platt a "pain in the ass".
In the episode "Turn the Light Off", it is revealed that Platt comes from a wealthy family. Her family disapproved of her decision to become a police officer. Every now and then, she would bring a "fiancé" to convince her father to continue subsidizing her lifestyle that exceeds her police officer salary. She convinces Adam Ruzek to play the fiancé and Ruzek takes the opportunity to eat at an expensive restaurant. She also has history with Voight and Olinsky; she once told Antonio that Voight is the best cop in the city, they hold a close working friendship, and despite Olinsky being her subordinate he is allowed to call her by her first name.
Platt meets firefighter Randy "Mouch" McHolland at Chief Boden's wedding at Firehouse 51 and strike up a friendship almost immediately. He eventually proposes marriage and Platt is sure her dad will spare no cost for his daughter's wedding. Their wedding plans are thrown off course when her father reveals that he was bankrupt due to bad deals and investments gone wrong, meaning that she would have to rely on her own finances. It is also implied that while Platt is financially independent, she has long relied on her family's money as back-up and now has to scale back her lifestyle due to her meager salary. They eventually marry in an intimate ceremony at Molly's in the Chicago Fire episode "On the Warpath" and had their honeymoon in 'God's Country', the Wisconsin Dells.
In "All Cylinders Firing", Trudy has dinner with her father at his house. Platt leaves the house so she can be back in time to meet her husband for end of shift and as she unlocks her car door, she is struck in the head and repeatedly beaten. The assailant escapes with her handgun, and neighbors realize she is lying on the ground, so they call 911 and she manages to tell them that the guy has her gun and she is a cop. Mouch arrives and he wants to know who did this to her. He cannot recall where she said she was going. They question him if it is possible that she was with another guy. She refers to her father as a "hardass" when she escorts the suspect's nephew on a date to meet with him. When Ruzek and Olinsky caught a break with regards to Platt's father, Robert Platt, they break down his door only to find him on the ground dead with multiple gunshot wounds. During the investigation, it was revealed that he was beat up in order to get information on Platt's whereabouts. It was revealed that his much younger girlfriend, Natalie, along with her boyfriend, Leonard, were in on a scam to steal his money. But she wanted Platt dead because she was suspicious of her and had her boyfriend commit the attack only to complicate it even further when she was not killed. When Burgess gives an update on her case, and asks Platt about the car, Trust lies by denying she knew whose car it was. The car belongs to Wade McGregor, who also worked for Platt's father. When Erin Lindsay arrives at the hospital with the file to find both Platt and her hospital detail officer gone. Lindsay calls Voight and tells him she's gone. Trudy arrives in her dad's office and gets a gun, after she grabs Wade McGregor's name off the Rolodex. She also smashes a display case and takes a golden shovel out of it. Platt now knows who they are after. Voight says we need to bring her in quietly, and they need to find both before someone gets killed. Wade McGregor is packed up and ready to go, when he turns around to see Trudy standing with her gun drawn. She picks up her other gun and says “Thanks”. She throws handcuffs at him. Platt brings McGregor to a vacant building, where she says she knows about him cutting corners on her dad's buildings and that he was selling cocaine and laundered proceeds to his job sites. He says her dad robbed him blind. Platt wants to know what her father's last words were, McGregor says he does not remember. She puts a rag in his mouth and duct tapes it shut. The next thing we see is Platt cleaning up in the bathroom, with her gun in her hand. She comes out to Voight telling her they need to talk. Voight yells back that she is not him. She breaks down in his arms and cries out that he killed her dad. At the end of the episode, Platt is back in the hospital resting and her husband, Mouch, is there.
In "Fagin", Hailey Upton asks if she had remember her but she did not remember. But later on, she remembers that on February 9, 2003 Platt answered a call at a diner, where a guy came in and pistol whipped the owner when he was closing up, almost killing himall for $272.57. Platt remembers she was working in the robbery/homicide department at the time.
In "Captive", it is implied that her birthday is on January 17 when her colleagues threw her a karaoke birthday party.
In "Profiles", while being interviewed on live TV by a news anchor, she was injured by a bombing in a TV studio that was later revealed, meant for the deceased anchor. She was later comforted by her husband, Mouch.

Crossovers

Platt also appears in Chicago Fire as a recurring character. She meets firefighter Randy "Mouch" McHolland in season 2 and they begin a relationship. Mouch has also appeared in Chicago P.D..
Detective Alvin Olinsky was a seasoned detective in the Intelligence Unit and Voight's most experienced team member. Before joining the force, Olinsky served in the United States Army and was at one time stationed in Vicenza, Italy with the 173rd Airborne Brigade Combat Team. Olinsky mentions in "Called in Dead" that he has 8 confirmed kills in the line of duty. He is one of two military veterans in the Intelligence Unit – the other being Jay Halstead, an Afghanistan veteran – and the duo sometimes exchange banter about each other's service.
In season 1, Olinsky becomes estranged from his wife, who made him move into the garage for some time, before husband and wife eventually reconciled and he is allowed to move back into the house. When Lexi is falsely accused of possessing marijuana, Olinsky is quick to help his daughter out. Even though she is suspended from school, the two have a father/daughter dance in the garage. When an ill-fated party ends in a gang member's shooting death, Lexi is the only witness. Olinsky tries to prevent Lexi from becoming a witness as it would endanger her life. However, when the shooter refuses to confess, Lexi volunteers. In the season 4 three-show crossover starting with the Chicago Fire episode "Deathtrap", Lexi is killed in a fire which the CFD later determined to be arson. In "Emotional Proximity", when the suspect is in custody, him along with Voight made up a lie on the police report that was stated that he had confessed to them. In Chicago Justice premiere "Fake", ASA Peter Stone rebutted that statement in court when Voight had to testify. The case was closed resulting in the arsonist being found guilty of first degree murder. Olinsky returns to work in the next episode.
In "You Never Know Who's Who", during the investigation in the murder of a former CIA agent, he worked undercover as a contact from CIA headquarters. He was shot and wounded when one of the suspect recognized that his identity was false. The suspect was later shot and killed by Antonio.
Olinsky has a long history with Voight having been partnered with him in a gang unit years earlier. Olinsky's partner was killed by a man named Browning and Olinsky and Voight "took him for a boat ride".
Although usually calm and reserved he has been shown to have a temper and is not above using questionable tactics to bring a suspect to justice.
Because Olinsky's desk is behind Halstead and Atwater, there is a running gag where Voight and the rest of the unit would miss him entering the room. Voight would brief the team and tell them to pass on the information to Olinsky "when he gets here", only for Olinsky to roll out on his chair and say "Here".
In "Breaking Point", he was taken into custody for questioning by Internal Affairs when his DNA came up on the body of Kevin Bingham, killer of Hank Voight's son Justin. When the detectives asked him about his DNA, he requested a lawyer. Lieutenant Denny Woods tries to get information from him in order to put Voight in jail, by offering him immunity. But he leaves his office, turning down the offer. With possibility that he might get arrested, he has a temptation to either betray Voight's loyalty or taking the deal.
In "Payback", he and Voight got tip on who the witness was following from Voight's favor to the Ivory Tower, a junkie named Ruben who tried to break into Olinsky's car a while back. He gives Voight the witness's address, and Voight telling him to not get involved. Voight asks Olinsky about his retirement papers being filed. Olinsky then claims he's not retiring; he just wants to use the paperwork as a flare to see if Internal Affairs will make a move. Voight then admits he's not going to be able to bend Ruben, because he's a recovering addict who is turning his life around. At the end, from an "anonymous" tip made to Narcotics, Ruben gets arrested with drugs that were planted on him by Olinsky. He maintained his innocence in front of his wife while Olinsky, watches from his car across the street thus damaging the witness's credibility. In "Saved", he revealed that the witness, Ruben, was later released due to lack of evidence. In "Allegiance", he was indicted by a grand jury for the murder of Kevin Bingham that was convened on "Saved" and was arrested by two Internal Affairs detectives in front of his fellow detectives. At the end, he was stabbed in prison by an inmate. In "Homecoming", he was soon discovered by corrections officers and rushed to the hospital but died as a result of his injuries. As the investigation into murder goes forward, it was revealed to be a hit by a drug runner for the Cali Cartel that Olinsky was trying to take down while he was in a DEA task force who arrested his brother. His brother ended up killed in prison, and a corrections officer that confided in him was also in on the hit.

Crossovers

Like many Chicago P.D. characters, Olinsky has appeared in Chicago Fire. He was the handler of Leon Cruz, younger brother of CFD firefighter Joe Cruz, and was assigned to make sure Leon, who was undercover in a gang, was safe. He also was a guest at Platt's and Mouch's wedding in "On the Warpath".
Detective Hailey Upton joined the Intelligence Unit from the Robbery-Homicide Division and later replaced Erin Lindsay following her departure for the FBI's Counter-terrorism Bureau in New York. As a young girl, her father, the owner of a diner, was attacked and robbed by an unknown shooter. After being threatened by the robber, Hailey spent the night at the desk of Trudy Platt when she was a detective in the Robbery-Homicide division. Platt made her feel safe as her father recovered from the attack and inspired Hailey to become a cop. It is revealed that she was meritoriously promoted to Detective after a year-long undercover assignment. She attended the University of Chicago. Hailey Upton has a history of dating her colleagues: Garrett Thomas, her sergeant that meritoriously promoted her to detective and Adam Ruzek.
In season 5, Upton is partnered with Jay Halstead. The partnership between the two was initially rocky during the first half of the season as Halstead had been getting over the departure of his ex-girlfriend and former partner Erin Lindsay. They gradually become good friends and confidants, indicated by the fact that it was to her that Halstead finally opened up about his PTSD.
In "Snitch", when she sees Ruzek assaulting a suspect in public, she manages to pull Ruzek aside and get him in the car. And when he was investigated by Internal Affair by what had happened, Ruzek accuses her of going to Internal Affairs, it was later revealed she manages to convince the suspect's child mother to have him drop the charges.
In "Fallen", she was partnered with Vice Sergeant Sean McGrady, who has problems with her. During the search of Quinton Kane, a drug dealer with a likely connection to the murder of a family, he returns to help with the investigation. But when Upton goes to meet with McGrady, he ends up dead and Voight chastizes Upton for letting McGrady come to the scene alone. She's thrown, explaining that she had told him to wait for her and that she was actually ten minutes ahead of the time they had planned to meet, but Voight blows her off. As a result, the officers including his former partner and the McGrady's widow and family ending up turning their backs on her. During the investigation, Upton calls for a private meeting with Voight and shows him a sign-in sheet with McGrady's signature that proves McGrady was in Chicago PD's lab, where a vial of Quinton Kane's blood was kept but is now missing. Upton believes McGrady framed Kane for murder when he actually killed himself to escape his mounting debt. Voight apologizes and then tells her that if she come forward with the truth, and asks her if she wants to tarnish McGrady's legacy and ruin his family over the “jackass” that was a suspect in the family's murder. So, she agrees to stay quiet about what had actually happened. In "Confidential", she and Burgess butts heads about how to handle confidential informants when Burgess's confidential information informs them about a dead body, in which Burgess does not believe but Upton decides to investigate. It turns out that she was right and it leads to an sex trafficking, and the informant comes up dead. Upton goes to her CI and she does not push the informant further citing that the informant has a family. Burgess had a problem with how she handled the situation.
In "Ghosts", when a drug bust goes awry, she recognizes that one of the victims was someone that she knows from her undercover assignment prior to joining Intelligence. She suspects that the man she was undercover busting, Ron Booth, is back in business. He immediately becomes the prime suspect and Upton suggests that she goes back undercover to get into his warehouse. Booth still knows her as an Iowa girl named "Kelly". It turned personal when she also suspects that he killed her former partner. It was revealed that while working undercover on the night of New Year's Eve, at a party that Booth hosted, he drunkenly tried to rape her. She got away from him before he could, and her former partner got her to the hospital. He then got obsessive over her when he asks "Ryan" that if he slept with her and cuts ties with him. When Voight tells her to stop the investigation, she disobeyed his orders and agrees to meet with him without Halstead knowing. After the meeting, Halstead confronts her for being "too emotional" with this case. During the meeting with Booth at a parking lot, he checks Upton to see if she was wearing a wire but instead groping her. Booth's nephew got nervous when Halstead starts to make his move and draws his gun, but gets shot dead by Halstead. With the chaos, Booth runs to the stairwell with Upton giving chase and the two end up fighting to gain control. Upton ends up getting the other hand, and beats Booth, and demands that he admit to the murder of her former partner. He does not, so she contemplates shooting him before Halstead arrives to stop her. At the end of the episode, Halstead goes to Upton's apartment to console her.
In "Bad Boys", she and Ruzek begin a relationship but keep it secret from the other members in Intelligence. They make their relationship public in "True or False" when Voight finds out after they responded to an early morning call together. They break up in "Sacrifice" due to their careers.
In "Informant", her informant is murdered in front of her and it is implied that Voight's CI Darius Walker murdered him to avoid being identified as a confidential informant after accidentally being spotted by Upton's informant. Upton proceeds to avenge his death after implying Walker was the one responsible for setting up the deaths of gang members and cops in a drug deal while asking questions about said crime.
In "Lines", Upton is assigned to fill in at the FBI's New York Office by Voight as punishment for planting drugs in a drug lord's car to protect Rojas and ensure that Rojas's friend receives a deal for his participation.

Crossovers

Officer Vanessa Rojas is an officer who joined the Intelligence Unit from a long-term investigations unit and later replaced Antonio Dawson following his resignation from the Chicago Police Department and relocation to Puerto Rico. She makes her debut in "Assets" as Nina Rodriguez, a bartender for one of Darius Walker's bar that Kevin Atwater and the Intelligence have infiltrated. When Atwater tries to set up a deal with her, it is later revealed that she's a CPD officer working in an undercover operations unit. She is assigned to Intelligence in "Familia", where she gets off to a rocky start after her pursuit of a carjacker on her first day ends in the carjacker's death and Intelligence assigned the case, much to Voight's dismay.
It is revealed that she lived in 32 different foster homes growing up and that she was homeless at the time when she joined Intelligence, having been living out of her car and her undercover apartment. With her undercover assignment over, she no longer had a place to stay but was hesitant to ask for help. Hailey Upton noticed and offered her extra room. They have been housemates ever since.

Recurring

Family members

''Chicago Fire''