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A homeless man dies in a warehouse fire. Peter Mills might have saved him if he had another minute, but Chief Boden had called everyone outside, as the building was about to explode. Boden knows he did the right thing, but the victim's brother threatens to sue the city. Meanwhile, Det. Voight goes to the next level in his attempt to intimidate Casey; Kelly finds it suspicious that an old lady has been having several accidental fires lately; and Leslie learns some surprising news about an old girlfriend.
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Gabriela prepares for her suspension hearing and Casey for his deposition. When it becomes obvious that Voight would do anything to protect his son, Hallie and Matt fear for their lives. Casey's only hope is that Det. Antonio Dawson can stop Voight before it's too late.
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Between a meth lab explosion, a gang shooting, a turkey fire and a 10-car pile-up, the firehouse is very busy on Thanksgiving. Meanwhile, Chief Boden wants to help a damaged kid, Otis starts a podcast, Leslie's ex-girlfriend pays her a visit, Matt and Hallie have another talk about their future, and Severide risks getting in big trouble when the Chief orders everyone to take a drug test.
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After seeing the remains of a victim crushed by a train, Peter is shocked and considers leaving the station. Gabriela attracts her superiors' wrath again, when she accuses a mother of poisoning her daughter. Kelly's addiction to painkillers spirals down, Leslie is confronted by Clarice's husband, and Mouch is very unfriendly to some Canadian visitors.
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After inhaling magnesium shavings at a fire, Vargas gets a severe pulmonary injury, forcing him to retire from his job. Chief Boden fears that 14-year-old Ernie is behind several recent dumpster fires. Cruz's attempt to get his little brother out of a gang backfires. On a lighter note, Gabriela asks Matt to come over and repair her window, while Severide receives a dinner invitation from Renée, a very attractive woman that he saved from a car accident.
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An Internal Affairs investigation is launched when a woman accuses the firemen of stealing a diamond necklace from her home during a kitchen fire. The lead investigator is an old foe of Casey's. The Chief interrogates Shay and Dawson about some narcotics that went missing from the ambulance. Joe Cruz is faced with a big moral dilemma while trying to get his little brother out of a gang. Gabriela asks Matt out on a date, and things heat up between Kelly and Renée.
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In order to help her brother, Gabriela contacts an old enemy, even though this could ruin her friendship with Casey. Herrmann retaliates when Arthur, the silent partner from the bar, attempts to intimidate him. Leslie and Clarice try to avoid a custody lawsuit with Daniel. Severide tracks down his ex-fiancée, and Casey confronts his mother about the reason why she killed his father. The firehouse responds to a drowning kid and a collapsed house. Written by
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To make up for the crushing feeling of guilt, Cruz becomes overzealous at work, to the point where he puts a colleague's life at risk. Otis, Herrmann and Gabby find a hidden safe in their bar. Kelly finally confronts Renee Whaley. Casey meets with his sister to decide what to do about their mother, who has been acting quite recklessly. Meanwhile, Leslie struggles to prove she could be a fit mother to Clarice's baby, but to make matters worse, a homeless man sticks her with a needle, possibly exposing her to HIV. Written by
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After her break-up, Shay decides she wants to have a baby by herself. Gabby, Herrmann and Otis track down the owner of the box they found in the safe. At the scene of an accident, Peter Mills bravely talks a man out of suicide. Later, at the annual Academy Dinner, Gabby and Peter come out as a couple, Gabby overhears Benny Severide reveal a big secret about the death of Peter's father, and Andy Darden's widow surprises Casey. Written by
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Casey is angry that Mills has been spending a lot of time with the Squad members and neglecting his Truck duties, but Peter believes Matt might be jealous on him and Gabby. While Herrmann is away hunting, his wife Cindy has a pregnancy complication. Shay and Severide have their first big fight as future parents. Tara, the new paramedic candidate, starts shadowing Shay and Dawson, but she doesn't seem to have what it takes for the job. She does however have a shocking surprise for Severide. Someone from Casey's past makes a comeback. Written by
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Severide has to face the consequences of Tara's accusations and the firehouse is ordered to attend a sexual harassment sensitivity seminar. Mills does a great job rescuing a man from an overturned tanker, which raises Hadley's envy. Shay and Dawson need to get past a poisonous snake in order to reach its victim. Matt and Hallie reunite, only to find out that their old nemesis Voight has been released from prison. Written by
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Severide decides to look into Tara's past to find evidence that would help him fight the criminal charges she filed against him. Peter asks Gabby to move in with him, but she feels burdened by the secret she's been keeping about his mother. A little girl with a special connection to the firehouse lights everyone's spirits up. The calls of the day include a collapsed apartment building, a car accident and a lightning victim. By the end of the shift, a personal tragedy hits one of the team members. Written by
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In the wake of Hallie's death, Casey must join forces with Sergeant Voight and his team in order to track down her killer, even though it means putting his own life in danger. Peter is still shaken after Gabby's confession and that might hurt their relationship. Leslie is very excited as she's about to get inseminated. Also, while preparing for the grand opening of Molly's, Otis convinces his partners to let him hire his Russian cousin as a waitress. Written by
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Internal issues threaten to derail Engine Company 51.
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While out on a jog, Severide (Taylor Kinney) comes across a secluded and empty construction site and encounters a young boy who has been trapped in a backhoe loader and is in dire need of assistance. Boden (Eamonn Walker) and McLeod (Michelle Forbes) continue to butt heads about the future of the firehouse and Boden breaks news about his future to Casey (Jesse Spencer). Meanwhile, it's election day for the union presidency and Mouch (Christian Stolte) and Greg Sullivan (guest star Eric Slater) have a debate on Otis' (Yuri Sardarov) podcast. With rival bar Game Day's future in peril, the finger is being pointed at Molly's.
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When a tanker collides into a commuter train that subsequently crashes into a warehouse, the firehouse is called to the horrific scene that tests everyone to the limits as life and death hangs in the balance. With the ultimatum in place for him or the firehouse, Boden (Eamonn Walker) is tasked with making life-changing decisions regarding his future. Severide (Taylor Kinney) learns more about Katie (guest star Brittany Curran), the young woman he saw with his father (guest star Treat Williams). Meanwhile, Shay (Lauren German) and Dawson (Monica Raymund) are still at odds and Casey's (Jesse Spencer) responsibility of being a surrogate father takes a sharp turn.
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When the shooting of a young girl happens in their neighborhood, Cruz (Joe Minoso) and his brother, Leon (guest star Jeff Lima) are forced to think about the gang they have tried to escape. The battle between Chief Boden (Eamonn Walker) and McLeod (guest star Michelle Forbes) continues to escalate and Isabella (guest star Mena Suvari) convinces Mills (Charlie Barnett) to dress up for a fancy gala. Meanwhile, Lt. Casey (Jesse Spencer) is sad Dawson (Monica Raymund) won't be coming by as much now that his parental duties are over, Shay (Lauren German) is fed up with the firehouse and digs in deeper with Devon (guest star Vedette Lim) and Zoya's (guest star Larisa Polonsky) visa is expiring, prompting her to come up with an idea.
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Battalion Chief Boden (Eamonn Walker) prepares to counterattack McLeod (guest star Michelle Forbes) in a final effort to save the firehouse from closure and the romance between Dawson (Monica Raymund) and Casey (Jesse Spencer) escalates. Leon (guest star Jeff Lima) is making progress in the gang murder investigation, but Cruz (Joe Minoso) cannot stand being left in the dark by Voight (guest star Jason Beghe), fearing for his brother's safety. Meanwhile, Severide (Taylor Kinney) and Katie (guest star Brittany Curran) bond to make up for lost time and Otis (Yuri Sardarov) feels uncomfortable living with Severide and Shay (Lauren German) after Devon's (guest star Vedette Lim) latest escapade.
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All seems lost with firehouse 51 on the verge of closing its' doors, thanks in no small part to Gail McLeod (guest star Michelle Forbes), but Chief Boden (Eamonn Walker) and the rest of the house refuse to allow themselves to sit by and let it happen. An emergency call to an apartment structure fire tests everyone's limits and puts the squad in harm's way. Meanwhile, Dawson (Monica Raymund) receives some life-changing news and union president Greg Sullivan (guest star Eric Slater) makes headlines, which has an immediate impact on Mouch (Christian Stolte).
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Lt. Casey (Jesse Spencer) returns to work at Firehouse 51 after nearly being killed in a building collapse and Shay (Lauren German) meets Allison Rafferty (guest star Christine Evangelista), her new partner, who is friendly to everyone except her. Dawson (Monica Raymund) begins her rigorous training at the Chicago Fire Academy, while Lt. Severide (Taylor Kinney) prepares for his stint as instructor. Meanwhile, Clarke (guest star Jeff Hephner) stubbornly does not speak with the police about the murder in which he is the prime suspect and the future of Molly's looks bleaker than ever.
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Lieutenant Casey (Jesse Spencer) tries to convince himself and everyone around him that he is one hundred percent healthy following his near-death incident in the line of duty. Shay (Lauren German), not wanting to delve into the emotionally traumatic incident, continues to elude a lawyer who wants to speak with her about Daryl's suicide. Meanwhile, Otis (Yuri Sardarov) and Katie (guest star Brittany Curran) bond over board games, Boden (Eamonn Walker) helps out a woman (guest star Melissa Ponzio) with a negligent landlord and Dawson (Monica Raymund) notices fellow recruit Rebecca Jones (guest star Daisy Betts) undertaking some interesting test-taking techniques at the Academy.
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When a drunk driver knocks down a transformer, the entire neighborhood is left without power on a frigid Chicago night and members of Firehouse 51 step up to lend their much needed help. While many from the community ride out the night at the station, in the midst of such close quarters, romances speed up and tempers flare. Meanwhile, Casey (Jesse Spencer) continues to lie to both himself and Dawson (Monica Raymund) about his condition and the stakeholders in Molly's bicker about the bar's direction.
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Severide (Taylor Kinney) feels sidelined as he leaves Detective Lindsay (guest star Sophia Bush) and the Intelligence Unit to do their job and locate his sister Katie (guest star Brittany Curran). Shay (Lauren German) gets an unusual tip from Chicago Blackhawk players Brent Seabrook and Duncan Keith, who makes friends with Clarke (guest star Jeff Hephner) and stop by Molly's. Meanwhile, Casey (Jesse Spencer) learns more about his head injuries after another close call and Dawson (Monica Raymund) pushes hard to pass the physical test at the Academy.
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Severide (Taylor Kinney) is getting impatient with the police as Vince Keeler (guest star Jake Weary) walks free. Meanwhile, the house pulls out all the stops to save a girl trapped inside a donation bin, Mouch (Christian Stolte) learns that Boden's (Eamonn Walker) secretary Connie (gust star DuShon Brown) is not someone to mess with and the squad and truck are called to a serious high rise fire inside a 20-story downtown office building.
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Lt. Severide (Taylor Kinney) hits the top of the list as Det. Lindsay (guest star Sophia Bush) starts calling in suspects with the clearest motives to make the guy who kidnapped Katie disappear. Meanwhile, Jones (guest star Daisy Betts) is still having trouble fitting in as word of her disruptions reach the fire department's headquarters. Elsewhere, Herrmann (David Eigenberg) celebrates his twentieth anniversary with his wife, but no one supports his idea on the gift he intends to give.
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Lt. Severide (Taylor Kinney) is reminded of his own past by a man he saves from a car accident (guest star W. Earl Brown) and feels compelled to help him. Elsewhere, Lt. Casey (Jesse Spencer) and Chief Boden (Eamonn Walker) grapple with how to dock Jones (guest star Daisy Betts) per her father's orders. Meanwhile, Mouch (Christian Stolte) and Dawson (Monica Raymund) have troubles with the opposite sex and an emotional call to duty creates ripples throughout Firehouse 51.
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Lt. Severide sticks his neck out for Dave Bloom, a fellow firefighter from Denver who is troubled by addiction. Elsewhere, Dawson and Shay leave town for a "girl's weekend" at a cabin in the woods. Meanwhile, Jones struggles with the knowledge that her father is pressuring Chief Boden about her career path and Mouch's Internet dating profile gets an upgrade with the help of Mills and the guys.
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A suicide note is delivered to a surprised Dawson (Monica Raymund) and Lt. Severide (Taylor Kinney) digs deeper into Bloom's (guest star W. Earl Brown) dark past. Elsewhere, Chief Boden (Eamonn Walker) learns shocking news, and with the help of Shay (Lauren German), Lt. Casey (Jesse Spencer) goes on the search for a life-changing item.
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Boden forces members of Firehouse 51 to pull themselves back together in the aftermath of a harrowing fire explosion. While Severide goes missing for one week too many, Casey works to track down his whereabouts. Meanwhile, Newhouse brings some unexpected news regarding one of Mills' relatives while Herrmann and Otis make some new goals regarding Molly's.
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Lieutenant Severide returns to Firehouse 51, but he is clearly not his usual self. Dawson counts down the weeks until she gets started as a candidate at the Austin Firehouse. Meanwhile, Mills learns more about his father's family and Herrmann asks the potential Molly investors to come up with new ideas to turn the business around.
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Truck 81 goes out on a call and Truck 66 also goes. Knowing that whoever gets there first will be in charge, Cruz wants to step on it but Casey tells him no. But when they and the other truck crash, one of the other team's members is in critical condition. An initial investigation hints that Cruz was careless. And Walsh and his men are blaming Cruz for the man's condition. When Mills has a fainting spell, Severide tells him to see the doctor. Boden tells Mills that it was his father's wish to reunite with his family. Boden tells Casey there could be a way for Dawson to join the squad but will require a sacrifice on their part.
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Dawson tries to strike a balance with Casey during her first day as a candidate. Meanwhile, Mills ponders an uncertain future; Severide faces his demons; and a city inspector visits Molly's. |
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Casey continues to battle his sister's husband over giving her a fair settlement. But he finds ways to keep Casey at bay. So Casey turns to Newhouse for help. Newhouse asks Mills help with a side job he has but someone shoots at them while he's doing it. When they save a boy, children's services shows up and takes the boy away from his mother. It seems like she has a history of abuse and neglect. The mother pleads with Brett to help her. Severide warns her not to get involved. But she convinces him they have to try and they learn she might be straight so they go to child services but the one in charge says he's too busy. Dawson finds herself being told by Hermann she needs to put in more and she does which causes her to feel like she's never going to be accepted.
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During a house fire, Firehouse 51 rescues the owner from the cellar clutching a suspicious box, leading Lt. Severide to bring in Sergeant Voight and Detective Lindsey for further investigation. |
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Dawson and Casey's relationship is tested as the team responds to a truck leaking hydrochloric acid in a busy intersection. Severide learns about Brittany's past. Mouch has dating troubles. |
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A house fire puts a couple in danger; Dawson and Casey are pushed further apart by an unsettling surprise; the Chicago Holiday Fest gives Molly's II a chance to shine; the Chicago FD Chaplain hopes to help out a local soup kitchen with "fill the boot" donations.
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Severide and Dawson discover startling evidence found at a storage unit fire that appears connected to the fire that took Shay's life. Meanwhile, the firehouse bands together when Chaplain Orlovsky is the victim of a bad car accident. |
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More clues emerge about the fire that killed Shay, leading Severide to a former nemesis; Shay's sister visits; Cruz is faced with a surprise; Boden tries to help his father. |
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An ice storm hits, forcing a citywide lockdown. Mills and Brett are left stranded in the elements while searching for a teen...
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In an effort to further cover himself from any wrongdoing, Pridgen will enlist the help of Lt. Welch, who is faced with the choice of whether to fit in with the firehouse or follow his superiors self-serving orders. Elsewhere, Mouch is going to be floored upon learning that his donation to a fertility clinic has resulted in a child who, now a young adult, wants to meet him. In the meantime, Brett and a reluctant Cruz are going to take Dawson out on a double date and Boden will focus his efforts on his duties at home as a father.
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Severide's old friend arrives, hoping for a second chance with the Chicago Fire Department. Meanwhile, Mills tries to regain his active squad status, Mouch confronts his fear about meeting his child, and Brett and Dawson set out to have a big night out.
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Herrman tries to rescue a toddler from a structure fire; Mills discovers unexpected news; Brett and Cruz's relationship reaches a critical juncture; Otis is surprised by some feelings that develop.
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Members of Firehouse 51 transport victims of a gas leak to nearby Chicago Med; an armed patient claiming to be carrying a deadly airborne disease forces Chicago Med into lockdown.
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Mills is back on squad. His sister and mother show up and tell him that they've decided to move to North Carolina and run the restaurant his grandfather left them. They want him to join them. Casey continues to do renovation work at a strip club and the owner makes him an offer that he doesn't like. the Chaplain talks to Cruz and Otis about Hermann's coaching of the PeeWee hockey team because of the upcoming championship. And Kelly goes to see April and sees that she's going away for awhile.
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An apartment fire connected to a case of rape and attempted murder resembles an unsolved case in New York, so Sgt. Benson of Special Victims Unit comes to Chicago to help Intelligence with the investigation. |
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At Sgt. Voight's urging, a determined Lt. Casey agrees to go undercover in an effort to provide proof of Jack Nesbitt shady dealings...
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Casey finds himself in dangerous territory at the center of an undercover operation to bring down a trafficking ring out of Nesbitt's strip club. |
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Boden's job is on the line as the crew of Firehouse 51 continues to search for evidence that could clear him of any wrongdoing. |
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Boden offers to host a wedding at the firehouse after a fire ruins the ceremony, but Chief Riddle is against it and his political aspirations cause friction among the firefighters. |
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While a member of Firehouse 51 falls victim to a near-fatal stabbing, the other firefighters rescue a woman who attempted to commit suicide. |
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Herrmann goes to court to testify against Freddie but when the perpetrators father reaches out to beg forgiveness for his sons malicious attack...
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Mysterious threats begin to emerge throughout Chicago and the situation gets worse when news of a mass shooting brings Firehouse 51 into a dangerous scene. |
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Casey begins his campaign and is approached by someone who represents people who want to support him. The team responds to a call at another firehouse wherein one of them is an accident while trying to do an exercise. After helping him, Cruz overhears the fireman who was with the man who was injured telling what happened. Cruz then tells Severide the story he told doesn't jive with how the equipment was set up. Severide says he knows the man and says he's a good man but Cruz won't let it go and a new guy tells them he was at that station and says the two men were butting heads. Severide decides to pursue it which causes the brass to come down on them. Boden informs Borrelli that he is being bumped off the team for someone with seniority.
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With election approaching Casey's opponent tries to fling a little mud on him by saying he intends to continue working for the fire department even if he wins, in other words, he's going to be double dipping. Which to the Chief coming to the station and questioning Casey's intentions which leads Casey to promise he's done campaign but when his opponent schedules a debate, Casey finds himself in a precarious position. And when the squad goes a reported gas leak, they find the remains of a child in the chimney. They break it to get to it. Later a detective shows up to tell Severide because of what he did, the evidence was compromised. She then shows him crime scene photos and Kelly thinks he knows who the child is--a child who went missing a few years ago. Problem is that the child went missing at a location far from the house. The detective wants to be sure but Kelly goes to see the girl's mother to tell her that he might have found her daughter. And the detective tells him because of ...
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Severide watches over Detective Holloway's son while she testifies in court as part of an undercover operation, but he's left to deal with the situation due to an unexpected turn of events. |
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When the team responds to a fire at a house, Dawson finds a boy and he's hesitant to go with her but he eventually goes with her. And he refuses to let her go so she goes with him to the hospital and she finds out that he's a foster child and his guardian is seriously injured so he ends up in a state facility and Dawson is worried about him. Severride was nearly trapped in the house because he thought someone was in the house but there wasn't so he tells Boden if they have a new type of mask they can tell if there is someone in a fire. But Boden says the Chief says it's not in the budget, so Casey tries to find a way to get it. Stella and Hermann have a dispute about the ice they use at Molly's. And when Cruz learns about Otis avoiding getting tested, he decides to turn to the one person Otis can't say no to.
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Dawson is determined to be approved a s a foster parent so she can take in Louie, the boy she saved. And Casey is not exactly supportive. Borrelli's brother, also a fireman asks him to ask Casey to help with a business venture. Kelly advises not to. Otis, who is still on leave, drops by the station and when he sees the guy filling in for him, he's worried that they will want him to stay on.
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Borelli is still dealing with his brother's death and wondering if Boden is at fault. Dawson tries to find a new place so that she can be made Louie's new foster mom. Stella learns her ex has fallen off the wagon and tries to help him. Casey goes to an Alderman conference and Susan goes with him.
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Members of 51 end up in a dangerous situation while responding to an auto accident and Stella must make a serious decision about her ex. |
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As per his duties as Alderman Casey visits a warehouse and while there, there's an accident wherein chemicals get spilled all over the place and a toxic gas covers the place and Casey and some people take refuge in an office but the gas, is leaking in and when there's an electric spark, it ignites the gas. Casey tries to find a way out. Dawson goes to a report of a woman having some kind of coronary. She wants to bring her to the hospital but an advocate stops them. Later they go there again and this time Dawson takes her over the advocate's objections.
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Casey and Severide disagree on a potential arson case when the squad fails to save a woman from her burning house. |
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Dawson hits a pedestrian while responding to a call. Casey and Severide continue to investigate an arson case while Chief Boden is in New York to attend an important function. |
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Casey and Dawson are informed that they can adopt Louie if they want to. Casey notices a man following them. Severide decides to make some changes in his life. And Jeff Clarke offers him a proposition. Otis learns that Molly's is reaching a milestone and implores Hermann to celebrate it in a grand manner. They make all sorts of preparations but Hermann discovers a secret about Molly's that would ruin it.
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After being approached by a man claiming to be Louie's father, Casey and Dawson explore their options. The team finds a discarded ping pong table and being it to the station hoping it could be relaxing but instead it becomes a source of disruption. Kelly agrees to be a bone marrow donor but it has an effect on him that leads him to drink and because of it, he finds himself being sought out by the police.
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Louie's father throws a wrench into Casey and Dawson's family plans. Severide agrees to a bone marrow donation but a work accident throws everything into flux. Casey and Dawson try to find harmony at home. Meanwhile, Otis and Mouch decide to film a PSA encouraging people to join the Chicago Fire Department but hit a creative wall in the process.
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Casey and Dawson are reeling from Louie's departure. Casey takes it out on everyone at the station. When Dawson goes on a call about a girl who's on a school trip who collapses. When She examines her, Dawson tells the girl she's in labor. She gives birth and is brought to the hospital. When her father learns what happened he tears into and Dawson tells him to back off. Someone later tells her, she was hasty to react the way she did. And Kelly goes to see Anna.
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The team is on high alert when a previous incident during a fire call leaves a dangerous man on the loose with a vendetta to target Lt. Casey and Firehouse 51, and prompts CPD to step in. Dennis Mack, a buddy firefighter of Severide's father, comes to town to shadow the squad but may have ulterior motives. Meanwhile, Brett and Antonio's relationship hits some bumps in the road when his ex-wife Laura surfaces and Casey has a present for Dawson.
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When truck and squad are summoned to the scene of a dangerous accident, Chief Boden makes a split-second decision that overrides Chief Anderson, the incident commander whose house was the first to respond to the call. Feeling his authority was undercut and his reputation damaged, Anderson uses his power to make things miserable for Boden and all of House 51 feels the repercussions. Meanwhile, Severide contemplates a major life-changing decision, Herrmann does a good deed and Brett looks to make some personal changes to herself.
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After exercising his disdain and authority over Chief Boden, Chief Anderson reassigns members of 51 to various houses around town, citing the need for improvement. The ramifications are felt by the crew, who are left to make the best of their respective situations in their new surroundings. Boden fights to repair the situation, but it just might be out of his control. Elsewhere, Severide toils over an important decision.
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Truck and squad are called to aid in a massive all-city response when an old, ill-equipped factory-turned live/work space quickly turns into a firestorm, trapping countless unsuspecting victims. The dire situation quickly turns personal when it is discovered that one of Chicago PD's own has a family member at the scene. With the rescued victims in need of serious medical attention, the doctors and nurses of Chicago Med are tested as the major influx of patients are brought through their doors. Meanwhile, in the aftermath, the building owner steps forward to cooperate with the ongoing investigation, but the situation takes a sudden and unexpected turn.
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When similar car accidents uncover the fact that someone may be targeting innocent people, a determined Dawson takes matters into her own hands to help push things along, meanwhile Casey tends to his Alderman's duties. |
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Casey discovers a new crack house on the block that is harboring a female junkie and goes to extreme measures to remedy the situation. Dawson and Brett get assigned a new trainee for the shift and the newbie gets the two in trouble when he surprises them during a harrowing call. Meanwhile, Severide gets an unexpected visit from his father, Benny, and Herrmann deals with family issues when his son Lee Henry gets into trouble at school.
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Cruz finds himself in a bad spot when an off-duty incident begins to unravel, prompting Mouch to step in and offer help in hopes of avoiding serious consequences from the CFD. Casey goes head to head with a big politician to get his measure for first responders passed. Lt. Severide makes life difficult for newest team member Jason Kannell and Dawson gets an unexpected visit from her father.
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A dangerous warehouse fire puts truck and squad at risk. Tensions rise for Dawson and Casey as Dawson's father overstates his welcome at their home. |
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With most of the squad still trapped in the warehouse fire, Chief Boden makes a risky last-minute decision to save them. |
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When Boden learns that the school fire in which his wife was trapped was not an accident, he pressures Severide and Casey to find the cause. |
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Lt. Casey gets off on the wrong foot with Sam Mullins, a temporary Chief who is filling in for Boden at House 51 for the morning. When Casey later makes a risky move in an attempt to save a distraught man from jumping off a building, Mullins has a surprise that Casey does not expect. Mouch flies in Cruz's brother Leon as a birthday surprise, but the rest of the squad struggles to keep it a secret. Meanwhile, Brett is caught off guard when she learns new information about her hometown friend Hope.
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While running a secret errand, Dawson finds herself trapped in a collapsed parking structure; pressure mounts on Casey as he begins taking on additional duties; Kidd grows increasingly skeptical of Hope. |
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Casey and Severide find themselves at odds after Casey argues with him over the best way to save a teenager entangled in barbed wire. When Casey looks to Boden for help smoothing out the situation, he comes to the realization that he will have to fix it himself. Elsewhere, Otis tries to convince Casey to participate in the beta test for an expensive piece of new firefighting equipment imported from Japan. Meanwhile, Kidd and Hope come to blows over a payroll issue and Brett goes on a date with a doctor she meets during an ambo call.
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Kidd is surprised to discover she is being transferred out of the firehouse; Severide and Casey are suspicious and investigate; Otis and Herrmann discuss taking over a rundown bar; Dawson's frustration with her father reaches a boiling point.
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Brett attempts to make a lifesaving decision in the field to someone near and dear to the firehouse family. In an effort to impress Lily, Otis scrambles to get everything together for the grand opening of Molly's North. Meanwhile, Boden becomes emotional following the rescue of a famous blues player from a burning apartment building and Dawson struggles to come to terms with how she has been dealing with her father.
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After saving a young girl, Dawson is forced to make a tough decision when she finds out the girl's father is addicted to painkillers. Herrmann loses his cool and gets into an altercation with a police officer after responding to a call. Otis and Cruz are on a mission to find out who Brett is dating. Meanwhile, Boden is skeptical when Donna's brother Julian unexpectedly comes to town.
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After learning unsettling news, Dawson enlists Severide to help her out. Elsewhere, Casey and Dawson struggle with communication issues while Brett and Kidd compete to win the heart of Zach, a Hazmat officer. Meanwhile, Otis, Herrmann and Mouch are on a mission to locate the source of a horrible stench that is making life unpleasant at Firehouse 51.
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Dawson and Casey do everything they can to locate Bria's whereabouts after discovering important new information. Lt. Severide reunites with Chief Grissom, and old family friend. Meanwhile, Cruz enlists the help of Brett and Mouch to create a new tool and Kidd and Zach go on a date.
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After responding to a time-sensitive rescue, Casey and Severide don't see eye to eye on the best course of action. Herrmann struggles to entertain his daughter on "bring your child to work day." Brett is joined by a surprise guest during a spa getaway, courtesy of Dawson, while Kidd's social life gets a boost.
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The photographer whose pictures of Casey and Severide during a rescue make the front page of the newspaper chronicles a day-in-the-life story at the Firehouse.
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Otis and Kidd respond to a call involving a residential fire only to head into danger when gunfire goes off in the house.
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The members of Firehouse 51 come to terms with one of their own being injured and deal with the temporary replacement.
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Boden has a lapse in judgment in the aftermath of rescuing a young boy. Kidd struggles to win the approval of Severide's mom after a surprise visit and Otis takes on new responsibilities at the firehouse.
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Casey and Severide assist the FBI with an undercover mission; Kidd tries to help Severide come to terms with recent developments.
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Casey grows skeptical of Cordova when a large amount of money turns up missing at the property of Mexican drug cartel.
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Severide is surprised when Rene Royce returns to the firehouse; Casey helps Chief Boden in his latest pursuit; Kidd regrets a decision regarding Severide; Herrmann disagrees with Lt. Colan Nino over how to coach their son's basketball team.
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Boden takes a big step in the pursuit of a major career decision. Kidd becomes increasingly distrustful of Renee's motives with Severide. Herrmann has trouble bouncing back after a tragedy.
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Boden's chances for a promotion are met with potential complications, leading him to take matters into his own hands. Dawson and Casey don't see eye to eye on an important decision, while Kidd finds herself struggling to find time with Severide. Brett and Dawson respond to a tough call that quickly turns dangerous.
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Boden becomes skeptical of Gorsch's motives; Severide gets involved in a difficult situation following a child's rescue from a car wreck; Foster is tasked with giving Cruz personal advice.
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Casey investigates the cause of a trailer park fire; Boden reaches his breaking point; Mouch, Herrmann and Cruz wonder why Molly's isn't living up to expectations.
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Gorsch takes over Boden's morning meeting at Firehouse 51 and goes out on calls in his place; Brett and Foster respond to a call about a Halloween prank getting deadly serious.
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A car pile-up impacts someone dear to the firehouse family. Brett and Foster encounter a harrowing call while Kidd and Severide find their relationship being tested.
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Casey and Naomi escape a deadly fire in his apartment. Brett puts together a team to create a community fire safety presentation but they struggle to make it engaging. Severide and Kidd are at a crossroads.
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Foster faces blowback after pointing out a doctor's oversight. Brett helps Casey look for a new apartment. Kidd prepares Tuesday the Dalmatian for the Fire Safety Dog Competition. A serious accusation is leveled against Severide.
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When the firehouse is called to a motorcycle crash, Casey and Severide sense that the details don't add up. A rift develops between Mouch and Otis. Brett, Foster and Kidd work to secretly fix a dent in the ambulance bumper.
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Cruz leads the charge in getting the firehouse to gear up for the Polar Plunge. Herrmann has a hard time bouncing back after dealing with a tough call. Foster's personal relationships begin to interfere with her job.
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Brett, Foster and Kidd take a road trip to Indiana and encounter an accident involving a boys' hockey team that leaves them scrambling and relying on their instincts to save the injured. The rest of Firehouse 51 competes in the annual chili cook-off.
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A spate of robberies comes to light after a firehouse lockbox key goes missing. Sergeant Hank Voight suspects a firefighter may be involved, and with Boden's support, he recruits Cruz to go undercover to help sniff out any suspicious activity.
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Casey struggles after experiencing a narrow miss on a call. Otis wins a unique sporting opportunity in a raffle. Grissom turns to Severide for assistance when the mayor's office sends a task force to Firehouse 51.
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Tensions run high between Casey and Herrmann after the firehouse responds to an apartment complex fire. After discovering something extremely suspicious during the call, Kidd and Severide do some investigating and get CPD on the case.
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Severide gets angry at Cruz when he feels his orders were disobeyed in the field. Boden reconnects with an old high school friend during a call to a house fire. Herrmann has issues when one of his favorite knick-knacks from Molly's goes missing.
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A horrible storm wreaks havoc on Chicago and impacts Firehouse 51 when the power goes off. A little boy mysteriously shows up at the station and everyone works together to uncover who he belongs to. Foster and Kidd argue about Severide.
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Severide and Boden search to uncover whether arson was the cause of a fire at a hair salon. Mouch, Herrmann, Otis and Kidd make a startling discovery while tracking down the missing piercing nozzle from Engine 27.
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A serial arsonist cold case is reopened when Lt. Severide finds a connection to a recent salon fire. Firehouse 51 celebrates a retirement party.
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Severide and Kidd continue to investigate Benny's old arson case. Unexpected news leads Brett to ponder a big decision. All hell breaks loose.
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The mattress factory fire spirals out of control. Truck and squad lay it on the line in hopes of getting the trapped victims out alive.
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Casey struggles to get Boden to sign off on an energetic new recruit; Foster extends an olive branch to her irritating new medic; Otis inspires Herrmann to seek new partners at Molly's.
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Brett and Foster question the suspicious circumstances surrounding an attack at a juvenile detention center; new technology at Firehouse 51 tests everybody's patience; Kidd is chosen to represent the district at a leadership conference.
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A deadly bacteria takes its toll on numerous victims around the city, leaving Chicago's finest first responders to work together alongside the CDC to resolve the dangerous situation; Severide suspects something bigger is happening.
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Kidd must prove herself at the National Firefighter Leadership Conference, while the rest of Firehouse 51 is called to two eerily similar car wrecks. Mouch tries to keep the firehouse informed by starting a newsletter. Cruz deals with a heartbreak.
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Cruz and Severide suspect foul play when a fire started by an elderly woman turns deadly. Kidd, Foster and Brett create a women's-only lounge. Firehouse 51 celebrates some good news.
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Severide must make a tough decision about the future of his career at Firehouse 51. Herrmann deals with the consequences of his temper after a run-in with a Chicago police officer. Cruz is excited to demonstrate the Slamigan at the Firefighting Expo. Commissioner Grissom returns.
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Severide begins his assignment at the Office of Fire Investigation and gets off on the wrong foot when, despite his orders, he reopens an old case. When the cause of an apartment fire hits close to home, Herrmann is on a mission to get to the bottom of it. Kidd finds herself burning the candle at both ends.
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An unexpected visit throws Casey for a loop. Severide sets out to exonerate a wrongly convicted arsonist. Kidd pays the price for burning the candle at both ends. Cruz goes on a mission to fix one of Otis's old toys.
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Members of Firehouse 51 are dismayed to learn their boundaries have been redrawn to overlap with an adjacent station and problems quickly arise. Casey and Gallo hunt a missing piece of equipment. Brett and Foster find themselves at odds. Mouch tries the find the recipient of a mysterious letter he discovers.
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A pest control problem forces the 51 team to temporarily bunk with Firehouse 20. All under the same roof, Casey clashes with Capt. Delaney while Foster, Kidd and Brett fear Capt. Leone has it out for them. Boden mulls a procedural overhaul.
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A series of false alarms at a private school hinders the firehouse's ability to respond to legitimate emergency calls. Kidd asks for ideas to surprise Severide on his birthday. Cruz and Brett rent out their extra room, but the new tenant is more than they bargained for.
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The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51. Boden and Severide are asked to make peace with an old foe for the greater good. Brett receives family news while Foster plans a party with friends.
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A series of mysterious gas leaks has members of Firehouse 51 puzzled and spread thin. Brett's conflicted when her birth mother gets serious about tracking her down. Severide misunderstands his role as Cruz's best man. Mouch bites off more than he can chew.
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A series of teen Opioid overdoses sees Severide partner with Sean Roman, but begins to suspect there's more to the story than his old friend is telling him. Casey tries to be there for Brett as she considers her birth mother's offer to meet.
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Boden is on edge after starting a new fad diet. Casey and Severide disagree on a call. Brett's birth mother shares life-altering news. A familiar face has a proposition for Herrmann.
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Things get personal for Casey and Gallo in the aftermath of a suburban house fire involving a mother and her young son. Herrmann campaigns for more respect. Kidd has an idea for giving back to her community.
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Lt. Severide teams up with Seager and the OFI when a motel structure fire turns suspicious. Firehouse 51 members become amateur sleuths following a Reddit post involving one of their own. Brett continues to get invested in her birth mother, Julie.
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Tension builds when a group of rabble-rousers attempt to lock down the firehouse. Brett is faced with a monumental decision. Cruz readies himself for a big day. Gallo and Ritter attempt to launch Firehouse 51 into the social media age.
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When one of 51's own gets injured on a call, Lt. Severide becomes obsessed with helping out. Foster contemplates a big decision. Kidd is concerned for one of her high school trainees.
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As Firehouse 51 welcomes a new member to the team, whose presence could provide some complications, Brett's leadership shines during a scary call; Boden sees great potential in Kidd and proposes an idea that could have lasting repercussions.
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Brett and Mackey find their lives in peril. Casey and Brett tread in unfamiliar territory. Severide chases a memory while Kidd adeptly solves a firehouse problem. Ritter puts himself in harms way during a harrowing call.
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A mishap on the aerial ladder in the midst of a fire leaves Mouch shaken and questioning his abilities. Kidd looks for support from Severide while Casey and Brett discuss their future.
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While completing a task assigned by headquarters, Boden makes an unforeseen connection. Gallo's forced to make a surprise rescue to one of their own when the firehouse is called to the site of a construction explosion. Mouch reignites an old feud.
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When Firehouse 51 is called to the scene of a dangerous blaze inside a 10-story storage unit, Herrmann and Cruz find themselves trapped inside a freight elevator with all communications cut off.
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Gallo makes a split-second decision during a dangerous fire rescue leaving Casey steaming that his direct orders were not obeyed. Kidd feels a strain in her relationship with Severide. Brett and Mackey find themselves searching for answers following a series of suspicious calls.
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Casey and Severide investigate a suspicious fire at a homeless encampment. Cruz is shaken by a close call. Ritter bonds with a victim. Sylvie flirts with Grainger.
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A call to a familiar location brings back mixed emotions for Severide; Herrmann heads out for a vacation; Casey is not thrilled with his replacement
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