Halloween finds the first responders racing to the rescue at a cemetery, a haunted hayride and a spooky parade; Maddie thinks she has received a "ghost" call from a missing hiker; Hen is in a life-or-death situation with her father.

In 1990, Gainesville, Fla., becomes the site of a number of coed murders.

The disappearance of millionaire Frank Black.

Explosive experts sifting through bomb evidence discover a more insidious plan.

A private school owner is kidnapped.

An abandoned suitcase containing a young woman's body, leads to a mystery of a second woman missing too.

Sgt. Voight encourages Lt. Casey to go under cover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.

Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.

During an undercover operation, Lt. Casey lands in very dangerous territory; Dawson's suspicions are confirmed; a new candidate (Steven R. McQueen) makes an unusual first impression; a protest hinders firefighters who are trying to battle a blaze.

Chief Boden's job is on the line in the wake of a complicated call to a fire; Severide struggles to adjust to his smaller role and the presence of his new commanding officer; Casey works on finding evidence in his investigation against Nesbitt.

When new evidence appears in the internal affairs investigation that will clear Chief Boden, a twist puts him right back in the thick of it; Brett and Chili try to save a stabbing victim from bleeding to death.

Members of the firehouse band together to help one of their own; Herrmann looks for a way to reopen Molly's; Severide struggles to deal with one of his toughest days as he looks into the arson investigation.

Boden steps up to host a neighborhood wedding that was ruined by a fire; Chief Riddle's political aspirations cause friction at the firehouse; Severide fights his way back to his old position.

Sgt. Voight encourages Lt. Casey to go under cover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.

Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.

During an undercover operation, Lt. Casey lands in very dangerous territory; Dawson's suspicions are confirmed; a new candidate (Steven R. McQueen) makes an unusual first impression; a protest hinders firefighters who are trying to battle a blaze.

Chief Boden's job is on the line in the wake of a complicated call to a fire; Severide struggles to adjust to his smaller role and the presence of his new commanding officer; Casey works on finding evidence in his investigation against Nesbitt.

When new evidence appears in the internal affairs investigation that will clear Chief Boden, a twist puts him right back in the thick of it; Brett and Chili try to save a stabbing victim from bleeding to death.

Members of the firehouse band together to help one of their own; Herrmann looks for a way to reopen Molly's; Severide struggles to deal with one of his toughest days as he looks into the arson investigation.

Boden steps up to host a neighborhood wedding that was ruined by a fire; Chief Riddle's political aspirations cause friction at the firehouse; Severide fights his way back to his old position.

Sgt. Voight encourages Lt. Casey to go under cover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.

Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.

During an undercover operation, Lt. Casey lands in very dangerous territory; Dawson's suspicions are confirmed; a new candidate (Steven R. McQueen) makes an unusual first impression; a protest hinders firefighters who are trying to battle a blaze.

Chief Boden's job is on the line in the wake of a complicated call to a fire; Severide struggles to adjust to his smaller role and the presence of his new commanding officer; Casey works on finding evidence in his investigation against Nesbitt.

When new evidence appears in the internal affairs investigation that will clear Chief Boden, a twist puts him right back in the thick of it; Brett and Chili try to save a stabbing victim from bleeding to death.

Explosive experts sifting through bomb evidence discover a more insidious plan.

A private school owner is kidnapped.

An Appalachian couple is delighted when their neighbors return home after disappearing for 10 years, but they've changed for the worse, unleashing a campaign of endless intimidation and harassment that ultimately ends in a bloodbath.

The murder of a gay couple in rural California leads investigators into the world of hate crimes.

Sgt. Parker faces one of his toughest negotiations yet when the SRU tries to resolve a hostage situation at a bank, then finds that the suspect doesn't fit the original profile.

An Appalachian couple is delighted when their neighbors return home after disappearing for 10 years, but they've changed for the worse, unleashing a campaign of endless intimidation and harassment that ultimately ends in a bloodbath.

The murder of a gay couple in rural California leads investigators into the world of hate crimes.

Sgt. Parker faces one of his toughest negotiations yet when the SRU tries to resolve a hostage situation at a bank, then finds that the suspect doesn't fit the original profile.

An Appalachian couple is delighted when their neighbors return home after disappearing for 10 years, but they've changed for the worse, unleashing a campaign of endless intimidation and harassment that ultimately ends in a bloodbath.

Sgt. Parker faces one of his toughest negotiations yet when the SRU tries to resolve a hostage situation at a bank, then finds that the suspect doesn't fit the original profile.

The Duprees, a powerful and prestigious multi-generational family that is the very definition of Black royalty, live, love, work and play in a leafy Maryland suburb just outside of Washington D.C.

Chief Boden's new neighbor asks him for a favor; tension escalates between Severide and Captain Patterson; Cruz receives a surprise visitor; Mouch and Herrmann are excited to receive concert tickets to see Rush.

Boden thinks he's being set up by his neighbor; Severide's father pays him an unexpected visit; romance is in the air at the Chicago Fire Department gala.

Patterson questions Boden's ability to lead the firehouse as the trial approaches; Brett and Chili find an unconscious man in a garden; Otis tries to fill his social calendar.

Members of Firehouse 51 are unhappy when Patterson fills in for Boden while he tries to clear his name; Severide may have found Serena; Chili and Jimmy attract more attention than they expected.

A member of Firehouse 51 is treated for life-threatening injuries; Cruz searches for Freddie; Mouch has a surprise for Trudy; Chili's behavior worries Brett and Jimmy.

The city prepares for a tornado; Brett is forced to go to Boden about Chili's erratic behavior; Otis asks Dawson for help with his women trouble; the Department of Homeland Security asks Severide for assistance with a suspicious home.

John struggles to cope with his guilt but a bizarre hunting trip changes his perspective; Tommy's influence on him grows.

Elvira's supposedly stolen car leads Rose to her; as reporters swarm Kilraven, Vivienne exploits the chaos; when the guards arrest a suspect in Ruby's murder, Elvira doubts they've caught the real killer.

Boden thinks he's being set up by his neighbor; Severide's father pays him an unexpected visit; romance is in the air at the Chicago Fire Department gala.

John struggles to cope with his guilt but a bizarre hunting trip changes his perspective; Tommy's influence on him grows.

Elvira's supposedly stolen car leads Rose to her; as reporters swarm Kilraven, Vivienne exploits the chaos; when the guards arrest a suspect in Ruby's murder, Elvira doubts they've caught the real killer.

A member of Firehouse 51 is treated for life-threatening injuries; Cruz searches for Freddie; Mouch has a surprise for Trudy; Chili's behavior worries Brett and Jimmy.

The city prepares for a tornado; Brett is forced to go to Boden about Chili's erratic behavior; Otis asks Dawson for help with his women trouble; the Department of Homeland Security asks Severide for assistance with a suspicious home.

Chief Boden's new neighbor asks him for a favor; tension escalates between Severide and Captain Patterson; Cruz receives a surprise visitor; Mouch and Herrmann are excited to receive concert tickets to see Rush.

Patterson questions Boden's ability to lead the firehouse as the trial approaches; Brett and Chili find an unconscious man in a garden; Otis tries to fill his social calendar.

A woman becomes the target of her overly flirtatious neighbor after her husband dies; the woman's brother moves in to protect her and is put on a collision course with the the neighbor that will be resolved with bloodshed.

Investigators are drawn into the dark world of high-end prostitution, illegal aliens and Russian organized crime.

Teen gang members seek revenge after a troubled classmate makes accusations of rape.

A woman becomes the target of her overly flirtatious neighbor after her husband dies; the woman's brother moves in to protect her and is put on a collision course with the the neighbor that will be resolved with bloodshed.

Investigators are drawn into the dark world of high-end prostitution, illegal aliens and Russian organized crime.

Teen gang members seek revenge after a troubled classmate makes accusations of rape.

A woman becomes the target of her overly flirtatious neighbor after her husband dies; the woman's brother moves in to protect her and is put on a collision course with the the neighbor that will be resolved with bloodshed.

Teen gang members seek revenge after a troubled classmate makes accusations of rape.

The Duprees, a powerful and prestigious multi-generational family that is the very definition of Black royalty, live, love, work and play in a leafy Maryland suburb just outside of Washington D.C.

After a neighbor is stabbed, Dr. Choi enlists the help of April to figure out the real cause of the incident; Noah misdiagnoses a patient; Dr. Reese's estranged father comes to Dr. Charles as a patient without her knowledge.

Dr. Manning and Dr. Choi must deliver a baby under dire circumstances; Dr. Rhodes and Dr. Bekker argue about treating a boy with a chronic disease; Dr. Halstead and April are put in an uncomfortable situation; Goodwin and Maggie deal with a lawsuit.

Dr. Halstead and Dr. Manning are at odds over the care of a vegetative man; Dr. Rhodes goes behind Dr. Bekker's back to get his patient at the top of the transplant list; a woman in the waiting room falls asleep and won't wake up.

After a baby is abducted, Goodwin enlists the help of Dr. Charles and Dr. Reese to find the suspect; due to the lockdown, Dr. Rhodes must figure out a way to get into the operating room to help perform open-heart surgery.

Dr. Charles and Dr. Reese search for answers when a mother claims her daughter is possessed; Dr. Rhodes and Dr. Bekker must find a way to save a pair of conjoined twins; Dr. Halstead struggles to get Dr. Manning's attention.

After taking the lead on a surgery, Dr. Bekker feels the heat after something goes wrong; Dr. Manning and Dr. Charles are faced with a tough decision concerning a 9-year-old girl; April and Dr. Reese rush to find the son of a dying patient.

After a 10-year-old boy is admitted to the hospital, Dr. Manning and Dr. Halstead disagree on how to handle the boy's parents; Dr. Rhodes rushes to fix a heart that will be given to Dr. Reese's estranged father.

After a neighbor is stabbed, Dr. Choi enlists the help of April to figure out the real cause of the incident; Noah misdiagnoses a patient; Dr. Reese's estranged father comes to Dr. Charles as a patient without her knowledge.

Dr. Manning and Dr. Choi must deliver a baby under dire circumstances; Dr. Rhodes and Dr. Bekker argue about treating a boy with a chronic disease; Dr. Halstead and April are put in an uncomfortable situation; Goodwin and Maggie deal with a lawsuit.

Dr. Halstead and Dr. Manning are at odds over the care of a vegetative man; Dr. Rhodes goes behind Dr. Bekker's back to get his patient at the top of the transplant list; a woman in the waiting room falls asleep and won't wake up.

After a baby is abducted, Goodwin enlists the help of Dr. Charles and Dr. Reese to find the suspect; due to the lockdown, Dr. Rhodes must figure out a way to get into the operating room to help perform open-heart surgery.

Dr. Charles and Dr. Reese search for answers when a mother claims her daughter is possessed; Dr. Rhodes and Dr. Bekker must find a way to save a pair of conjoined twins; Dr. Halstead struggles to get Dr. Manning's attention.

After taking the lead on a surgery, Dr. Bekker feels the heat after something goes wrong; Dr. Manning and Dr. Charles are faced with a tough decision concerning a 9-year-old girl; April and Dr. Reese rush to find the son of a dying patient.

After a 10-year-old boy is admitted to the hospital, Dr. Manning and Dr. Halstead disagree on how to handle the boy's parents; Dr. Rhodes rushes to fix a heart that will be given to Dr. Reese's estranged father.

After a neighbor is stabbed, Dr. Choi enlists the help of April to figure out the real cause of the incident; Noah misdiagnoses a patient; Dr. Reese's estranged father comes to Dr. Charles as a patient without her knowledge.

On the frontier, a neighbor's dog frightens the other's daughter and grandson, resulting with an all-out war that will leave one of them shot dead and the other in a white-knuckle standoff with police.

Ontario police conduct a manhunt for the prime suspects in four brutal murders.

After a violent altercation with his father, a young man flees the police and runs into the woods, sending the team on a manhunt.

On the frontier, a neighbor's dog frightens the other's daughter and grandson, resulting with an all-out war that will leave one of them shot dead and the other in a white-knuckle standoff with police.

Ontario police conduct a manhunt for the prime suspects in four brutal murders.

After a violent altercation with his father, a young man flees the police and runs into the woods, sending the team on a manhunt.

On the frontier, a neighbor's dog frightens the other's daughter and grandson, resulting with an all-out war that will leave one of them shot dead and the other in a white-knuckle standoff with police.

After a violent altercation with his father, a young man flees the police and runs into the woods, sending the team on a manhunt.

The Duprees, a powerful and prestigious multi-generational family that is the very definition of Black royalty, live, love, work and play in a leafy Maryland suburb just outside of Washington D.C.

During the holidays, the first responders must deal with a stampede at a toy store, a mistletoe stunt gone awry and neighbors competing in a Christmas light showdown; Bobby contemplates his future with Athena; Chimney and Buck try to help Maddie.

Bobby meets Athena's parents for the first time; Maddie attempts to end her marriage for good, causing Doug to insinuate himself even deeper into Chimney's life.

Chimney's history at Station 118 is explored as he works hard to become the paramedic and firefighter he is known to be.

The first responders rally together to search for a missing Maddie.

The call center is hit with a system-wide power outage and must go old school to respond to emergencies; the first responders must deal with explosions in multiple homes and a difficult child birth; Michael confronts Bobby about parenting his kids.

When a going-away party for a bank manager turns into an emergency, the first responders are accused of pulling off a daring heist.

After his devastating family tragedy in Minnesota, Bobby Nash moves to Los Angeles to start over, where he becomes captain of the 118 and meets Athena Grant for the first time.

During the holidays, the first responders must deal with a stampede at a toy store, a mistletoe stunt gone awry and neighbors competing in a Christmas light showdown; Bobby contemplates his future with Athena; Chimney and Buck try to help Maddie.

Bobby meets Athena's parents for the first time; Maddie attempts to end her marriage for good, causing Doug to insinuate himself even deeper into Chimney's life.

Chimney's history at Station 118 is explored as he works hard to become the paramedic and firefighter he is known to be.

The first responders rally together to search for a missing Maddie.

The call center is hit with a system-wide power outage and must go old school to respond to emergencies; the first responders must deal with explosions in multiple homes and a difficult child birth; Michael confronts Bobby about parenting his kids.

When a going-away party for a bank manager turns into an emergency, the first responders are accused of pulling off a daring heist.

After his devastating family tragedy in Minnesota, Bobby Nash moves to Los Angeles to start over, where he becomes captain of the 118 and meets Athena Grant for the first time.

During the holidays, the first responders must deal with a stampede at a toy store, a mistletoe stunt gone awry and neighbors competing in a Christmas light showdown; Bobby contemplates his future with Athena; Chimney and Buck try to help Maddie.

A single mother gets along with her handyman neighbor, until she gets a new man in her life and her neighbor adopts more than 50 dogs; accusations become threats, threats become attacks and, eventually, the conflict reaches a bloody conclusion.

A nurse is the main suspect of five bodies found in a wooded area in central Florida.

A member of the team is caught in the wrong place at the wrong time when a young man holds a courtroom hostage in an attempt to clear his name for a murder he didn't commit.

A single mother gets along with her handyman neighbor, until she gets a new man in her life and her neighbor adopts more than 50 dogs; accusations become threats, threats become attacks and, eventually, the conflict reaches a bloody conclusion.

A nurse is the main suspect of five bodies found in a wooded area in central Florida.

A member of the team is caught in the wrong place at the wrong time when a young man holds a courtroom hostage in an attempt to clear his name for a murder he didn't commit.

A single mother gets along with her handyman neighbor, until she gets a new man in her life and her neighbor adopts more than 50 dogs; accusations become threats, threats become attacks and, eventually, the conflict reaches a bloody conclusion.

A member of the team is caught in the wrong place at the wrong time when a young man holds a courtroom hostage in an attempt to clear his name for a murder he didn't commit.

The Duprees, a powerful and prestigious multi-generational family that is the very definition of Black royalty, live, love, work and play in a leafy Maryland suburb just outside of Washington D.C.

After a shooting occurs during a block party, the staff is overrun with victims; Dr. Choi devises a new mass casualty plan; Dr. Manning struggles to stay focused when she realizes her son and nanny might have been at the scene.

Dr. Manning rushes to save a boy who has a life-threatening case of the flu; April suspects Dr. Choi's sister of stealing opioid pain killers; Dr. Rhodes and Dr. Bekker disagree over the best treatment for a cardiac patient who is 21 weeks pregnant.

Dr. Rhodes second guesses removing himself from the team working to separate conjoined twins; Dr. Choi and April make a startling discovery about his sister; Dr. Charles uncovers troubling information concerning Dr. Reese's father.

Bekker takes drastic action to keep Rhodes from leaving Med for good; Halstead questions Manning's feelings about their upcoming wedding; Ethan receives shocking news about his sister, Emily; Charles mourns a loss.

Chicago Med, Fire and P.D. cross paths when a high-rise fire floods Med with victims, including Will and Jay Halstead's father; Rhodes must save the life and career of Stella Kidd; Manning treats a burn victim; Charles assesses a distraught Otis.

An Indonesian man who doesn't speak English arrives at the hospital with a mysterious illness; Dr. Halstead attends Maggie's family reunion; Dr. Rhodes accepts a complicated heart surgery without consulting Dr. Latham.

The Race continues in St. John's and Gander, Nfld., where the remaining teams compete for a coveted spot in the Season 11 finale.

On the high-stakes season finale, the final teams head to Collingwood, Ont. for a double Roadblock and chance to jetsurf their way to victory!

Dr. Manning rushes to save a boy who has a life-threatening case of the flu; April suspects Dr. Choi's sister of stealing opioid pain killers; Dr. Rhodes and Dr. Bekker disagree over the best treatment for a cardiac patient who is 21 weeks pregnant.

Dr. Rhodes second guesses removing himself from the team working to separate conjoined twins; Dr. Choi and April make a startling discovery about his sister; Dr. Charles uncovers troubling information concerning Dr. Reese's father.

Dr. Rhodes begins his cardiothoracic surgery fellowship but gets off on the wrong foot with his new boss; Dr. Choi begins his life as chief resident; Sarah is caught off-guard by Dr. Charles; April tries to deal with her recently discovered illness.

Dr. Manning and Dr. Rhodes suspect that two separate cases involving sick babies may be connected; a homeless patient's upbeat disposition enlightens Dr. Halstead and Dr.Charles; Dr. Choi and a Navy corpsman deal with the toll of gang violence.

An Indonesian man who doesn't speak English arrives at the hospital with a mysterious illness; Dr. Halstead attends Maggie's family reunion; Dr. Rhodes accepts a complicated heart surgery without consulting Dr. Latham.

The Race continues in St. John's and Gander, Nfld., where the remaining teams compete for a coveted spot in the Season 11 finale.

On the high-stakes season finale, the final teams head to Collingwood, Ont. for a double Roadblock and chance to jetsurf their way to victory!

A disabled fireman polices his neighbors and punishes violations ranging from loud music to off-leash dogs; things boil over at a birthday party where shots are fired and blood runs in the street.

A search mission for three women missing in Yosemite Park turns to a murder investigation when two are discovered in the trunk of their burned out car.

Jules puts her negotiating skills to the test when the unit responds to a kidnapping, only to find that there are actually two victims.

A disabled fireman polices his neighbors and punishes violations ranging from loud music to off-leash dogs; things boil over at a birthday party where shots are fired and blood runs in the street.

A search mission for three women missing in Yosemite Park turns to a murder investigation when two are discovered in the trunk of their burned out car.

Jules puts her negotiating skills to the test when the unit responds to a kidnapping, only to find that there are actually two victims.

A disabled fireman polices his neighbors and punishes violations ranging from loud music to off-leash dogs; things boil over at a birthday party where shots are fired and blood runs in the street.

Jules puts her negotiating skills to the test when the unit responds to a kidnapping, only to find that there are actually two victims.

Anita's twist to an upcoming annual event could help heal old wounds; Bill buys his wife some peace of mind; Hayley is rattled by a run-in with Joey; Madison is upset with Chelsea for butting into family business; Eva gets a touching offer.

Lena and Danny are pulled into a high-stakes murder investigation when a whistleblower tied to one of Mae's court cases is found dead; Jonah and Sean prepare for their first official day on the job.

Officer Lucy Chen goes undercover to infiltrate an illegal firearm operation; Detective Harper and Officer John Nolan work together to solve a mystery involving severed limbs found around the city.

After one of their own is shot, the team suffers a series of close calls and realizes their division may be a target for a group of masked assailants.

The team must try to understand why they were targeted and if there is a bigger plan in place; Nolan must survive his last shift before his wedding to Bailey.

The team comes together to celebrate John and Bailey's wedding; Celina discovers a discrepancy in her case, leading to a new discovery; Lucy and Tim's relationship is put to the test.

Lena and Danny are pulled into a high-stakes murder investigation when a whistleblower tied to one of Mae's court cases is found dead; Jonah and Sean prepare for their first official day on the job.

After discovering they've disrupted a sinister underground operation called The Process, Colter and Russell must race to find the source behind these chained events and end it once and for all.

Nolan and Bailey's honeymoon is more of a nightmare than a dream when it turns into an active crime scene; Tim and Celina partner up and must uncover the identity of a John Doe.

Officer Lucy Chen goes undercover to infiltrate an illegal firearm operation; Detective Harper and Officer John Nolan work together to solve a mystery involving severed limbs found around the city.

After discovering they've disrupted a sinister underground operation called The Process, Colter and Russell must race to find the source behind these chained events and end it once and for all.

The team must try to understand why they were targeted and if there is a bigger plan in place; Nolan must survive his last shift before his wedding to Bailey.

The team comes together to celebrate John and Bailey's wedding; Celina discovers a discrepancy in her case, leading to a new discovery; Lucy and Tim's relationship is put to the test.

It's Officer Aaron Thorsen's first day back since the assault, and he's tasked with a series of high-stress cases to determine whether he's ready to work; the team investigates a homicide case with a potential tie to the pentagram killer.

When a toddler is found at the scene of a crime, John and Bailey must decide whether to let the child go to a shelter for the night or care for her themselves; when someone from his past returns, Tim disappears and leaves Lucy in the dark.

Following their time as foster parents, Bailey wants to have a baby and forces John to reconsider their decision to not have children; John and Celina discover a prison escapee whom they fear is out for revenge and race to find her.

Police search for the killer of an elderly upscale Toronto couple.

The largest police investigation of the decade lasted 23 days to catch a sniper who terrorized Washington, D. C. residents.

When an unidentified burned corpse is found in a field, state-of-the-art forensics is turned to.

The first responders deal with a calamity at a chocolate factory; a mail bomb explosion; Eddie receives some surprising news from Shannon; Maddie contemplates her future in the call center.

A stunt driver is caught in a hairy situation; a teenage social influencer is bugging out; the city is on high alert after two mail bombs go off; Eddie's family comes to town; Buck faces a life-or-death situation.

A teenager speeds out of control on the freeway; a routine traffic stop uncovers a shocking kidnapping; Buck struggles with his recovery.

A massive tsunami hits the Santa Monica Pier, jeopardizing the lives of both Buck and Christopher.

A massive tsunami hits the Santa Monica Pier; Buck fears the worst when Christopher goes missing.

The team races to save workers in a high-rise during a fire drill, car accident victims, and siblings fighting over a family heirloom; Buck gives Bobby surprising news; Eddie helps Christopher deal with the trauma caused by the tsunami.

The 118 races to help protesters at a slaughter house and a wife who finds herself trapped in a "rage room" with her husband's mistress; Athena takes action after Michael, May and Harry experience a traumatic traffic stop.

The first responders deal with a calamity at a chocolate factory; a mail bomb explosion; Eddie receives some surprising news from Shannon; Maddie contemplates her future in the call center.

A stunt driver is caught in a hairy situation; a teenage social influencer is bugging out; the city is on high alert after two mail bombs go off; Eddie's family comes to town; Buck faces a life-or-death situation.

A teenager speeds out of control on the freeway; a routine traffic stop uncovers a shocking kidnapping; Buck struggles with his recovery.

A massive tsunami hits the Santa Monica Pier, jeopardizing the lives of both Buck and Christopher.

A massive tsunami hits the Santa Monica Pier; Buck fears the worst when Christopher goes missing.

The team races to save workers in a high-rise during a fire drill, car accident victims, and siblings fighting over a family heirloom; Buck gives Bobby surprising news; Eddie helps Christopher deal with the trauma caused by the tsunami.

The 118 races to help protesters at a slaughter house and a wife who finds herself trapped in a "rage room" with her husband's mistress; Athena takes action after Michael, May and Harry experience a traumatic traffic stop.

The first responders deal with a calamity at a chocolate factory; a mail bomb explosion; Eddie receives some surprising news from Shannon; Maddie contemplates her future in the call center.

A stunt driver is caught in a hairy situation; a teenage social influencer is bugging out; the city is on high alert after two mail bombs go off; Eddie's family comes to town; Buck faces a life-or-death situation.

A teenager speeds out of control on the freeway; a routine traffic stop uncovers a shocking kidnapping; Buck struggles with his recovery.

A massive tsunami hits the Santa Monica Pier, jeopardizing the lives of both Buck and Christopher.

A massive tsunami hits the Santa Monica Pier; Buck fears the worst when Christopher goes missing.

When an unidentified burned corpse is found in a field, state-of-the-art forensics is turned to.

Police search for the killer of an elderly upscale Toronto couple.

The largest police investigation of the decade lasted 23 days to catch a sniper who terrorized Washington, D. C. residents.

A serial rapist stalks elderly women for nearly 20 years before escalating to murder.

A sniper targeting abortion doctors turns murderous and a DNA "needle in a haystack" identifies the gunman.

A small town encounters satanic rituals and a savage killer.

News of a mass shooting brings the members of Firehouse 51 into harrowing territory; Casey investigates the missing money from the fundraiser; Jimmy participates in a boxing match; Chili's erratic behavior continues to be a major issue for Brett.

Chili does not respond well when Severide tries to talk to her about her erratic behavior; members of the firehouse think Casey should run for the position of alderman; Jimmy and Antonio face off in a boxing match.

Firehouse 51 responds to an unusual call from another firehouse; the addition of a new firefighter (Miranda Rae Mayo) has repercussions; Casey realizes that certain voters have personal agendas for wanting him elected.

A propaganda attack causes Casey to reconsider his run for alderman; when a man is trapped inside a burning car, it seems the fire may have been set intentionally; Trudy's nerdy brother plans Mouch's bachelor party; a kidnapping investigation.

Severide is led to reexamine a case from the past while he investigates the discovery of a baby's body in a chimney; with election day nearing, Casey prepares for another confrontation with Alderman.

A call takes a bad turn when Brett witnesses a murder while aiding a victim who has a leg wound; a restaurant fire has people trapped inside a vault; Mouch gets cold feet about his upcoming wedding.

Casey attempts to use political influence to remedy a gang retribution incident; Severide helps Holloway in a dangerous undercover investigation.

News of a mass shooting brings the members of Firehouse 51 into harrowing territory; Casey investigates the missing money from the fundraiser; Jimmy participates in a boxing match; Chili's erratic behavior continues to be a major issue for Brett.

Chili does not respond well when Severide tries to talk to her about her erratic behavior; members of the firehouse think Casey should run for the position of alderman; Jimmy and Antonio face off in a boxing match.

Firehouse 51 responds to an unusual call from another firehouse; the addition of a new firefighter (Miranda Rae Mayo) has repercussions; Casey realizes that certain voters have personal agendas for wanting him elected.

A propaganda attack causes Casey to reconsider his run for alderman; when a man is trapped inside a burning car, it seems the fire may have been set intentionally; Trudy's nerdy brother plans Mouch's bachelor party; a kidnapping investigation.

Severide is led to reexamine a case from the past while he investigates the discovery of a baby's body in a chimney; with election day nearing, Casey prepares for another confrontation with Alderman.

A call takes a bad turn when Brett witnesses a murder while aiding a victim who has a leg wound; a restaurant fire has people trapped inside a vault; Mouch gets cold feet about his upcoming wedding.

Casey attempts to use political influence to remedy a gang retribution incident; Severide helps Holloway in a dangerous undercover investigation.

News of a mass shooting brings the members of Firehouse 51 into harrowing territory; Casey investigates the missing money from the fundraiser; Jimmy participates in a boxing match; Chili's erratic behavior continues to be a major issue for Brett.

Chili does not respond well when Severide tries to talk to her about her erratic behavior; members of the firehouse think Casey should run for the position of alderman; Jimmy and Antonio face off in a boxing match.

Firehouse 51 responds to an unusual call from another firehouse; the addition of a new firefighter (Miranda Rae Mayo) has repercussions; Casey realizes that certain voters have personal agendas for wanting him elected.

A propaganda attack causes Casey to reconsider his run for alderman; when a man is trapped inside a burning car, it seems the fire may have been set intentionally; Trudy's nerdy brother plans Mouch's bachelor party; a kidnapping investigation.

Severide is led to reexamine a case from the past while he investigates the discovery of a baby's body in a chimney; with election day nearing, Casey prepares for another confrontation with Alderman.

A serial rapist stalks elderly women for nearly 20 years before escalating to murder.

A sniper targeting abortion doctors turns murderous and a DNA "needle in a haystack" identifies the gunman.

After moving to the countryside, a couple clashes with the gun shop owners across the street; mutual video cameras record threats, fights and growing hostilities leading to shots fired and blood spilled.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

A routine protection job goes awry when an explosion in a hotel kitchen masks the kidnapping of the wife of the man the team is guarding.

After moving to the countryside, a couple clashes with the gun shop owners across the street; mutual video cameras record threats, fights and growing hostilities leading to shots fired and blood spilled.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

A routine protection job goes awry when an explosion in a hotel kitchen masks the kidnapping of the wife of the man the team is guarding.

After moving to the countryside, a couple clashes with the gun shop owners across the street; mutual video cameras record threats, fights and growing hostilities leading to shots fired and blood spilled.

A routine protection job goes awry when an explosion in a hotel kitchen masks the kidnapping of the wife of the man the team is guarding.

The Duprees, a powerful and prestigious multi-generational family that is the very definition of Black royalty, live, love, work and play in a leafy Maryland suburb just outside of Washington D.C.

Detective Holloway testifies in court as part of an undercover operation, leaving Severide to watch her young son; a fire at an art gallery with a victim trapped inside leads Cruz to make a rash decision.

Dawson risks her life to save a boy in an apartment fire; Severide pushes for an upgrade on the house's fire masks; Cruz and Brett have an idea to get Otis to take a blood test.

A building collapses and leaves dozens of people trapped and injured; Chief Boden faces a life-or-death decision in the rescue plan; Dawson continues her quest to foster Louie; tensions flare between Casey and Antonio.

Lt. Boden and Jimmy are at odds in the aftermath of recent events; Kidd must deal with her volatile ex; Dawson puts on her best face in the pursuit of fostering Louie; Casey leaves town to attend a three-day summit.

Severide and Stella keep an eye out for Grant; Louie has Dawson questioning her dangerous career path; Casey's relationship with Susan Weller cools down; tensions between Borrelli and Boden reach a boiling point.

Casey and Dawson get caught in what may be a political mess; Stella has a big decision to make about her boyfriend; members of the squad are in a dangerous situation after responding to a car accident; Severide befriends a famous socialite.

Tensions rise as John and Fiona are forced to attend the funeral of a beloved local resident; John's secret becomes dangerously close to being exposed.

Emerson digs into James Doe's tattoos and Tom Quigley's scandal; Elvira faces Hughie's manipulations as he lures her to a face-to-face meeting and threatens to reveal her secrets.

Dawson risks her life to save a boy in an apartment fire; Severide pushes for an upgrade on the house's fire masks; Cruz and Brett have an idea to get Otis to take a blood test.

Tensions rise as John and Fiona are forced to attend the funeral of a beloved local resident; John's secret becomes dangerously close to being exposed.

Emerson digs into James Doe's tattoos and Tom Quigley's scandal; Elvira faces Hughie's manipulations as he lures her to a face-to-face meeting and threatens to reveal her secrets.

Severide and Stella keep an eye out for Grant; Louie has Dawson questioning her dangerous career path; Casey's relationship with Susan Weller cools down; tensions between Borrelli and Boden reach a boiling point.

Casey and Dawson get caught in what may be a political mess; Stella has a big decision to make about her boyfriend; members of the squad are in a dangerous situation after responding to a car accident; Severide befriends a famous socialite.

Casey gets help from Susan Weller for an urgent personal matter; Severide is given an opportunity to travel with Travis Brenner; Stella saves a street kid from a tunnel fire.

Casey is forced to use extreme measures to save a father and daughter from an acid spill; Dawson and Brett respond to an elderly woman who has a difficult senior advocate; Otis shares some exciting news.

A man finds himself living between hostile neighbors on both sides, including a former U.S. marine with post-traumatic stress disorder; the neighbors' campaign of intimidation ramps up to the point of no return and ends with a deadly confrontation.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

A woman kidnaps another woman and holds her hostage; when the situation escalates quickly, team members question how things was handled.

A man finds himself living between hostile neighbors on both sides, including a former U.S. marine with post-traumatic stress disorder; the neighbors' campaign of intimidation ramps up to the point of no return and ends with a deadly confrontation.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

A woman kidnaps another woman and holds her hostage; when the situation escalates quickly, team members question how things was handled.

A man finds himself living between hostile neighbors on both sides, including a former U.S. marine with post-traumatic stress disorder; the neighbors' campaign of intimidation ramps up to the point of no return and ends with a deadly confrontation.

A woman kidnaps another woman and holds her hostage; when the situation escalates quickly, team members question how things was handled.

The Duprees, a powerful and prestigious multi-generational family that is the very definition of Black royalty, live, love, work and play in a leafy Maryland suburb just outside of Washington D.C.

When several patients turn out to have the same rare infection, Dr. Charles' epidemiologist daughter comes in to consult; an elderly patient's son and young girlfriend disagree over his treatment; Dr. Reese tries to help a young drug addict.

A car crash at the Chicago Marathon leaves victims in critical condition; April and her medical resident brother must perform an intense operation in the field; an 8-year-old girl experiences sudden hearing loss; Dr. Choi treats a malnourished woman.

A young cancer patient struggles to tell her parents about her condition; Dr. Reese turns to Dr. Charles and Detective Lindsay for help with a troubled young man; a teen science geek and her friends impress Dr. Choi and Natalie.

Goodwin reunites with her childhood sweetheart; Dr. Halstead gets lured into a concierge doctor app idea; Dr. Rhodes treats a woman with a heart infection against the advice of Dr. Charles; a former patient of Reese's reaches out for help.