List of ''Chicago P.D.'' characters

Hank Voight

Antonio Dawson

Erin Lindsay

Jay Halstead

Detective Jay Halstead previously appeared on Chicago Fire as an undercover cop assigned to take down a local mobster-cum-thug. 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^[4] brother of Will, an attending at the (fictional) Chicago Medical Center and a main character in Chicago Med. Their mother had died of cancer^[5] and they had a very difficult relationship with their father Pat,^[2][6] 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.^[7] 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" (presumably to get over his ex-girlfriend). Otherwise, the brothers share a close relationship and look out for one another. The Halsteads are from a working class^[6] Irish Catholic background, based on the fact that both brothers attended Catholic school^[8][9] and Will's statements about being an altar boy and growing up in Canaryville, a historically Irish neighborhood in the South Side of Chicago.^[9][10] Jay once mentioned to his partner Erin Lindsay that their grandfather has a cabin in rural northern Wisconsin.^[11] He briefly referenced being ostracized by his more affluent counterparts at a private school^[12] and it is very likely that he went to De La Salle Institute with Will, who had also been bullied at school (although for his academic prowess).^[13]

Halstead is a United States Army veteran and served with the 3rd Battalion, 75th Ranger Regiment.^[14][15] 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^{[15][16][17][18]} and were in the lead Humvee of a convoy which was attacked, resulting in Mouse being given a medical discharge.^[19] His experience in Afghanistan was quite traumatic^{[20][15][16][21]} and he still exhibits symptoms of posttraumatic stress disorder, specifically insomnia, nightmares and flashbacks.^[18] 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".^[18][22] However, he remains mostly reticent about his time in the military.^[2][23][17] 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^[24] 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.^[25][15] 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. A highly skilled marksman Halstead is proficient with his standard issue Glock 17 and M4 firearms as well as a sniper rifle^{[26][27][28][29]} and has an extensive knowledge of ballistics and explosives.^[30] When a situation requires, he (or sometimes with Olinsky, who is also a military veteran) 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 Law & Order: Special Victims Unit, 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.

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 (which they have had to keep secret) 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.^[31][32] 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.^[24] They generally maintain a professional front when at work; Burgess once told Lindsay that she "[forgets] sometimes that you and Jay are dating, 'cause you guys make it look so easy."^[33] It is established in the season 4 episode "A Shot Heard Round the World" that they are now living together.^[30]

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.^[22] 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 didn't 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 (and eventually died at Chicago Med), 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.^[18]

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 funny, 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.

Awards and decorations

These are the medals fictionally worn by Halstead.^[15]

Personal decorations Army Achievement Medal, w/1 bronze oak leaf cluster (2nd award) Unit awards Presidential Unit Citation, w/2 bronze oak leaf clusters (3rd award) Valorous Unit Award, w/3 bronze oak leaf clusters (4th award) Service Awards Army Good Conduct Medal Campaign and service medals National Defense Service Medal Afghanistan Campaign Medal, w/1 bronze service star (2nd award) Global War on Terrorism Expeditionary Medal Global War on Terrorism Service Medal Service and training awards Army Service Ribbon Overseas Service Ribbon

Other accoutrements Combat Infantryman Badge Parachutist Badge Army Expert Marksmanship Badge 75th Ranger Regiment Combat Service Identification Badge Ranger tab

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 (Jack Coleman), better known as "Disco Bob", is a longtime patrol officer with the 26th District who had served with both Voight and Olinsky.^[32] Little is known about Ruzek's background as he rarely talks about his personal life and has made no mentions of any siblings, implying that he may be an only child.

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.^[35] 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 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.^[36] That relationship fell apart, partially due his job and partially to his growing infatuation with patrol officer Kim Burgess. After Wendy calls off their engagement, Ruzek and Burgess pursue a romantic relationship.^[37] 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.^[38] 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.^[33]

In Season three, 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 can't give Ruzek his old spot so he had to work in Uniform. Ruzek is cleaning his locker when Rixton tells him that he is going back to Afghanistan. Ruzek then gets his job back in intelligence, but doesn't 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 and he was briefly under investigation by Internal Affairs but it was dropped when Upton convinces the mother of his child to get him to withdraw the complaint.

In "Fallen", he 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 and uses it to blackmail him, to get incriminating evidence to take Voight down.

In "Care Under Fire", he uploads the video of Halstead, while undercover, in a bar fight on his flash drive and 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 and was about to give it to Woods but when he meets with Woods, he refuses to give him the video because of loyalty towards Voight. Olinsky gets Ruzek with him to take him to meet his "CI" but instead meets with Voight, discovering that he was the mole.

In "Rabbit Hole", he tries to explain the situation to Voight but he cut it short. While he can't do nothing about the charges against him, Voight conspires with him to take down Woods. When Woods meets him, he shoves him on the car accusing him of undermining his credibility, with the video and the money actually was put into evidence. With the 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 during his relationship with Burgess, they end up having a one night stand.

In "Homecoming", when he had found out that Olinsky had died from his injuries that was sustained from the stabbing, he had supported Voight's actions when he tried to block Antonio from intervening Voight's beating of the killer. And to the point that he was present when Voight had beaten one of the co-conspirator in order for him to give the name of who was in charge. While Antonio was skeptical of what had happened on the roof between Voight and Carlos DeLeon, he didn't care since the man involved killed Olinsky, he almost gets into a fight with him.

Kevin Atwater

Officer Kevin Atwater is a former patrol officer for the CPD. He was partners with Officer Kim Burgess. Atwater takes pride in his job as a patrol officer. Usually, he is the driver of a squad car in a "partnership arrangement". Before he was permanently transferred to the Intelligence Unit, he worked undercover with Alvin Olinsky.^[35]

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". 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 gangster-infested neighborhood and had relatives and friends in prison but managed to avoid following them into a life of crime.^[39] 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.^[40]

Both Atwater and Burgess are constant targets of Desk Sergeant Platt's sarcasm. However, they are generally able to laugh it off after shift. 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. Atwater uses an old connection from his neighborhood to fix the mirror.^[38]

At the end of season one he is promoted to Hank Voight's Intelligence unit.

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.^[39]

In "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.^[8]

In "Born into Bad News", after the Internal Affairs cleared him of the interrogation room incident, he is quickly promoted back to Intelligence.

In an 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. Detective 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 was 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 doesn't 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 "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 hours, which is in the name of Joe Baker — a known drug dealer who has also missing. He was found chained to the ground in the abandoned church when Haley 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.

Kim Burgess

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.^[27] 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 didn't 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 his own wife seduced her errand boy, Terry, in committing the murder and allowing herself to escape prosecution.^[41]

In "Prison Ball", while he and Burgess unknowingly supervising three juvenile delinquents in the Police Explorers program, 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 bled out and died because Olinsky didn't 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.^[39]

In "Called in Dead", when Roman and his ex-girlfriend, Jenn Cassidy now a K-9 officer, was arguing outside. Burgess gets shot while investigating a call when she rang the doorbell, which was connected to the trip wire to the shotgun shell.^[42] In "Shouldn't Have Been Alone", upon investigation it was revealed that the house itself was booby trapped, was for the police 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 partners with Sergeant Platt.^[31]

In "What Do You Do", Burgess and Roman (while on meal break) investigate a suspicious activity in a warehouse, which was later revealed to be a drug deal. Roman had medical experience when he was forced (held at gunpoint) to help a suspect that was shot and was in serious condition. Roman was seriously injured during the whole ordeal, they was saved eventually when Ruzek, while he and his unit was getting a mandatory taser certification, noticed that Burgess had not called responded to his messages.^[11]

In "The Three Gs", Roman gets into a physical altercation with a fellow officer, Officer DeLuca, while deciding on methods of how to save the girl's life, via patrol car to the hospital, when 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. He 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.^[43]

Roman's father is a Vietnam veteran who served in the 5th Marine Regiment.^[44] 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 to carve a stone for Nadia.

In "Justice", he was shot in the patrol 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. Rather than take a desk job he decides to go to San Diego and stay in his cousin's guest house. He wanted to Burgess to come with him but she chose to stay, in which they shared their last kiss and settle feud with Adam Ruzek.

Sheldon Jin

Portrayed by Archie Kao

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 IA officer has been blackmailing Jin into "spying" on the Intelligence Unit, particularly Voight. Jin's father had accumulated a large gambling debt and the IA officer threatened to deport his father back to China if he (Jin) didn't 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. Prior to his death in the season finale, Jin mailed Halstead a thumbdrive with information incriminating the IA officer. 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 (Antonio Dawson was one of her trainees during his days walking the beat) 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 executed, 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".^[27]

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 give her more money. 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 shown calling 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 for backup and now has to lean solely on her usual police pay. They eventually marry in an intimate ceremony at Molly's in the Chicago Fire episode "On the Warpath" and had their honeymoon in the Wisconsin Dells.^[46]

In "All Cylinders Firing", Trudy was having dinner with her father in a fancy restaurant. Platt leaves the restaurant so she can be back in time for her husband when he is done his shift. As Platt unlocks her car door, she is struck in the back and repeatedly beaten. The assailant escapes with her handgun, and neighbors realize she is lying on the ground, 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 the truth and who did this to her. He can’t recall where she said she was going. They question him if it’s 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 wasn't killed. When Burgess gives an update on her case, and asks Platt about the car but she lies by denying about 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 her rolodex. She also smashes a memorial window and takes the golden shovel out of it. Platt now knows who they are after. Voight says we 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 dad’s buildings, and 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 doesn’t 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 isn’t 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 didn't 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 him. All for $272.57; Platt remembers she was working robbery/homicide at the time.

In "Captive", it is implied that her birthday is on January 17 when her colleagues threw her a karaoke birthday party.

Alvin Olinsky

Portrayed by Elias Koteas

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.^[42] 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.^[22]

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.

Hailey Upton

Hailey Upton is a tough former Homicide detective who joined Intelligence Unit and later replaced Erin Lindsay following her departure to New York FBI Office. 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 division. Platt made her feel safe as her father recovered from the attack and inspired Hailey to become a cop herself she made the rank of detective after a year-long undercover assignment the nature of which is still unknown.

In season 5, she is partnered with Jay Halstead. The partnership between the two is rocky during the season.

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 doesn't 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 doesn't 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 when she was working undercover previous 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 could have 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" (undercover Halstead) 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 doesn’t, 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.

Family members

• Justin Voight (Josh Segarra) is the son of Detective Sergeant Henry "Hank" Voight and his late wife Camille. He was one of fraternal twins; his twin sister was stillborn.^[46] Father and son have a strained relationship due to Justin frequently getting into trouble. He is first mentioned in Chicago Fire when Chief Boden's firefighters rescue a boy and his father who were in a near fatal accident caused by Justin's drunk driving. After finding out that the boy was now a paraplegic, a furious Lieutenant Matthew Casey, whose truck company had responded to the call, files a complaint and is threatened by Detective Voight into retracting his statement. The incident would lead to a long-running grudge match between the two. Justin had other run-ins with the law and did a short stint in prison. His father and god-sister Erin Lindsay have tried to set him straight to no avail. Eventually his father forces him to enlist in the U.S. Army to learn discipline and avoid gangs and the bad influence of his recently released former cellmate. After Justin's departure, Voight is accosted by Justin's girlfriend Olive Morgan as she had not heard from the latter for some time (she presumably did not know Voight had forced Justin to enlist on the spot). Upon learning that Olive was pregnant with Justin's child, Voight reaches out to her. Olive is coerced into luring Voight out by vengeful criminals and nearly dies. She and the baby survive the attack. Justin briefly returns to Chicago on leave after hearing about the incident and assures his father that he will declare Olive as his dependent and have her move in with him. Voight gives him Camille's ring for whenever Justin intends to "[make] an honest woman of her". In season 3 it is revealed that Olive gave birth to a boy named Daniel^[16] and that she and Justin did get married.^[46] In the season 3 finale, Justin is seriously injured trying to help the widow of one of his Army buddies and is left in a coma. He never regained consciousness and is taken off life support with consent from his father.
• Barbara "Bunny" Fletcher^[16] (Markie Post) is the biological mother of Detective Erin Lindsay. She is a former drug addict who was negligent of her daughter. Lindsay was eventually rescued by Detective Hank Voight, but not before dabbling in petty crime and being arrested five times. In season 1, Bunny tries to reconnect with her daughter and ask for her forgiveness but Lindsay does not trust her anymore following years of disappointment and false hope. Bunny had another child Teddy Courtney, after her relationship/marriage with Lindsay's biological father ended. In season 3, Lindsay mentions her dumping her fifth husband.

Police officers and CPD employees

• Commander Ronald "Ron" Perry (Robert Ray Wisdom) is the Commanding Officer of the 21st District until his retirement in 2014. He had "six hundred reasons why he didn't want [Voight] to run Intelligence, but one reason why"^[47]—because he got results. He is killed by a group of rogue cops in "Born into Bad News".
• Erica Gradishar (Robin Weigert) is Voight's handler from Internal Affairs. She is portrayed to be a pencil-pushing climber keen on using Voight and other uniformed officers to further her own career. She was furious upon finding out that Commander Perry had chosen Voight over Lieutenant Belden from Violent Crimes to be promoted to head the Intelligence Unit. After hitting a brick wall with Voight, she then tries to talk Antonio Dawson into "spying" on Voight but her plan backfires as Dawson had a grudge against her. She had investigated Dawson's former partner Sean Patterson over a minor incident of the wrong paperwork being filed but because of her, what should have been a minor infraction taken care of in-house turned into a full blown investigation resulting in Patterson being fired and his pension withheld; Patterson committed suicide a year later.^[48] As a result, she leaves her position (whether she was fired, transferred or forced to resign was not made clear), but not without warning Voight that IA would still be breathing down his neck even after her departure.
• Nadia Decotis (Stella Maeve) was an 18-year-old former escort Detective Erin Lindsay helps. The two of them form a friendship and Lindsay becomes a surrogate older sister to her, likely because of Lindsay's own similar experience. Nadia begins working as an administrative assistant at CPD to gain experience as preparation to enter the police academy. Sergeant Platt also took her under her wing and would give her tips on how to pass her interviews and study for the written exam. In "The Number of Rats", Nadia was kidnapped from Chicago by a serial killer named Gregory Yates (Dallas Roberts) and found raped and murdered in New York in "Daydream Believer". She was posthumously honored alongside the fallen officers of the 21st District, including Detective Julia Willhite and Sheldon Jin.
• Commander Fischer (Kevin J. O'Connor) is the new Commanding Officer of the 21st District who took over from Commander Perry after his retirement. His appearances are often met with tension from Voight and the rest of the unit. He is blunt and has no qualms about stepping on Voight's toes, compared to the firm but more diplomatic style of Perry.
• Greg "Mouse" Gerwitz (Samuel Hunt) is the Intelligence Unit's new tech analyst. After Jin was murdered, the team had no one handling the technical aspects and duties were split between Atwater and Ruzek, both of whom detested working behind the desk or with anything technical. He served in the Rangers alongside Halstead and did two tours in Afghanistan, in the Korangal Valley.^[16][17] During his interview with Sergeant Platt, he mentioned that in Afghanistan, he and Halstead were in the lead Humvee of a convoy when they were bombed. In season 2, the character exhibits signs of PTSD, such as drifting off during a conversation, neglecting his personal appearance, the inability to look at anyone in the eye during a conversation and nervous twitches (restless fingers and stuttering). It is implied that he and Halstead supported one another during their difficult readjustment to civilian life.^[20] While Halstead eventually found his calling with the Chicago Police Department, Mouse bounced around from job to job before Halstead took him on as a confidential informant. Voight was initially hesitant to hire him due to his colorful past, which included sniffing nitrous oxide in college^[49] and hacking into a DOD comm satellite, and also partly because of Jin's betrayal. After proving his skills, Voight agrees to hire him, much to Atwater and Ruzek's relief. By season 3, he appears more confident and at ease around Voight and the unit.^[19] He leaves in the episode "A War Zone" to re-enlist in the U.S. Army.^[50]
• Deputy Chief Emma Crowley (Barbara Eve Harris) is one of the highest ranking female police officers and is a friend of Sergeant Platt. Based on her rank, it is presumed that she is likely the area deputy chief overseeing the area District 21 is located in.
• Officer Julie Tay (Li Jun Li) is Burgess' partner during the first five episodes of season 4. Before becoming Burgess' partner she worked at the 'worst patrol' due to her not wanting to have a relationship with a Commander. She is sent back to this patrol in the fifth episode of season 4 when the Command found out about her new assignment.
• Officer Mike Sorensen (Kevin Kane) is introduced in 'Some Friend' as Burgess' partner after Julie was reassigned however after 3 episodes he resigns from the force due to a shooting.
• Detective Kenny Rixton (Nick Wechsler) was detailed to Intelligence from the Gang Unit as a temporary replacement for Ruzek, who had left for an unspecified undercover assignment. As his transfer was somewhat sudden and circumstances sketchy, the team regarded him with some suspicion. However they eventually find out that he left the Gang Unit as he had refused to take part in an IAD investigation into a payback beating he did not participate in but was privy of. He opted for a transfer rather than rat out his colleagues when IAD offered him a deal in exchange for information.^[51] He left after Ruzek returned to take up a position in Narcotics.

Criminals and informants

• Andres Diaz, aka Pulpo (English: "The Octopus") (Arturo del Puerto) is a drug lord and criminal, so nicknamed because he "had [his] hands everywhere". He has dual American and Colombian citizenship and was said to work for a cartel in Medellín. In the series pilot "Stepping Stone", Pulpo is the main person of interest in Voight and the Intelligence Unit's investigations after they discover two dead drug dealers who were beheaded and had their heads displayed prominently nearby.
• Maurice Owens (David Aron Damane) is head of a local gang and one of Voight's informants. He was arrested by patrol officers who witnessed him dealing drugs but Voight bails him out because of his value as an informant. Through Maurice's tip, Voight was able to get a lead on Pulpo in season 1. He also appeared on Chicago Fire in the episode "Let Her Go" and provided Voight with some information about a possible suspect involved in the fire at led to Dr. Hallie Thomas' death. As of season 3, according to Voight, he is in prison.^[17]
• Lonnie Rodiger (Matthew Sherbach) was a young pedophile who was suspected of murdering several boys, including Ben Corson, the younger brother of Detective Halstead's high school sweetheart, some years ago. Halstead would park his car outside the Rodiger home in plain view every year on Ben's death anniversary to make his point to Lonnie that he had not forgotten about Ben and the other murder victims, prompting Lonnie's father Phil to file a restraining order against Halstead and Voight to give Halstead a stern warning to back off before things get out of control. Lonnie was found dead in the episode "At Least It's Justice". Halstead was the prime suspect but was exonerated when Phil confessed to killing his son in a fit of rage upon discovering incriminating photos on Lonnie's computer.
• Gregory Yates (né Williams) (Dallas Roberts) was a sociopathic serial killer who targeted women. He was said to responsible for several unsolved murders in New York. A notable aspect of his crimes was his usage of sadistic torture methods with the intention of letting his victims die slow and painful deaths. His last victim prior to his arrest by the Chicago PD Intelligence Unit was Nadia Decotis. In season 3 he escapes police custody and goes on a rampage while on his mission for revenge.

Other

• Steve Kot (Chris Agos) is an Assistant State's Attorney who often prosecutes perpetrators arrested by the Intelligence Unit and sometimes gives them advice on legal matters. In season 2 he crosses paths with Intelligence and was the prosecutor of notorious Polish mobster Oscar Bembenek, getting a successful conviction. His sixteen-year-old daughter Dora was shot execution-style in broad daylight as part of Bembenek's plot to seek revenge on those he held responsible for his imprisonment.^[25] The character has also crossed over to Chicago Fire.

Minor characters

• FBI Agent Troy Kivisto (Himself) - Enters the sphere in Season 5, portraying the cooperation the FBI Chicago Division has gained working with the Chicago Police Department. He brings to the set his vast "real-life" military and law enforcement background, including his years working undercover in a task force, as a supervisor, as well as participating in numerous Organized Crime Drug Enforcement Task Force (OCDETF) cases with the Federal Bureau of Investigation (FBI), the Drug Enforcement Administration (DEA) and the Illinois State Police (ISP).
• Detective Julia Willhite (Melissa Sagemiller) was the partner of Antonio Dawson. She appeared in both Chicago Fire (1 episode) and Chicago P.D.. The character was killed in the premiere of Chicago P.D. and was the catalyst for Detective Voight's feud with Lieutenant Belden. She was declared DOA after Belden's decision to withhold information backfires and she and Dawson walk into a trap as a result. Her husband Dr. Alec Willhite (Erik Hellman) has also appeared in several episodes of both Fire and P.D.. The couple have two children.
• Lieutenant Bruce Belden (Kurt Naebig) was from the Violent Crimes Unit and Voight's nemesis. In the show's premiere, he withheld information from Voight's team, leading Detectives Willhite and Dawson to walk into a trap and Willhite was killed as a result. Voight blamed Belden for her death. Belden frequently butt heads with Voight over the Pulpo case. It is revealed that Pulpo had played on Belden's over-zealousness to play "by the book" and contradict Voight at any given chance. He is murdered during Pulpo's escape from police custody.
• Charlie Pugliese (Billy Wirth) is a former associate of Erin Lindsay who became a person of interest during an investigation. Voight rescued her from Charlie and she has thus far refused to disclose what really happened, even telling Halstead that he would not want to know the full story. Based on the brief but tense conversations between her and Charlie, it is presumed that he may have taken her in when she was living on the streets and forced her to commit crimes in exchange for food and shelter.
• Teddy Courtney (Lou Taylor Pucci) is the half-brother of Erin Lindsay and son of Bunny. He and Lindsay were once close but lost contact after he "disappeared" from home (Bunny assumed he ran away). A photo of him was found in the basement of a house fire which Lieutenant Severide and 51 had responded to. Severide saw the victim clutching a box of pictures and handed it to Voight's team. While sifting through the photos, Lindsay discovers one of a young Teddy. In a three-way crossover (see "Chicago Crossover"), Intelligence and NYPD's Detective Benson and her SVU team investigate a highly sophisticated pedophile ring-cum-child trafficking syndicate that has operated out of Chicago and New York City for many years. Teddy is found in New York City where he is now a male prostitute. His testimony would lead to the shutting down of the ring.

Chicago Fire

• Gabriela "Gabby" Dawson (Monica Raymund) is the younger sister of Antonio Dawson. She is a firefighter with Truck 81 based out of Firehouse 51, several blocks away from her brother's district. During her pregnancy (with Lieutenant Casey's child), she was temporarily assigned to arson. She, Herrmann and Otis jointly own and run Molly's, a small bar frequented by the characters from all four shows of the Chicago franchise.
• Christopher Herrmann (David Eigenberg) is a colleague of Gabby Dawson at 51 and an owner of Molly's. He largely appears in scenes at Molly's, where he serves drinks and chats with patrons.
• Brian "Otis" Zvonecek (Yuri Sardarov) is a colleague of Gabby Dawson and Herrmann at 51 and an owner of Molly's. Like Dawson and Herrmann, his appearances are mainly confined to scenes at Molly's, when he chats with patrons while serving drinks. In the episode "The Docks" he helped Intelligence translate some Russian as the team was investigating some Russian mobsters who spoke no English.
• Randy "Mouch" McHolland (Christian Stolte) is the husband of Sergeant Platt and a fellow firefighter of Gabby, Otis and Herrmann at 51. In "What Puts You on That Ledge", he helps Roman and Burgess with a case of an uncooperative squatter who refuses to return the apartment to its owners.
• Peter Mills (Charlie Barnett) is a former firefighter and paramedic at 51. He was the responding paramedic to several of the Intelligence Unit's calls involving injured victims.
• Sylvie Brett (Kara Kilmer) is a paramedic at 51. She has occasionally crossed paths with Intelligence on the job and is friends with Lindsay and Burgess. She and Gabby sometimes hang out with them.

Chicago Med

• Dr. Will Halstead (Nick Gehlfuss) is the brother of Jay Halstead and an attending at the Gaffney Chicago Medical Center. He was first introduced in the episode "Say Her Real Name" when he returns home to Chicago and was trying to stop a bar fight when the officer called to the incident recognized his last name and called Platt to alert Jay. He initially moves back from New York City after being "kicked out" of a practice by his partners and then gets a job at Chicago Med, only to tell Jay that he would be returning to New York City after his first day.^[52] In the Chicago P.D. episode "Get Back to Even", Will tells his brother that he decided to stay as Chicago Med needed ER doctors. The brothers share a close relationship and their paths have crossed several times in Jay's investigations.
• Dr. Daniel Charles (Oliver Platt) is a psychiatrist at Chicago Medical Center. Erin Lindsay was forced by Voight to seek counseling from Dr. Charles as part of the conditions for regaining her badge. Although she makes no secret of her dislike of shrinks, she appreciates Dr. Charles' compassion and genuine desire to help her. Dr. Charles has also aided the team in cases involving psychologically unstable criminals.
• Dr. Natalie Manning (Torrey DeVitto) is an ER pediatrician at Chicago Medical Center. She occasionally assists Voight and the Intelligence Unit on investigating their cases.