The show explores the professional and personal lives of thefirefighters, rescue personnel, andparamedics of theChicago Fire Department at the fictional Firehouse 51, home of the Engine 51, Truck 81, Rescue Squad 3 and Ambulance 61.
The bays and exterior set forChicago Fire is the real-life Engine 18, but here they are marked for filming as Engine 51, Truck 81, Squad 3, and Ambulance 61. The distinctions among these different entities are a key element in the series.
Jesse Spencer asLieutenant Matthew Casey, Truck Company 81 (seasons 1–10; guest seasons 11–12[6]) Casey is the lieutenant at Firehouse 51 and the officer in charge of Truck Company 81. He serves as second in command to Battalion Chief Wallace Boden. Casey is a skilled handyman and carpenter—he freelances as a construction contractor when off-duty. He is civic-minded and becomes an electedalderman to further serve the city. Despite his reticence and aloof demeanor, he is fiercely protective of the firefighters under him and commands their loyalty and respect. He was briefly engaged to Dr. Hallie Thomas in season one and from seasons five to seven, was married to Gabriela Dawson. In the sixth-season episode "An Even Bigger Surprise", he is promoted to captain by Chief Boden. In the ninth-season finale "No Survivors", he begins dating paramedic Sylvie Brett. In the tenth-season episode "Two Hundred", Casey moves to Oregon to take care of Andrew Darden's sons but maintained a long-distance relationship with Brett. He later returns in the season finale to attend Severide and Kidd's wedding. In the eleventh-season premiere, Brett breaks up with him feeling that they had grown apart by the distance. In the season 11 finale "Red Waterfall", he returns to Chicago and proposes to Sylvie; they married in season 12 episode 6 "Port in the Storm".
Taylor Kinney as Lieutenant Kelly Severide, Rescue Squad 3. Severide is the Lieutenant at Firehouse 51 and the officer in charge of Squad 3. In contrast to Casey, he is charismatic and portrayed to be something of a "ladies' man". He and Casey have been friends since their days at the CFD Academy, but their friendship becomes strained after a mutual colleague dies on the job. His father was Chief Benny Severide, a long-time friend of Chief Boden and Henry Mills, father of Candidate Peter Mills. In the season 4 finale, "Superhero", he begins dating Stella Kidd. In the season 9 episode "A White-Knuckle Panic", they become engaged. In the season 10 episode "The Magnificent City of Chicago", they get married.
Monica Raymund as Paramedic in Charge Gabriela "Gabby" Dawson, Ambulance 61 (seasons 1–6; guest seasons 7–8).[7][8] She is the younger sister ofChicago P.D. andChicago Justice characterDetective Antonio Dawson. Dawson is one of the few women in 51 and is usually treated as a sister by the men. She is the Paramedic in Charge (PIC) of Ambulance 61 but goes to the fire academy and passes the training to become a firefighter and joins Truck 81. She later transfers back to Ambulance 61 to provide cover for Jimmy Borelli when he transfers back to Truck 81 and after becoming a foster parent has become more concerned about the dangers of the job. In season one, she briefly dates Peter Mills. From seasons five to seven, she was married to Matt Casey. After the sixth-season finale "The Grand Gesture", she left Chicago to head a rescue-and-relief unit in Puerto Rico, but briefly returned to say goodbye to Casey in the seventh-season premiere "A Closer Eye" and again for a charity ball in the eighth-season episode "Best Friend Magic".
Lauren German as Paramedic Leslie Elizabeth Shay, Ambulance 61 (seasons 1–2; guest season 3). As an experienced paramedic, Shay was the designated ambulance driver and was well-liked by the mostly male crew of 51. She and Kelly Severide shared an apartment as roommates and were best friends. Popular with her co-workers, she was an openlesbian, often cracking self-deprecating jokes about it. In the third-season premiere "Always", she was killed in its continuation of the second-season finale "Real Never Waits" cliffhanger, in which a serial arsonist intentionally set a trap for the first responders. In "Three Bells", she was honored and remembered by her co-workers at 51. She is memorialized by an inscription painted on the cab door of Ambulance 61.
Charlie Barnett as Firefighter Candidate Peter Mills and later Truck 81, Squad 3, Ambulance 61 (seasons 1–3). Mills begins as a candidate on Truck 81, following in his deceased father's footsteps, but after proving his capabilities as a firefighter, he earns a spot on Squad 3. After losing his firefighter certification due to injury, he transfers to Ambulance 61 to keep working. He eventually recovers and earns his spot back on the squad but chose to leave Chicago in "You Know Where to Find Me" to work with his family in North Carolina. He briefly dates Gabriela Dawson in season one.
David Eigenberg as Senior Firefighter Christopher Herrmann, Engine 51, previously Truck 81: Initially one of the senior firefighters at 51, he serves on Truck 81 before he passes the Lieutenant exam, after five previous attempts, and is officially promoted to Lieutenant in the seventh-season episode "Thirty Percent Sleight of Hand" and takes over as officer in charge of Engine Company 51. As Lieutenant, he serves as fourth-in-command to Battalion Chief Wallace Boden. A father figure to the firehouse, the men and women often come to him for advice. He engages in many get-rich-quick schemes before he, Otis and Dawson jointly invest in a small bar one of their victims had been trying to sell, which they call Molly's. Molly's is also featured onChicago P.D. andChicago Med as a favorite hangout of cops and medical personnel. In season 13, Boden persuades Herrmann to take the Captain's exam, and despite his doubts in episode "A Favor", Herrmann has passed the exam and is promoted to Captain. In the season 13 finale "It Had to End This Way", Herrmann voluntarily turned his captain's bugles and was demoted to firefighter.
Eamonn Walker as Battalion ChiefWallace Boden, Battalion 25. (seasons 1–12; recurring season 13).[9] He oversees the firefighters and paramedics of Truck 81, Engine 51, Squad 3 and Ambulance 61 at Firehouse 51. A long-time veteran of the CFD, he is extremely protective of the men and women who serve under him, putting his career on the line several times to help them. He is married to Donna, a teacher, and they have a son named Terrance, who was born in season 3. In season 10, he was promoted to Deputy District Chief. In the season 12 finale "Never Say Goodbye", he was appointed as the new Deputy Commissioner of the CFD. In the season 13 episode "Post-Mortem", he returns to investigate a dangerous fire that caused a firefighter to be left trapped inside a burning building.
Yuri Sardarov as FirefighterBrian "Otis" Zvonecek, Truck 81 (recurring season 1; seasons 2–8). Prior to Mills' assignment in the pilot, Otis was the latest candidate to be assigned to 81. He was routinely assigned to work elevators, and his nickname "Otis" came from theOtis Elevator Company. He became the driver after Joe Cruz transferred to Squad 3. In the season eight premiere, "Sacred Ground", he was fatally wounded (continuing from the season seven finale, "I'm Not Leaving You", cliff-hanger) and dies with Cruz by his side in the hospital.
Christian Stolte as Senior Firefighter Randall "Mouch" McHolland, Truck 81 (recurring season 1; season 2 – 14). Another of 51's senior firefighters, Mouch is the de facto "legal advisor" of 51 and is their union representative. His nickname is a portmanteau of "man" and "couch" since he is almost always seen sitting on the couch in the lounge watching TV when not on a call. In the fourth-season episode "On the Warpath", he marriesChicago P.D. characterSergeant Trudy Platt. In the season 13 episode "A Favor", he is promoted to Lieutenant, although he remains Senior Firefighter aboard Truck 81 as Lieutenant Kidd is the senior officer. He later moves to another fire house once his engine is decommissioned
Joe Minoso as FirefighterJoe Cruz, Squad 3 (recurring season 1; main season 2 – present). A native of the gangster-infested neighborhoods ofHumboldt Park, he spends the first two seasons constantly trying to bail his wayward younger brother out of trouble. In the third-season finale, "Spartacus", he transfers to Squad 3. In season three, he briefly dates Sylvie Brett. In the eighth-season episode "Light Things Up", he marries Chloe Allen. He was formerly the designated driver for Truck 81 before his transfer to Squad 3. In season 10, episode 200, his son is born, and they name him Brian "Otis" Leon Cruz.
Teri Reeves as Dr. Hallie Thomas (season 1). Matt Casey's ex-fiancée. They broke up due to differing views, her hectic schedule and his irregular hours which prevented them from spending much time together, but they remained friends. They briefly rekindled their relationship until she was murdered in a fire as part of a cover-up after she discovered that one of her colleagues at her clinic was selling medication to drug dealers.
Kara Killmer as Paramedic Sylvie Brett, Ambulance 61 (seasons 3–12). Sylvie is a paramedic who joins Ambulance 61 in season three, replacing Leslie Shay after her death. She is a small-town girl fromFowlerton, Indiana, and is a "runaway bride" who goes upI-65 to Chicago. Initially, she has difficulty adjusting to city life due to her naiveté, as shown by the fact that she leaves cash out on the table with the windows open and rented an apartment in a neighborhood known for crime because the rent was cheap. She briefly dates Joe Cruz in season three and shares an apartment with Dawson prior to the latter's marriage to Casey. After her third partner, Jessica Chilton, is fired, Sylvie is promoted to Paramedic in Charge (PIC) (season 4). She dates Dawson's brother Antonio on and off from seasons five to six and is also briefly engaged to Chaplain Kyle Sheffield from seasons seven to eight. In the ninth-season finale, "No Survivors", she begins dating Dawson's ex-husband Captain Matthew Casey, and in the tenth-season episode "Two Hundred", she begins a long-distance relationship with Casey when he moves to Oregon, which she later ends in the eleventh-season premiere after feeling that they had grown apart by the distance. In the season 11 finale "Red Waterfall", Casey returns to Chicago and proposes to Sylvie; they married in season 12 episode 6, "Port in the Storm".
Dora Madison as Paramedic in Charge Jessica "Chili" Chilton (recurring season 3; main season 4). She was brought in to replace Peter Mills as the new Paramedic in Charge (PIC). Her arrival is initially met with some frostiness from the rest of the crew since they were still getting over Mills' sudden departure. She was previously with a firehouse in theWest Side and is experienced in dealing with victims of major trauma. She dates Jimmy Borelli in the fourth season. She is later fired by Chief Boden during the fourth season after the death of her sister causes her to nearly kill a patient by giving the patient the wrong medicine and later to relapse into alcoholism. After she is fired, she calls Kelly Severide for help, and he takes her to an Alcoholics Anonymous meeting.
Steven R. McQueen as Firefighter Candidate Jimmy Borrelli (seasons 4–5). He was introduced in the fourth-season premiere "Let It Burn" as the new candidate assigned to Truck 81. He briefly dates Jessica "Chili" Chilton in the fourth season and also briefly replaces her as a paramedic on Ambulance 61 after Chilton is fired. After his brother dies in a collapsed building, he blames Chief Boden and transfers back to Truck 81. He is critically injured by an explosion early in the fifth season that results on the loss of his left eye, thus ending his firefighting career.
Miranda Rae Mayo as Firefighter Stella Kidd: Truck 81 (recurring season 4; main season 5 – present). She was introduced in Season 4 as Jimmy Borelli's replacement on Truck 81. She briefly replaces Otis as driver in season six and permanently replaces him after his death in season eight. She is promoted to Lieutenant in the ninth-season episode "What Comes Next" after passing the exams. In the fourth-season finale, "Superhero", she begins dating Lieutenant Kelly Severide. In the ninth-season episode "A White-Knuckle Panic", they become engaged. In the last episode of the tenth season, they get married.
Annie Ilonzeh as Paramedic Emily Foster, Ambulance 61 (seasons 7–8).[10][11] A former medical student who replaces Gabriela Dawson on Ambulance 61. In the eighth-season finale "51's Original Bell", she re-applies to medical school, and in the ninth-season premiere "Rattle Second City", Brett says that she was accepted back and is working in a COVID-19 ward.
Alberto Rosende as Firefighter Candidate Blake Gallo, Truck 81 (seasons 8–12).[12] Firehouse 51's latest recruit on Truck 81, replacing Brian "Otis" Zvonecek after his death. Gallo became a firefighter after he lost his entire family in a house fire. In November 2023, it was revealed that Gallo would leave the series after the season 12 premiere, which reveals that he has opted to move to Michigan to be near his relatives.[13]
Daniel Kyri as Firefighter Candidate Darren Ritter, Engine 51 (recurring seasons 7–8; main seasons 9–13, guest season 14).[14] After Herrmann forcibly transfers Firefighter Barns for his disrespect, Mouch suggests Ritter as a replacement. Previously with Engine 37, Mouch helped Ritter when Ritter froze up during a fire, and Ritter ended up making his first save. He is openly gay, previously had a boyfriend named Eric (season 9), and is dating Officer Dwayne Monroe (season 12). He is the owner of Tuesday, a Dalmatian.
Adriyan Rae as Paramedic Gianna Mackey, Ambulance 61 (season 9), Emily Foster's replacement on Ambulance 61. Gianna grew up in the same neighborhood as Joe Cruz, who recommended her for the job after Foster left and is very protective of her.[15] She quickly makes a good impression on her co-workers and enters a casual relationship with Blake Gallo. In the ninth-season episode "Double Red", she transfers out of Firehouse 51 after being offered a spot at a new house for better advancement opportunities.
Hanako Greensmith as Paramedic Violet Mikami (recurring seasons 8–9; main season 10 – present).[16] A paramedic from Firehouse 20 and Blake Gallo's old rival from the fire academy. She and Gallo briefly date in season eight. In season nine, Chief Boden asks her to temporarily transfer to Firehouse 51 to fill the spot on Ambulance 61 after Gianna Mackey leaves, and Brett soon convinces her to transfer to Firehouse 51 permanently. Following Sylvie Brett's departure in the Season 12 episode "Port in the Storm", Violet was promoted to Paramedic in Charge.
Jake Lockett as Firefighter Sam Carver (recurring seasons 11–12; main season 13; guest season 14).[17] A former rival of Kidd's from the academy recruited to Truck 81. Proving himself a solid firefighter, Carver takes time to warm up to the crew. He works through issues of his own uncaring family and eventually accepts the genuine camaraderie of Firehouse 51. An off-shift carouser and bit of a womanizer, he eases into a romance with Violet by the end of season 12. When the relationship stalls, Carver backslides into destructive behavior resulting in him attending 12-step meetings for alcoholism and rehab. In the season finale of Season 13, he revealed that he was transferring to the Denver Fire Department in order to support his sobriety and make a fresh start.
Jocelyn Hudon as Paramedic Lizzie Novak, (recurring season 12; main season 13 – present).[18][19] Brett's replacement on Ambulance 61, a free-spirited paramedic who preferred to float from firehouse to firehouse until she embraced the stability of 51. Novak is flirtatious with a mischievous sense of humor but shows herself to be an advocate for the victims she encounters daily on the job.
Dermot Mulroney as Battalion Chief Dominick "Dom" Pascal, Battalion 25 (season 13 – present).[20] Pascal replaces Boden as Battalion Chief of Firehouse 51. A stoic, dark-humored leader who has returned to Chicago to reunite with his estranged wife after dealing with corruption at his former post in Miami. Pascal's scrutinizing style differs from Boden's but he quickly establishes respect and allegiance among the crew at 51. He is widowed towards the end of Season 13 and works through his grief by staying on duty.
Brandon Larracuente as Firefighter Sal Vasquez (season 14).[21] A cocky new firefighter and driver for Truck 81. He was formerly in the police academy, and has a reputation for subverting his superior's orders if he sees it's fit.
Randy Flagler as Senior Firefighter Harold Capp:[22] A member of Squad 3.
Anthony Ferraris as Firefighter Tony Ferraris: A member of Squad 3. Outside the show, Ferraris also serves as an active firefighter in real life for the Chicago Fire Department.[23] He has assisted in the production of the series by contributing his expertise from his numerous years of firefighting in order to bring the show a sense of realism.[24]
Mo Gallini as Firefighter Jose Vargas (season 1): A recent transfer to Squad 3 from Truck 81. A sixteen-year veteran, he is forced to retire after he is injured in a warehouse fire and considers suicide by jumping from his apartment building rooftop, but Severide and Casey talk him out of it.
Shiri Appleby as Clarice Carthage (season 1): The pregnant ex-girlfriend of Leslie Shay, who briefly rekindles their relationship.
Kathleen Quinlan as Nancy Annalyn Casey (season 1): Matthew and Christie Casey's mother who was incarcerated for murdering their verbally abusive father and her husband Gregory in 1997, fifteen years prior to the beginning of the series. She has grown estranged from her children while in prison, but Casey is successful in getting Nancy released and she stays with him as part of her parole. However, things become tense when Casey voices his discomfort about her going out with a "penpal" just hours after being released and she moves in with her former cellmate, but not before telling her children to mend their relationship.
Sarah Shahi as Renee Royce (seasons 1–2, 6):[25] A woman who becomes attracted to Kelly and briefly dated him after he saves her in a traffic accident.
Treat Williams as Benjamin "Benny" Severide (seasons 1–2, 6; guest seasons 4–5, 7): Kelly's father and a retired battalion chief of Battalion 22, who served with Chief Boden and Peter Mills' father, Henry.[26] He had a love-hate relationship with his son as he had left Kelly and his mother when he was ten years old. In the seventh-season episode "All the Proof", he suffers a stroke and dies.
Alexandra Metz as Elise Mills (seasons 1–3): Peter Mills' sister. She helps run the family restaurant with her mom and is torn between being protective of Peter and encouraging him to follow his passion for public service.
Robyn Coffin as Cindy Herrmann: Christopher Herrmann's wife, and mother of their five children.
William Smillie as Firefighter Kevin Hadley (seasons 1–3): A member of Squad 3 who is transferred after playing an inappropriate prank on and making a racially insensitive slur against Peter Mills. He later becomes an arsonist, targeting his old firehouse and Mills and Severide in particular, whom he blames for his transfer and inability to find a permanent house since. He is eventually stopped and severely burned by his own materials, and is arrested and sent to prison for his crimes. Hadley later resurfaces to give Severide information on the arsonist responsible for the deaths of Mills' father, Henry, and paramedic Leslie Shay.
Christine Evangelista as Paramedic-in-Charge Allison Rafferty, Ambulance 61 (season 2): Dawson's replacement on 61 after she starts training at the academy to become a firefighter.
Brittany Curran as Katie Nolan (season 2; guest season 7): Benny Severide's daughter, Kelly's half-sister; a chef.
Michelle Forbes as Gail McLeod (season 2): A financial consultant hired by the state to help trim the budget of the CFD, which includes closing firehouses.[27]
John Hoogenakker as Lieutenant Spellman (season 2): A firefighter assigned to Firehouse 51, along with Clarke, after city budget cuts force the downsizing of the department. He is eventually outed as Gail McLeod's mole and forced to transfer out of the firehouse.[28]
Melissa Ponzio as Donna Boden (seasons 2–9,12): A schoolteacher whom Chief Boden falls for and eventually marries. She is the mother of his son, Terrance.
Jeff Hephner as Lieutenant Jeff Clarke (seasons 2, 5): A former Marine turned firefighter. After his firehouse is closed, he is transferred to Squad 3. He is initially not well-liked by the rest of the crew since he is extremely private and prefers to read newspapers at the squad's table rather than socialize with them in the lounge. Additionally, his arrival at Firehouse 51 coincides with McLeod's efforts to close it, and he is accused of being her mole. After getting injured on the job, he quits the CFD and starts as a medical student at Chicago Med.
Edwin Hodge as Firefighter Rick Newhouse, Squad 3 (seasons 2–3): A transfer from the fictional Squad 6. His experience and charismatic personality quickly win over Severide and the rest of the men, although Herrmann initially antagonized him as he had yet to come to terms with the recent suicide of Candidate Rebecca Jones. When off duty, he moonlights as askiptracer and entertains his coworkers with stories of his "clientele".
Warren Christie as Firefighter Scott Rice, Squad 3 (season 3): An old friend of Severide's whom he brings on to replace Newhouse following his transfer. He soon forms a rift between both Squad and Truck after the latter suspects him of ducking fires. After it is confirmed, he admits to being afraid of orphaning his son and is let go from 51.
Gordon Clapp as Chaplain William Orlovsky (seasons 3–6): A CFD Chaplain who offers spiritual advice and therapy
Brian J. White as Captain Dallas Patterson, Squad 3 (season 4): A new captain brought in to replace Severide after a review board found the turnover rate for Squad 3 too high under his leadership. He later transfers out after rebelling against the corrupt Deputy Chief Riddle who had been hoping to use him to oust Boden as Battalion Chief.
Michael Cognata as Julian Robbins (season 6–present): Chief Boden's brother-in-law.
Damon Dayoub as Firefighter Jake Cordova (season 6): A confident, rugged firefighter who is assigned to Truck 81 as a temporary replacement for Otis after he is injured on a call.[29]
Tim Hopper as Captain Tom Van Meter (seasons 6–13): A Captain in the Fire Investigations department of the CFD.
Teddy Sears as Chaplain Kyle Sheffield (seasons 7–8): Orlovsky's replacement as CFD Chaplain. He is briefly engaged to Sylvie Brett from seasons seven to eight.
Katelynn Shennett as Kylie Estevez (seasons 8–13): The first recruit in the Girls on Fire program, who becomes an office assistant to Chief Boden, then a fire fighter at another house until Hermann recruits her to ride Engine at 51.
Jon-Michael Ecker as Lieutenant Greg Grainger (season 9): a lieutenant from Firehouse 40 temporarily assigned to Engine 51 after Herrmann left on vacation. He briefly casually dates Brett until he realizes she can't commit due to her connection to Casey.
Chris Mansa as Firefighter Mason Locke, Truck 81 (seasons 9–10), an ex-convict who has firefighter training from his time in prison, but has been rejected from the CFD due to his criminal record. Hermann helps him get a job with a fire department inSt. Paul, Minnesota. After he returns to Chicago with his record expunged, Locke is eventually recruited for Truck 81 by Kidd at Herrmann's urging. In the eleventh-season premiere, it's revealed he has transferred to a more rural area and is back to fighting wildfires.
Brett Dalton as Interim Lieutenant Jason Pelham, Truck 81 (season 10),[30] a floater lieutenant brought on to temporarily lead Truck 81 following Casey's departure. He gets off to a rough start with the team, especially with Gallo, but they gradually earn each other's respect. Pelham had been stuck in rotation ever since he forced his former captain into retirement. Boden learns the full story and trusts Pelham, but many higher-ups in the department hold a grudge against Pelham, and try to force him out. Firehouse 51 rallies around Pelham, saving his career. He takes the opportunity to transfer and lead a new team, making way for Stella Kidd to take over.
Jimmy Nicholas as Paramedic Chief Evan Hawkins (seasons 10–11), Chief of Paramedics in the CFD. He has a love affair with Violet, which endures several setbacks until he is tragically killed protecting a fire victim in season 11.
Caitlin Carver as Paramedic Emma Jacobs, Ambulance 61 (seasons 10–11), a temporary paramedic filling for Brett who attempts to sabotage Violet in order to secure herself a permanent spot at the firehouse. She is terminated after fleeing an intense call but resurfaces in season 11 as an Internal Affairs investigator. Jacobs uses the new position to intimidate 51 until her previous acts of blackmail are proven and she is fired from the CFD.
Pouch the dog (seasons 1–4):[31] Mills is given a dog by a child from a family who could not take care of it. Herrmann, Chief Boden and Mouch initially decide against it, but eventually agree to let her be adopted by the team. Pouch's name was decided by Herrmann, who suggests that she should be named after Mouch (half man, half couch) as Pouch (half pooch, half couch). In the fourth season, 51 allows her to be adopted by the son of a CPD detective killed in the line of duty to help him with his grief.
Tuesday the dog (seasons 7–10): A Dalmatian dog belonging to Ritter. She has separation anxiety, so Ritter brings her to the firehouse and she ends up becoming the firehouse dog, replacing Pouch.[32]
Rome Flynn as Derek Gibson (season 12), a former amateur boxer with a dark past.[33] He leaves during the episode "All the Dark" to seek treatment for a drug addiction.[34]
Michael Bradway as Jack Damon (seasons 12–13), a firefighter who joins Truck 81 and is later revealed to be Kelly Severide's half brother.[35]
KaDee Strickland as Monica Pascal (season 13), the estranged wife of Battalion Chief Dominick “Dom” Pascal.[36] She was killed in a car accident in the season 13 episode "Too Close".[37]
"8:30 PM" (Chicago P.D. Season 1, Episode 12) – In the first crossover withP.D., beginning on "A Dark Day", an explosion occurs at Chicago Med, sending the fire and police departments in a race against the clock to find the culprits.
"Chicago Crossover" (Law & Order: Special Victims Unit Season 16, Episode 7) / "They'll Have to Go Through Me" (Chicago P.D. Season 2, Episode 7) – In the first crossover withP.D. andSVU, beginning on "Nobody Touches Anything", a routine house fire uncovers evidence of apedophile ring spanning from Chicago to New York.[52]
"A Little Devil Complex" (Chicago P.D. Season 2, Episode 13) – In the second crossover withP.D., beginning on "Three Bells", Firehouse 51 and Intelligence search for the serial arsonist who killed Leslie Shay.[53]
"The Number of Rats" (Chicago P.D. Season 2, Episode 20) / "Daydream Believer" (Law & Order: Special Victims Unit Season 16, Episode 20) – In the second crossover withP.D. andSVU, beginning on "We Called Her Jellybean", a fire uncovers evidence of a serial arsonist suspected of committing rape and murder in Chicago and New York.[54][55]
"Malignant" (Chicago Med Season 1, Episode 5) / "Now I'm God" (Chicago P.D. Season 3, Episode 10) – In the first crossover withMed andP.D., beginning on "The Beating Heart", a member of Firehouse 51 is rushed to Chicago Med for a stabbing while an attempted suicide uncovers four cases of chemo overdose, leading to an investigation that becomes personal for Voight.
"Don't Bury This Case" (Chicago P.D. Season 4, Episode 9) – In the third crossover withP.D., beginning on "Some Make It, Some Don't", Severide becomes the prime suspect in a case of vehicular manslaughter.
"Emotional Proximity" (Chicago P.D. Season 4, Episode 16) / "Fake" (Chicago Justice Season 1, Episode 1) – In the only crossover withP.D. andJustice, beginning on "Deathtrap", the prime suspect in a warehouse fire is put on trial.
"Profiles" (Chicago P.D. Season 5, Episode 16) – In the fourth crossover withP.D., concluding on "Hiding Not Seeking", Firehouse 51 helps Intelligence investigate a series of bombings targeting members of the media.
"When to Let Go" (Chicago Med Season 4, Episode 2) / "Endings" (Chicago P.D. Season 6, Episode 2) – In the second crossover withMed andP.D., beginning on "Going to War", the victims of an apartment complex fire are rushed into Chicago Med and Intelligence races to find the culprit.
"Good Men" (Chicago P.D. Season 6, Episode 15) – In the fifth crossover withP.D., beginning on "What I Saw", Cruz helps Intelligence track down robbers who have been using a firehouse lockbox key.
"Burden of Truth" (Chicago P.D. Season 7, Episode 15) – In the sixth crossover withP.D., beginning on "Off the Grid", Sean Roman gets involved in the investigation of opioid overdoses connected to his sister.[56]
"Infection" (Chicago Fire Season 8, Episode 4/Chicago Med Season 5, Episode 4/Chicago P.D. Season 7, Episode 4) – In the third crossover withMed andP.D., a bioterrorist spreads a deadly bacteria throughout Chicago.
"In the Trenches" (Chicago Fire Season 13, Episode 11/Chicago Med Season 10, Episode 11/Chicago P.D. Season 12, Episode 11)
The series pilot, co-written by creatorsMichael Brandt andDerek Haas, was filmed in Chicago and, according to an NBC representative, the series would continue to be filmed there.[57] ProducerJohn L. Roman was involved from the beginning having worked with the Chicago Fire Department and Deputy District Chief Steve "Chik" Chikerotis onBackdraft.[58]Mayor of ChicagoRahm Emanuel made an appearance in the series' pilot episode. Emanuel stated: "It's easier being mayor than playing mayor. I told them I'd do it under one condition: the TV show is making an investment to the Firefighters' Widows and Orphans Fund."[59]
The title "Chicago Fire" sparked some confusion in the show's first season due to it duplicating the name of a local professional soccer team, theChicago Fire Soccer Club (later renamed Chicago Fire FC). Actor Taylor Kinney has said "If you (say) 'We're working onChicago Fire,' they ask you if you're a soccer player."[60] Producer Dick Wolf hoped that fans of the team might watch the show.[60] The Chicago Fire sports team accepted the shared name and showed the series premiere on October 2, 2012, atToyota Park after a game with thePhiladelphia Union.[61]
The network placed an order for the series in May 2012.[62] After receiving an additional script order in October,Chicago Fire was picked up for a full season on November 8, 2012.[63][64] On January 29, 2013,Chicago Fire had its episode total increased from 22 to 23.[65] One week later, on February 6, 2013,Chicago Fire received one more episode, giving it a total of 24 episodes for season one.[66] The pilot episode had an early release at NBC.com, before the series' premiere on television.[67]
On November 9, 2015, NBC renewed the series for a fifth season.[68][69] The season premiered on October 11, 2016.[70]
On May 9, 2018, NBC renewed the series for a seventh season,[71] which premiered on September 26, 2018.[72] On February 26, 2019, NBC renewed the series for an eighth season,[73] which premiered on September 25, 2019.[74] In February 2020, the series was renewed for its ninth, tenth, and eleventh season.[75] Thetenth season premiered on September 22, 2021.[76] The eleventh season premiered on September 21, 2022.[77] On April 10, 2023, NBC renewed the series for a twelfth season,[2] which premiered on January 17, 2024.[3] On March 21, 2024, NBC renewed the series for a thirteenth season which premiered on September 25, 2024.[78][79]
For the first five seasons Matt Olmstead, Michael Brandt, and Derek Haas served as the seriesshowrunners. Dick Wolf is also credited as a co-showrunner for the third season alongside Olmstead, Brandt, and Haas. Beginning with the sixth season, Haas took over as the sole showrunner.[80] Executive producer Andrea Newman was promoted to co-showrunner with Haas for the tenth and eleventh seasons.[81] Haas stepped down from his position ahead of the twelfth season while Newman took over as sole showrunner.[82]
On May 5, 2025, NBC renewed the series for a fourteenth season which is scheduled to premiere on October 1, 2025.[4][5]
Firehouse 18 as the fictional Firehouse 51; the Sears Tower visible in the distance, a framing that is often used on the show
The building used in the show for the firehouse exteriors is a working Chicago Fire Department firehouse, and is the headquarters of Engine 18, located at 1360 South Blue Island Avenue at Maxwell Street, between 13th & Racine. Housed here is ALS Engine 18, 2–2–1 (Deputy District Chief – 1st District), 2–1–21 (1st District Chief), 6–4–16 (High-Rise Response Unit), and ALS Ambulance 65. The interiors of Firehouse 51 are filmed atCinespace Chicago Film Studios. The station house used for exteriors inChicago PD is just a few blocks away at 949 West Maxwell Street at Morgan Street (interiors likewise filmed at Cinespace).
Chicago artist and retired firefighter Lee J. Kowalski's oil paintings of fire scenes can be spotted in several episodes.
Lotties, the initial location and inspiration for the Molly's bar seen on the show
Molly's, a small bar owned by Herrmann, Dawson and Mouch, was filmed at Lotties inBucktown.[83][84] Filming no longer takes place on location to avoid disrupting business. Instead, the interior and exterior surroundings were recreated at Cinespace.[85]
In November 2012,WGN-TV reported a plane crash at 29th and Martin Luther King Drive ontheir morning newscast and showed live footage for a few minutes before realizing it was merely a set piece staged forChicago Fire and not an actual emergency situation.[86]
On March 13, 2020, Universal Television shut down production on the series due to theCOVID-19 pandemic.[87]
Production on the series was temporarily halted on September 14, 2022, after a shooting occurred near the set.[88]
Chicago Fire was the first show of what would becometheChicago franchise.[128] Additionally,Chicago P.D. aired a backdoor pilot of the short-lived legal drama seriesChicago Justice, which ran from March 1, to May 14, 2017.
In Malaysia, the series aired onPRIMEtime for eight seasons, then moved to HITS Now.[136]
In the United Kingdom and Ireland, the series airs as part of the One Chicago block 8pm through 11pm. Earlier seasons were shown on the now defunct Universal channel before moving toSky Witness. All episodes are available +7 days and on demand.[137]
Ion Television has acquired the off-network rights to air the series. Episodes began airing in June 2021.[138]MyNetworkTV also acquired the off-network rights to air the series. Episodes began airing in September 2021.[139] FellowNBCUniversal networkUSA also acquired the off-network rights to air the series. Episodes began airing in January 2022.
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