Casey makes a life-altering decision; Gallo, Ritter and Violet agree to an interview and photo shoot; Brett and Mouch launch the paramedicine program; Cruz comes closer to fatherhood.

A mysterious caller who is in danger relies on Kidd to help save her and her brother; the firehouse helps Cruz get ready for fatherhood.

A fire breaks out at a pet food factory, and Casey and Severide help the owner, Pete, get to the bottom of it; the annual garage sale takes place at 51 and everyone is on edge.

Severide and Casey try to find the best fit for Kidd; Ritter, Gallo and Violet help plan an event for Mouch.

The firehouse reacts to some exciting news; a mysterious stranger arrives, and a shocking call takes Severide's breath away.

Firehouse 51 deals with the aftermath of the capsized boat rescue; Gallo, Ritter and Violet discuss plans for a side gig.

A video of Casey from the roof rescue goes viral; Mouch sets up a Little Free Library at Firehouse 51; Herrmann breaks protocol.

An elite California lakeside community is shaken when two well-to-do gentlemen go to war over a one-inch property line discrepancy; one neighbor takes the dispute to new heights when he hires a hit man to solve the problem permanently.

When Lanell Barsock is found murdered, it seems obvious to all that her boyfriend did it; when the forensic evidence comes in, investigators are astonished to learn they've arrested the wrong person.

A member of Team One has a secret that could compromise the assignment and ruin Wordy's career.

An elite California lakeside community is shaken when two well-to-do gentlemen go to war over a one-inch property line discrepancy; one neighbor takes the dispute to new heights when he hires a hit man to solve the problem permanently.

When Lanell Barsock is found murdered, it seems obvious to all that her boyfriend did it; when the forensic evidence comes in, investigators are astonished to learn they've arrested the wrong person.

A member of Team One has a secret that could compromise the assignment and ruin Wordy's career.

An elite California lakeside community is shaken when two well-to-do gentlemen go to war over a one-inch property line discrepancy; one neighbor takes the dispute to new heights when he hires a hit man to solve the problem permanently.

When Lanell Barsock is found murdered, it seems obvious to all that her boyfriend did it; when the forensic evidence comes in, investigators are astonished to learn they've arrested the wrong person.

A member of Team One has a secret that could compromise the assignment and ruin Wordy's career.

A major security breach in the city's computer networks forces Firehouse 51's senior leaders to take matters into their own hands; Severide gears up for an arson investigation.

Gallo clashes with the new lieutenant temporarily filling in for Casey; Severide closes in on a dangerous and deadly arsonist.

Severide and Herrmann clash over office space; Boden looks at Pelham's past as he considers making him permanent; Gallo's resentment of Pelham comes to a head; Brett and Ritter force Violet to confront her true feelings for Gallo.

Gallo, Violet and Ritter debut their microbrewery business at Winterfest; Brett prepares to present her paramedicine program to an oversight panel; Firehouse 51 gets in the holiday spirit.

Stella Kidd returns to Firehouse 51; the team must work together to put out a potassium fire in a tunnel; after that incident, Ritter begins to worry about a young cop who witnessed the fiery death of a truck driver.

On a call with Station 37, a firefighter is struck by a power line and decides to lash out after her injury; Brett is visited by Scott and Amelia; Violet gets a surprise envelope; the rest of 51 enters a contest.

A long-time member of organised crime falls in love with Diana, prompting him to reevaluate his life and contemplate a future beyond his criminal activities.

A major security breach in the city's computer networks forces Firehouse 51's senior leaders to take matters into their own hands; Severide gears up for an arson investigation.

Gallo clashes with the new lieutenant temporarily filling in for Casey; Severide closes in on a dangerous and deadly arsonist.

Severide and Herrmann clash over office space; Boden looks at Pelham's past as he considers making him permanent; Gallo's resentment of Pelham comes to a head; Brett and Ritter force Violet to confront her true feelings for Gallo.

Gallo, Violet and Ritter debut their microbrewery business at Winterfest; Brett prepares to present her paramedicine program to an oversight panel; Firehouse 51 gets in the holiday spirit.

Stella Kidd returns to Firehouse 51; the team must work together to put out a potassium fire in a tunnel; after that incident, Ritter begins to worry about a young cop who witnessed the fiery death of a truck driver.

On a call with Station 37, a firefighter is struck by a power line and decides to lash out after her injury; Brett is visited by Scott and Amelia; Violet gets a surprise envelope; the rest of 51 enters a contest.

A long-time member of organised crime falls in love with Diana, prompting him to reevaluate his life and contemplate a future beyond his criminal activities.

A three-year feud over land and morals reaches a bloody conclusion for a young mother in Miami.

Homicide investigators are convinced an apparent murder-suicide was staged but the experienced CSI on the scene disagrees; only the instincts of the cops, coupled with an outside forensic expert's opinion, convince authorities who the real killer is.

A new recruit, Raf, joins the team on one of the toughest days of the year.

A three-year feud over land and morals reaches a bloody conclusion for a young mother in Miami.

Homicide investigators are convinced an apparent murder-suicide was staged but the experienced CSI on the scene disagrees; only the instincts of the cops, coupled with an outside forensic expert's opinion, convince authorities who the real killer is.

A new recruit, Raf, joins the team on one of the toughest days of the year.

A three-year feud over land and morals reaches a bloody conclusion for a young mother in Miami.

Homicide investigators are convinced an apparent murder-suicide was staged but the experienced CSI on the scene disagrees; only the instincts of the cops, coupled with an outside forensic expert's opinion, convince authorities who the real killer is.

A new recruit, Raf, joins the team on one of the toughest days of the year.

April receives unfortunate news that makes her question her future with Ethan; Dr. Charles and Maggie see tough times on the horizon; Natalie's memory from the accident starts to return.

Dr. Halstead's world is thrown into turmoil when a former patient resurfaces; April has a secret she considers confessing to Ethan; Dr. Charles tries to maintain his focus during a difficult time.

After a major accident at O'Hare, the E.D. is concerned one of their own is in mortal danger; Will's proposal for a safe injection site goes to the board for consideration; Natalie and Goodwin become concerned for Gwen.

The team deals with the aftermath of a school bus crash; Dr. Charles worries Dr. Halstead is putting his medical license in jeopardy; Maggie helps a friend in need.

Two brothers in critical condition are rushed into the hospital by their parents, leaving Dr. Choi, April and Dr. Charles to piece together what actually transpired; Dr. Manning becomes suspicious of a new mother entering the E.D.

Dr. Manning and Dr. Marcel disagree over an abusive husband; Dr. Halstead struggles with ethics and his decision to work at the safe injection site; Dr. Charles and Elsa reveal a misdiagnosis that may change a family's life.

Dr. Charles and Dr. Manning treat a patient who is fully invested in pretending to be someone other than himself; Noah doubts his abilities as a doctor; Dr. Marcel and Dr. Choi face a tough ethical decision; Dr. Halstead puts his faith in an addict.

April receives unfortunate news that makes her question her future with Ethan; Dr. Charles and Maggie see tough times on the horizon; Natalie's memory from the accident starts to return.

Dr. Halstead's world is thrown into turmoil when a former patient resurfaces; April has a secret she considers confessing to Ethan; Dr. Charles tries to maintain his focus during a difficult time.

After a major accident at O'Hare, the E.D. is concerned one of their own is in mortal danger; Will's proposal for a safe injection site goes to the board for consideration; Natalie and Goodwin become concerned for Gwen.

The team deals with the aftermath of a school bus crash; Dr. Charles worries Dr. Halstead is putting his medical license in jeopardy; Maggie helps a friend in need.

Two brothers in critical condition are rushed into the hospital by their parents, leaving Dr. Choi, April and Dr. Charles to piece together what actually transpired; Dr. Manning becomes suspicious of a new mother entering the E.D.

Dr. Manning and Dr. Marcel disagree over an abusive husband; Dr. Halstead struggles with ethics and his decision to work at the safe injection site; Dr. Charles and Elsa reveal a misdiagnosis that may change a family's life.

Dr. Charles and Dr. Manning treat a patient who is fully invested in pretending to be someone other than himself; Noah doubts his abilities as a doctor; Dr. Marcel and Dr. Choi face a tough ethical decision; Dr. Halstead puts his faith in an addict.

April receives unfortunate news that makes her question her future with Ethan; Dr. Charles and Maggie see tough times on the horizon; Natalie's memory from the accident starts to return.

In Carmel Canyon, Calif., wealthy neighbors get into disputes over everything from shared roads and bridges to the upkeep of their respective properties until anger boils over and the ongoing feud is resolved with fatal gunfire.

Police struggle to identify the body of a woman found floating in the Indian River; with only a piece of nautical rope, a strip of duct tape and some plastic bags to go on, they use every forensic tool they have to catch her killer.

Spike must leave his dying father to help Team One face a bomb threat.

In Carmel Canyon, Calif., wealthy neighbors get into disputes over everything from shared roads and bridges to the upkeep of their respective properties until anger boils over and the ongoing feud is resolved with fatal gunfire.

Police struggle to identify the body of a woman found floating in the Indian River; with only a piece of nautical rope, a strip of duct tape and some plastic bags to go on, they use every forensic tool they have to catch her killer.

Spike must leave his dying father to help Team One face a bomb threat.

In Carmel Canyon, Calif., wealthy neighbors get into disputes over everything from shared roads and bridges to the upkeep of their respective properties until anger boils over and the ongoing feud is resolved with fatal gunfire.

Police struggle to identify the body of a woman found floating in the Indian River; with only a piece of nautical rope, a strip of duct tape and some plastic bags to go on, they use every forensic tool they have to catch her killer.

Spike must leave his dying father to help Team One face a bomb threat.

Holiday-themed incidents include a shopper pushed over the edge, a woman who is literally having a "Blue Christmas" and a luggage handler accident on a tarmac; Maddie revisits her past to embrace her future; Bobby receives shocking news.

The 118 responds to a skydiving trip gone wrong; a bank rep is injured in a home repossession; a lovestruck assistant's lunch run ends in disaster; Athena and the family come to terms with Michael's difficult health decision.

The 118 responds to a viral stunt gone haywire, a disaster at a couple's fishing trip and an epic first date fail; Athena investigates a woman who doesn't remember being shot in the head; Eddie must have a difficult conversation with Christopher.

Accidents happen at a bowling alley and a home renovation; Athena pursues a car thief; Bobby and Michael take Harry camping; Chimney and Maddie rush into action when their romantic dinner date takes a wild turn.

Maddie fears for herself and her co-workers when the call center is taken hostage.

Everyone at the crossing pitches in to try and help Rob save his new restaurant while Maggie and Cal continue to drift apart.

The 118 fights an apartment building blaze and attempts a daring rescue of a blind woman trapped inside; Athena discovers a potentially sinister crime; Hen performs a risky medical procedure after an accident at a televised cooking show.

Holiday-themed incidents include a shopper pushed over the edge, a woman who is literally having a "Blue Christmas" and a luggage handler accident on a tarmac; Maddie revisits her past to embrace her future; Bobby receives shocking news.

The 118 responds to a skydiving trip gone wrong; a bank rep is injured in a home repossession; a lovestruck assistant's lunch run ends in disaster; Athena and the family come to terms with Michael's difficult health decision.

The 118 responds to a viral stunt gone haywire, a disaster at a couple's fishing trip and an epic first date fail; Athena investigates a woman who doesn't remember being shot in the head; Eddie must have a difficult conversation with Christopher.

Accidents happen at a bowling alley and a home renovation; Athena pursues a car thief; Bobby and Michael take Harry camping; Chimney and Maddie rush into action when their romantic dinner date takes a wild turn.

Maddie fears for herself and her co-workers when the call center is taken hostage.

Everyone at the crossing pitches in to try and help Rob save his new restaurant while Maggie and Cal continue to drift apart.

The 118 fights an apartment building blaze and attempts a daring rescue of a blind woman trapped inside; Athena discovers a potentially sinister crime; Hen performs a risky medical procedure after an accident at a televised cooking show.

Holiday-themed incidents include a shopper pushed over the edge, a woman who is literally having a "Blue Christmas" and a luggage handler accident on a tarmac; Maddie revisits her past to embrace her future; Bobby receives shocking news.

Enmity, treachery and gunfire ensue when a man rejects the romantic advances of his next door neighbor.

From tropical Hawaii to the frigid waters of Lake Ontario, experts reveal the clues nature leaves behind on a human corpse.

Ed reaches the auditorium of a high school, where a boy is about to commit suicide.

Enmity, treachery and gunfire ensue when a man rejects the romantic advances of his next door neighbor.

From tropical Hawaii to the frigid waters of Lake Ontario, experts reveal the clues nature leaves behind on a human corpse.

Ed reaches the auditorium of a high school, where a boy is about to commit suicide.

Enmity, treachery and gunfire ensue when a man rejects the romantic advances of his next door neighbor.

From tropical Hawaii to the frigid waters of Lake Ontario, experts reveal the clues nature leaves behind on a human corpse.

Ed reaches the auditorium of a high school, where a boy is about to commit suicide.

A convicted murderer's escape hits close to home when several team members end up in danger; Dr. Charles and Dr. Halstead clash over patient treatment plans; Dr. Choi and April discover the truth about a patient's scam; Maggie receives good news.

Dr. Manning and Dr. Charles assist in a complicated case helping a child who is no stranger to the ED; Dr. Marcel and Dr. Choi tend to a police officer with a mysterious gunshot wound; relationships are put to the test as secrets are revealed.

Dr. Charles and Goodwin fear Dr. Halstead is repeating his past mistakes when a patient with early onset Alzheimer's is brought into the E.D.; Maggie and Ben are concerned when one of Ben's students is admitted; Dr. Manning and Dr. Marcel disagree.

Dr. Charles evaluates a 15-year-old who is brought into the E.D. after an apparent fall off an overpass; Will sides with Dr. Asher on a risky treatment plan; tensions run high between Dr. Choi and Dr. Marcel.

Dr. Crockett is visited by two New Orleans detectives who have questions about his past; Dr. Choi puts his life in danger to save a child; Dr. Charles gives fatherly advice to his young daughter.

The staff adjusts to the new normal of the pandemic; Dr. Choi, Dr. Lanik and April fight on the front lines; Dr. Halstead and Hannah face a troubling reality; Dr. Charles tries to clear the air with his daughter following recent developments.

Goodwin announces a new ED Chief, and the choice doesn't make everyone happy; Dr. Manning takes a stand for her patient and finds herself dealing with the repercussions; Dr. Charles tends to family affairs.

A convicted murderer's escape hits close to home when several team members end up in danger; Dr. Charles and Dr. Halstead clash over patient treatment plans; Dr. Choi and April discover the truth about a patient's scam; Maggie receives good news.

Dr. Manning and Dr. Charles assist in a complicated case helping a child who is no stranger to the ED; Dr. Marcel and Dr. Choi tend to a police officer with a mysterious gunshot wound; relationships are put to the test as secrets are revealed.

Dr. Charles and Goodwin fear Dr. Halstead is repeating his past mistakes when a patient with early onset Alzheimer's is brought into the E.D.; Maggie and Ben are concerned when one of Ben's students is admitted; Dr. Manning and Dr. Marcel disagree.

Dr. Charles evaluates a 15-year-old who is brought into the E.D. after an apparent fall off an overpass; Will sides with Dr. Asher on a risky treatment plan; tensions run high between Dr. Choi and Dr. Marcel.

Dr. Crockett is visited by two New Orleans detectives who have questions about his past; Dr. Choi puts his life in danger to save a child; Dr. Charles gives fatherly advice to his young daughter.

The staff adjusts to the new normal of the pandemic; Dr. Choi, Dr. Lanik and April fight on the front lines; Dr. Halstead and Hannah face a troubling reality; Dr. Charles tries to clear the air with his daughter following recent developments.

Goodwin announces a new ED Chief, and the choice doesn't make everyone happy; Dr. Manning takes a stand for her patient and finds herself dealing with the repercussions; Dr. Charles tends to family affairs.

A convicted murderer's escape hits close to home when several team members end up in danger; Dr. Charles and Dr. Halstead clash over patient treatment plans; Dr. Choi and April discover the truth about a patient's scam; Maggie receives good news.

When a man moves to Canyon Country, Calif., he finds himself embroiled in a bizarre and increasingly acrimonious 8-year feud with a neighbor that terminates with blasts from a shotgun.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

Team One is drawn into a dangerous world of express kidnapping when a ransom drop goes wrong.

When a man moves to Canyon Country, Calif., he finds himself embroiled in a bizarre and increasingly acrimonious 8-year feud with a neighbor that terminates with blasts from a shotgun.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

Team One is drawn into a dangerous world of express kidnapping when a ransom drop goes wrong.

When a man moves to Canyon Country, Calif., he finds himself embroiled in a bizarre and increasingly acrimonious 8-year feud with a neighbor that terminates with blasts from a shotgun.

Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

Team One is drawn into a dangerous world of express kidnapping when a ransom drop goes wrong.

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

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

Atwater's reactions during a tense arrest are called into question; the team must dig in to uncover key evidence that could aid in the ongoing investigation and clear Atwater's name.

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

To distract Intelligence from the investigation into his son, Chief O'Neal forces the team to handle a "dead fish" case; when that dead fish turns into a complicated heater case, Burgess is thrown back into difficult memories from her past.

Newly assembled Librarians crew investigates a mysterious dancing sickness, leading them to a showdown with a powerful magical factioneer at a professional ballet company.

The team conducts a sting to snare a corrupt judge by using the perfect undercover briber, a completely virtual tech visionary generated by A.I.; they watch as their "Digital Frankenstein" quickly spins out of control.

Roman spies on a Colombian guest at The Mutiny and uncovers a plot to kill Nestor and other prominent cocaine distributors, which would allow a new and dangerous Colombian cartel to take over Miami.

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

Atwater's reactions during a tense arrest are called into question; the team must dig in to uncover key evidence that could aid in the ongoing investigation and clear Atwater's name.

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

Newly assembled Librarians crew investigates a mysterious dancing sickness, leading them to a showdown with a powerful magical factioneer at a professional ballet company.

The team conducts a sting to snare a corrupt judge by using the perfect undercover briber, a completely virtual tech visionary generated by A.I.; they watch as their "Digital Frankenstein" quickly spins out of control.

Roman spies on a Colombian guest at The Mutiny and uncovers a plot to kill Nestor and other prominent cocaine distributors, which would allow a new and dangerous Colombian cartel to take over Miami.

Police try to track down the killer of two elderly women.

Phoenix police face a unique serial killer team that is stalking and killing innocent people.

Police in Abbotsford, B.C. hunt a stalker who has left one teen dead and another barely alive.

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

Sean O'Neal surprises Upton with a call from prison, revealing sensitive information; while Upton grapples with how to keep O'Neal at a distance, the team quickly mobilizes to stop a crime in progress before it's too late.

Voight and the team help ASA Nina Chapman pursue a drug runner who dodged prison years ago after Chapman's informant mysteriously disappeared; the investigation takes a turn when Voight uncovers a damaging secret from Chapman's past.

After a brutal shooting, Burgess and Ruzek find themselves trapped aboard the busy "L" subway; as they piece together scant evidence, the team is drawn into a dark family drama; Burgess' proximity to the shooting triggers harsh memories.

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

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

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

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

Sean O'Neal surprises Upton with a call from prison, revealing sensitive information; while Upton grapples with how to keep O'Neal at a distance, the team quickly mobilizes to stop a crime in progress before it's too late.

Voight and the team help ASA Nina Chapman pursue a drug runner who dodged prison years ago after Chapman's informant mysteriously disappeared; the investigation takes a turn when Voight uncovers a damaging secret from Chapman's past.

After a brutal shooting, Burgess and Ruzek find themselves trapped aboard the busy "L" subway; as they piece together scant evidence, the team is drawn into a dark family drama; Burgess' proximity to the shooting triggers harsh memories.

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

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

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

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

Sean O'Neal surprises Upton with a call from prison, revealing sensitive information; while Upton grapples with how to keep O'Neal at a distance, the team quickly mobilizes to stop a crime in progress before it's too late.

Voight and the team help ASA Nina Chapman pursue a drug runner who dodged prison years ago after Chapman's informant mysteriously disappeared; the investigation takes a turn when Voight uncovers a damaging secret from Chapman's past.

After a brutal shooting, Burgess and Ruzek find themselves trapped aboard the busy "L" subway; as they piece together scant evidence, the team is drawn into a dark family drama; Burgess' proximity to the shooting triggers harsh memories.

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

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

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

Severide and Seager team up to investigate a fire at the home of a troubled young woman; Pelham moves into 51's rumored cursed office; Kylie assists Kidd with Girls on Fire.

Chief Hawkins goes above and beyond to help Brett and Violet with a problem; Kidd pursues an open lieutenant position; a blast from the past asks Mouch and Herrmann for a favor.

Following an injury in the aftermath of an industrial fire, Severide and Seager work together to investigate an anonymous tip; Kidd searches for the right person to fill the open spot on Truck 81; a possible new recruit to 51 gets tested at a call.

Cruz forms a bond with a young immigrant boy he meets while fighting an apartment fire; Squad makes plans to prank the newest member of their team; Hawkins and Violet struggle to keep their relationship a secret.

Severide and Kidd work with CPD regarding a suspicious car wreck; Hawkins and Violet's relationship is in jeopardy; Chloe and Cruz adjust to a new family dynamic.

Firehouse 51 must band together when one of its own is taken hostage.

Firehouse 51 tackles a fire caused by a dropped jet engine, and one of their own is accused of a theft related to the incident; Kidd and Boden disapprove of Kylie's potential new love interest.

A family friend asks Herrmann for some advice on opening a bar; tensions run high between Emma and Violet; Kidd struggles to keep her team together.

Mouch and Ritter work together to solve a murder mystery; Severide and Cruz tackle a food truck fire; Gallo goes to see Hawkins about Violet.

Severide and Seager team up to investigate a fire at the home of a troubled young woman; Pelham moves into 51's rumored cursed office; Kylie assists Kidd with Girls on Fire.

Chief Hawkins goes above and beyond to help Brett and Violet with a problem; Kidd pursues an open lieutenant position; a blast from the past asks Mouch and Herrmann for a favor.

Following an injury in the aftermath of an industrial fire, Severide and Seager work together to investigate an anonymous tip; Kidd searches for the right person to fill the open spot on Truck 81; a possible new recruit to 51 gets tested at a call.

Cruz forms a bond with a young immigrant boy he meets while fighting an apartment fire; Squad makes plans to prank the newest member of their team; Hawkins and Violet struggle to keep their relationship a secret.

Severide and Kidd work with CPD regarding a suspicious car wreck; Hawkins and Violet's relationship is in jeopardy; Chloe and Cruz adjust to a new family dynamic.

Firehouse 51 must band together when one of its own is taken hostage.

Firehouse 51 tackles a fire caused by a dropped jet engine, and one of their own is accused of a theft related to the incident; Kidd and Boden disapprove of Kylie's potential new love interest.

A family friend asks Herrmann for some advice on opening a bar; tensions run high between Emma and Violet; Kidd struggles to keep her team together.

Mouch and Ritter work together to solve a murder mystery; Severide and Cruz tackle a food truck fire; Gallo goes to see Hawkins about Violet.

Severide and Seager team up to investigate a fire at the home of a troubled young woman; Pelham moves into 51's rumored cursed office; Kylie assists Kidd with Girls on Fire.

Chief Hawkins goes above and beyond to help Brett and Violet with a problem; Kidd pursues an open lieutenant position; a blast from the past asks Mouch and Herrmann for a favor.

Following an injury in the aftermath of an industrial fire, Severide and Seager work together to investigate an anonymous tip; Kidd searches for the right person to fill the open spot on Truck 81; a possible new recruit to 51 gets tested at a call.

Cruz forms a bond with a young immigrant boy he meets while fighting an apartment fire; Squad makes plans to prank the newest member of their team; Hawkins and Violet struggle to keep their relationship a secret.

Severide and Kidd work with CPD regarding a suspicious car wreck; Hawkins and Violet's relationship is in jeopardy; Chloe and Cruz adjust to a new family dynamic.

Firehouse 51 must band together when one of its own is taken hostage.

A family moves into a Minnesota lake house, then a dispute with a neighbor over water access escalates until it leads to a bloody resolution.

Criminals are betrayed by the clues their own bodies leave behind.

Ed gambles with his own safety; Robyn drains her family bank accounts to help Dan get out of debt; Dan confesses his love for Robyn.

A family moves into a Minnesota lake house, then a dispute with a neighbor over water access escalates until it leads to a bloody resolution.

Criminals are betrayed by the clues their own bodies leave behind.

Ed gambles with his own safety; Robyn drains her family bank accounts to help Dan get out of debt; Dan confesses his love for Robyn.

A family moves into a Minnesota lake house, then a dispute with a neighbor over water access escalates until it leads to a bloody resolution.

Criminals are betrayed by the clues their own bodies leave behind.

Ed gambles with his own safety; Robyn drains her family bank accounts to help Dan get out of debt; Dan confesses his love for Robyn.

The big wedding day arrives and Firehouse 51 welcomes Casey back to celebrate the joyous occasion; Emma's plans to replace Violet come to a shocking end.

Kidd and Severide's honeymoon is interrupted by a dangerous person from their past; Kidd's former academy classmate joins Firehouse 51; Brett and Violet reflect on their relationships.

Javi spends a couple of shifts at Firehouse 51; Kidd and Carver work together to help Carver's former boss; as Hawkins and Violet's relationship blossoms, Gallo turns his attention elsewhere.