Now that John Nolan knows about Bailey's past, he must decide if they still have a future; when a plane crashes in the middle of the city, the team races to find out why.

In 1988, motorists discover human body parts dumped along the highway.

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

The disappearance of millionaire Frank Black.

When District 21 goes after a Colombian drug gang following a series of brutal slayings, an asset in the investigation emerges.

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.

Antonio believes a Colombian gang is involved in his son's kidnapping; Halstead learns new information about Lindsay; Voight offers Antonio a new way to get information about Diego's whereabouts.

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

Voight and the team check out a house that has been associated with a series of gangs; people from the past cause Halstead's temper to rise.

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

Olinsky tries to protect his daughter; a counterfeiting operation is investigated; when a hoarder is arrested, more than clutter is uncovered.

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 childbirth; Michael confronts Bobby about parenting his kids.

Atwater and Burgess must keep their new patrol car in mint condition; the Intelligence Unit uncovers drug smuggling; Voight's behavior toward Lindsay drives her right where he doesn't want her; tensions rise between Olinsky and Ruzek.

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

New York's SVU agents Fin and Rollins help track down a serial killer who rapes his victims; Burgess gets an opportunity to prove herself; Lindsay brings Halstead as her date to her high school reunion.

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.

Voight's son may be involved with the Fitori murder case, intensifying tension between Antonio and Voight; Ruzek helps Burgess get retribution.

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.

When District 21 goes after a Colombian drug gang following a series of brutal slayings, an asset in the investigation emerges.

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.

Antonio believes a Colombian gang is involved in his son's kidnapping; Halstead learns new information about Lindsay; Voight offers Antonio a new way to get information about Diego's whereabouts.

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

Voight and the team check out a house that has been associated with a series of gangs; people from the past cause Halstead's temper to rise.

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

Martin invites Louisa to watch the annual bird migration over Port Wenn;an elderly woman has hallucinations that lead to dire consequences; Martin must perform an emergency procedure on his young friend.

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 childbirth; Michael confronts Bobby about parenting his kids.

When an 18-year-old goes missing from his family's restaurant, Colter uncovers the teen's underground fake ID business and the secret life he's been hiding from his parents.

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

Olinsky tries to protect his daughter; a counterfeiting operation is investigated; when a hoarder is arrested, more than clutter is uncovered.

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.

The victim of foul play, a missing 16-year-old from Delaware, is discovered floating off the coast of New Jersey's Cape May; as the scant evidence reveals hidden clues, a high-flying homicidal plot begins to unravel.

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.

Martin invites Louisa to watch the annual bird migration over Port Wenn;an elderly woman has hallucinations that lead to dire consequences; Martin must perform an emergency procedure on his young friend.

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.

Antonio believes a Colombian gang is involved in his son's kidnapping; Halstead learns new information about Lindsay; Voight offers Antonio a new way to get information about Diego's whereabouts.

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

Voight and the team check out a house that has been associated with a series of gangs; people from the past cause Halstead's temper to rise.

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

Olinsky tries to protect his daughter; a counterfeiting operation is investigated; when a hoarder is arrested, more than clutter is uncovered.

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 childbirth; Michael confronts Bobby about parenting his kids.

Atwater and Burgess must keep their new patrol car in mint condition; the Intelligence Unit uncovers drug smuggling; Voight's behavior toward Lindsay drives her right where he doesn't want her; tensions rise between Olinsky and Ruzek.

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

New York's SVU agents Fin and Rollins help track down a serial killer who rapes his victims; Burgess gets an opportunity to prove herself; Lindsay brings Halstead as her date to her high school reunion.

In 1988, motorists discover human body parts dumped along the highway.

Voight's son may be involved with the Fitori murder case, intensifying tension between Antonio and Voight; Ruzek helps Burgess get retribution.

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

CSIs determine that a girl's ex-husband had his parents assassinate her.

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

A private school owner is kidnapped.

Chief Boden unwillingly agrees to let Dawson and Brett go under cover; Kidd and Zach's relationship hits a bump; Cruz has a hard time expressing his true feelings for Brett.

After responding to a car accident, Casey and Dawson become skeptical when a domineering husband continues to answer for his injured wife; Cruz is frustrated with Herrmann and Mouch; Kidd uncovers something meaningful to Severide.

Otis and Kidd's lives are put in jeopardy when there's gunfire inside a house; Dawson comforts Brett during an especially trying time; Casey begins to notice that romance might be going on within the firehouse.

The crew struggles to come to terms with an injury to one of their own; a temporary replacement must be dealt with; Boden ponders some interesting news; Kidd has a hard time keeping a secret.

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; Otis takes on new responsibilities at the firehouse.

When the FBI takes over the firehouse for an undercover mission, Casey and Severide volunteer to assist with the investigation; Kidd attempts to help Severide come to terms with recent developments he's been managing.

The team responds to a residential fire at a property belonging to a drug cartel; a hefty amount of money is missing from the crime scene; Kidd makes a big decision.

Chief Boden unwillingly agrees to let Dawson and Brett go under cover; Kidd and Zach's relationship hits a bump; Cruz has a hard time expressing his true feelings for Brett.

After responding to a car accident, Casey and Dawson become skeptical when a domineering husband continues to answer for his injured wife; Cruz is frustrated with Herrmann and Mouch; Kidd uncovers something meaningful to Severide.

Otis and Kidd's lives are put in jeopardy when there's gunfire inside a house; Dawson comforts Brett during an especially trying time; Casey begins to notice that romance might be going on within the firehouse.

The crew struggles to come to terms with an injury to one of their own; a temporary replacement must be dealt with; Boden ponders some interesting news; Kidd has a hard time keeping a secret.

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; Otis takes on new responsibilities at the firehouse.

When the FBI takes over the firehouse for an undercover mission, Casey and Severide volunteer to assist with the investigation; Kidd attempts to help Severide come to terms with recent developments he's been managing.

The team responds to a residential fire at a property belonging to a drug cartel; a hefty amount of money is missing from the crime scene; Kidd makes a big decision.

Chief Boden unwillingly agrees to let Dawson and Brett go under cover; Kidd and Zach's relationship hits a bump; Cruz has a hard time expressing his true feelings for Brett.

After responding to a car accident, Casey and Dawson become skeptical when a domineering husband continues to answer for his injured wife; Cruz is frustrated with Herrmann and Mouch; Kidd uncovers something meaningful to Severide.

Otis and Kidd's lives are put in jeopardy when there's gunfire inside a house; Dawson comforts Brett during an especially trying time; Casey begins to notice that romance might be going on within the firehouse.

The crew struggles to come to terms with an injury to one of their own; a temporary replacement must be dealt with; Boden ponders some interesting news; Kidd has a hard time keeping a secret.

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; Otis takes on new responsibilities at the firehouse.

CSIs determine that a girl's ex-husband had his parents assassinate her.

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

Two women have lived next door to each other since childhood; one of the women's ex-husband begins seeing the other, leading to a conflict; when property disputes are mixed in, the result is an act of violence that engulfs them all.

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

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

Two women have lived next door to each other since childhood; one of the women's ex-husband begins seeing the other, leading to a conflict; when property disputes are mixed in, the result is an act of violence that engulfs them all.

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

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

Two women have lived next door to each other since childhood; one of the women's ex-husband begins seeing the other, leading to a conflict; when property disputes are mixed in, the result is an act of violence that engulfs them all.

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

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

After saving a girl from a car accident, Boden and Severide receive a surprise package; Brett struggles to keep quiet about Cruz reacquainting with his now-married high school sweetheart; a crisis brings Bria back into Dawson's life.

Lt. Severide is shocked when Rene Royce resurfaces; Casey comes up with a plan to help Chief Boden in his latest pursuit; Kidd regrets a decision she made regarding Severide; Herrmann clashes with Lt. Colannino over their son's basketball team.

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.

Boden's chances for a promotion are met with potential complications; Dawson and Casey don't see eye to eye on an important decision; Kidd finds herself struggling to find time with Severide; Brett and Dawson respond to a tough call.

Reeling from Dawson's continued absence, Casey makes a rash move during a rescue, while Brett struggles with a series of replacement partners; meanwhile, Boden faces scrutiny from Commissioner Grissom, who sends his deputy to monitor Firehouse 51.

Firehouse 51 bands together to fight a raging fire on the 20th floor of the residential high-rise where Jay and Will Halstead's father lives and has gone missing; in the midst of the chaos, Brett learns unsettling information about her new partner.

An American brother and sister travel to Sydney, looking to grow their spray tan business.

Bumpy Johnson must protect the Italian mob when Joseph Bonanno decides to abolish the Commission; captain Omar takes his campaign against Malcolm X to a new level.

Bumpy Johnson must protect the Italian mob when Joseph Bonanno decides to abolish the Commission; captain Omar takes his campaign against Malcolm X to a new level.

Bumpy Johnson must fend off rivals to receive the largest dope shipment in New York history, while Harlem explodes into riot; Malcolm X reluctantly agrees to protection from an unusual source.

Bumpy Johnson must fend off rivals to receive the largest dope shipment in New York history, while Harlem explodes into riot; Malcolm X reluctantly agrees to protection from an unusual source.

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.

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.

Boden's chances for a promotion are met with potential complications; Dawson and Casey don't see eye to eye on an important decision; Kidd finds herself struggling to find time with Severide; Brett and Dawson respond to a tough call.

Martin and Vicki are confronted by their corporate shortcomings; Susi and Terry concoct a plan to keep Mony off their trail.

An American brother and sister travel to Sydney, looking to grow their spray tan business.

Conan O'Brien gets us ready for the Oscars and we profile Academy Award nominee Ruth E. Carter.

Bumpy Johnson must protect the Italian mob when Joseph Bonanno decides to abolish the Commission; captain Omar takes his campaign against Malcolm X to a new level.

Bumpy Johnson must fend off rivals to receive the largest dope shipment in New York history, while Harlem explodes into riot; Malcolm X reluctantly agrees to protection from an unusual source.

Two neighboring bachelors start out as friends; harmless banter turns into threats eventually igniting an escalating war; the violence ends with a murder so shocking it is almost beyond belief.

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

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

Two neighboring bachelors start out as friends; harmless banter turns into threats eventually igniting an escalating war; the violence ends with a murder so shocking it is almost beyond belief.

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

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

Two neighboring bachelors start out as friends; harmless banter turns into threats eventually igniting an escalating war; the violence ends with a murder so shocking it is almost beyond belief.

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

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

Ethan finds himself at odds with Natalie and Sharon when it comes to the treatment of a troubled teenager who's just given birth; Dr. Halstead treats a hypochondriac with an overbearing wife.

Dr. Connor Rhodes is reunited with his sister as he treats a family friend; Dr. Natalie Manning must persuade a young musician to undergo a life-saving surgery that could destroy her hearing.

The doctors treat those injured in a movie theater shooting; Natalie asks Daniel for help treating a teenager with an eating disorder; a patient surprises everyone.

Rhodes and Zanetti race to save a member of Firehouse 51; April's brother struggles during his first day at the hospital; a woman saved from a burning building leads to a bigger mystery.

Airplane stowaways are brought to the hospital with significant injuries; Cornelius Rhodes (D.W. Moffett) is honored after making a large donation to the hospital; Dr. Manning's mother-in-law (Annie Potts) misunderstands Dr. Halstead's intentions.

A patient's life is in jeopardy when legal issues complicate an essential bone marrow transplant; Dr. Charles comes to an unusual conclusion about a homeless man's recent behavior; Dr. Manning's parents visit; victims of a hit-and-run accident.

After returning from maternity leave, Dr. Manning helps treat a teenager with an extensive history of medical issues; Dr. Choi goes above and beyond when a former Navy shipmate has a potentially life-threatening ailment.

Grieving Tadpole, the Van Lew's ensure his death is not in vain; after his funeral, Mary Jane confides to Elizabeth and Eliza an idea for retribution against the Confederacy.

Dr. Connor Rhodes is reunited with his sister as he treats a family friend; Dr. Natalie Manning must persuade a young musician to undergo a life-saving surgery that could destroy her hearing.

The doctors treat those injured in a movie theater shooting; Natalie asks Daniel for help treating a teenager with an eating disorder; a patient surprises everyone.

Rhodes and Zanetti race to save a member of Firehouse 51; April's brother struggles during his first day at the hospital; a woman saved from a burning building leads to a bigger mystery.

Airplane stowaways are brought to the hospital with significant injuries; Cornelius Rhodes (D.W. Moffett) is honored after making a large donation to the hospital; Dr. Manning's mother-in-law (Annie Potts) misunderstands Dr. Halstead's intentions.

A patient's life is in jeopardy when legal issues complicate an essential bone marrow transplant; Dr. Charles comes to an unusual conclusion about a homeless man's recent behavior; Dr. Manning's parents visit; victims of a hit-and-run accident.

Grieving Tadpole, the Van Lew's ensure his death is not in vain; after his funeral, Mary Jane confides to Elizabeth and Eliza an idea for retribution against the Confederacy.

A couple escapes the dangers of the big city and moves to the country; however, they begin to suspect their new neighbors are involved in the drug trade, leading to a bloody conflict with children caught in the crossfire.

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

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

A couple escapes the dangers of the big city and moves to the country; however, they begin to suspect their new neighbors are involved in the drug trade, leading to a bloody conflict with children caught in the crossfire.

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

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

A couple escapes the dangers of the big city and moves to the country; however, they begin to suspect their new neighbors are involved in the drug trade, leading to a bloody conflict with children caught in the crossfire.

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

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

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.

One local teacher, Louisa Gavin, questions Martin's harsh demeanor; Martin quickly gets annoyed by the antics of the town locals.

Athena and the 118 respond to bizarre emergency calls on Halloween, including a flock of crows terrorizing a field trip, an office employee having a close encounter with an eight-limbed creature and a ghost-like girl wandering a neighborhood.

After Martin comes face to face with his childhood bully and diagnoses a potentially contagious illness, he is forced to cancel Port Wenn's monthly baked bean supper, angering everyone in the town.

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.

Athena and the 118 respond to bizarre emergency calls on Halloween, including a flock of crows terrorizing a field trip, an office employee having a close encounter with an eight-limbed creature and a ghost-like girl wandering a neighborhood.

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 firefighter moves into a family-friendly neighborhood with his wife and child, but the rambunctious teenagers living next door drive him over the edge.

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

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

A firefighter moves into a family-friendly neighborhood with his wife and child, but the rambunctious teenagers living next door drive him over the edge.

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

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

A firefighter moves into a family-friendly neighborhood with his wife and child, but the rambunctious teenagers living next door drive him over the edge.

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

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

Dr. Halstead's career is in jeopardy when he revives a terminally ill patient, despite an order to not resuscitate; a patient inspires Dr. Choi to seek advice from Dr. Charles; everyone is shocked by a revelation about a member of the staff.

A 9/11 hero with pulmonary fibrosis needs a new set of lungs; Sarah considers hospitals for her residency match; April and Maggie want to remain at Chicago Med; a teenage hockey player with an overbearing father is injured.

A patient with a life-threatening heart condition makes a decision that puts Rhodes and Choi at odds; the lawsuit against Halstead moves forward; a patient who was misdiagnosed has a flesh-eating bacterial disease; a girl with a contagious bacteria.

Nurse Lockwood is arrested for refusing to do a DUI blood test on a patient without his consent; Dr. Halstead discusses his impending lawsuit with his lawyer; Dr. Manning and Sharon Goodwin raise concerns about the nature of a baby's injuries.

A husband has an unusual request after the death of his wife; Dr. Charles tries to deal with a patient who wants to cut off his own arm; Dr. Rhodes is concerned about possible complications for a boy who swallowed magnets.

Dr. Choi is tested when an erratic patient takes drastic measures; Dr. Manning questions the circumstances behind a young boy's broken wrist.

A patient refuses medication for her pain; Dr. Halstead treats a former high school classmate; a pregnant woman has a big reason not to deliver her child.

When the body of a devout Catholic divorcee is found in her smalltown Pennsylvania home, detectives must connect the dots between a silver van, a .32-caliber shell casing, and a bonanza of envelopes stuffed with cash.

A 9/11 hero with pulmonary fibrosis needs a new set of lungs; Sarah considers hospitals for her residency match; April and Maggie want to remain at Chicago Med; a teenage hockey player with an overbearing father is injured.

A patient with a life-threatening heart condition makes a decision that puts Rhodes and Choi at odds; the lawsuit against Halstead moves forward; a patient who was misdiagnosed has a flesh-eating bacterial disease; a girl with a contagious bacteria.

Nurse Lockwood is arrested for refusing to do a DUI blood test on a patient without his consent; Dr. Halstead discusses his impending lawsuit with his lawyer; Dr. Manning and Sharon Goodwin raise concerns about the nature of a baby's injuries.

A husband has an unusual request after the death of his wife; Dr. Charles tries to deal with a patient who wants to cut off his own arm; Dr. Rhodes is concerned about possible complications for a boy who swallowed magnets.

Dr. Choi is tested when an erratic patient takes drastic measures; Dr. Manning questions the circumstances behind a young boy's broken wrist.

A patient refuses medication for her pain; Dr. Halstead treats a former high school classmate; a pregnant woman has a big reason not to deliver her child.

When the body of a devout Catholic divorcee is found in her smalltown Pennsylvania home, detectives must connect the dots between a silver van, a .32-caliber shell casing, and a bonanza of envelopes stuffed with cash.

A young family builds their dream home in the Kentucky Hills, but their slice of heaven turns into a hellish experience for the quiet couple living next door; a dispute over a shared road leads to fireworks, fury and cold-blooded murder.

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

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 young family builds their dream home in the Kentucky Hills, but their slice of heaven turns into a hellish experience for the quiet couple living next door; a dispute over a shared road leads to fireworks, fury and cold-blooded murder.

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

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 young family builds their dream home in the Kentucky Hills, but their slice of heaven turns into a hellish experience for the quiet couple living next door; a dispute over a shared road leads to fireworks, fury and cold-blooded murder.

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

Danny, Sarah and Lena race to stop a looming threat on St. Patrick's Day; homesickness sparks a family gathering; Lena's personal life takes a hopeful turn.

The team is called to investigate a train robbery; Officer Chen has doubts about being Sgt. Bradford's aid; Officer Harper takes matters into her own hands and makes a life-changing decision about her personal life.

Officer Nolan and the LA division of the FBI enlist the help of FBI trainee Simone Clark when one of her former students is suspected of terrorism following an explosion at a local power station.

The team, alongside the LA division of the FBI, is in a race to stop bombs that have been scattered throughout the city by a suspected terrorist; the joint task force is suspicious of the CIA's involvement in the situation.

Sgt. Grey supports Officer Nolan's desire to become a training officer and offers to ride with him for the day to get him ready; Tim and Lucy decide on their plans for Mother's Day and a romantic vacation.

Danny, Sarah and Lena race to stop a looming threat on St. Patrick's Day; homesickness sparks a family gathering; Lena's personal life takes a hopeful turn.

When a doctor vanishes after her shift, Colter uncovers a trail of stolen drugs and disguises revealing a calculated revenge plot.

Angelo learns that a previous job may be the key to unmasking The Ferryman; Dave has a big break in his investigation that could expose Angelo's true identity.

The team is called to investigate a train robbery; Officer Chen has doubts about being Sgt. Bradford's aid; Officer Harper takes matters into her own hands and makes a life-changing decision about her personal life.

When a doctor vanishes after her shift, Colter uncovers a trail of stolen drugs and disguises revealing a calculated revenge plot.

Angelo learns that a previous job may be the key to unmasking The Ferryman; Dave has a big break in his investigation that could expose Angelo's true identity.

Sgt. Grey supports Officer Nolan's desire to become a training officer and offers to ride with him for the day to get him ready; Tim and Lucy decide on their plans for Mother's Day and a romantic vacation.

Officer Nolan is forced to spend a week in solitary confinement in a quiet border town with a young local officer who is in need of some training; Sgt. Bradford and Officer Chen go under cover together in a possible drug trafficking case.

Officer John Nolan is once again face to face with serial killer Rosalind; officers Bradford and Chen work undercover with Detective Lopez and the Las Vegas Police Department to arrest leaders of a major criminal enterprise.

Officer John Nolan and the team feel they must negotiate with a distraught man who is holding a hospital hostage to ensure his wife receives a lifesaving surgery.

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.

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.

Voight's new Internal Affairs handler proves to be suspicious of his actions; Voight must work with his former partner from the Gang Unit; Halstead enlists Jin to help him gather more information on Lonnie Rodiger; Olinsky takes Ruzek down a peg.

Burgess and Atwater come across a gunshot victim and the only witness is Olinsky's daughter; Ruzek goes to Burgess for help with an undercover mission.

Halstead's badge is revoked when Lonnie Rodiger is found dead; Severide (Taylor Kinney) and Clarke (Peter Mills) find Dr. Elliot's torso; Sumner (Sydney Tamiia Poitier) tries to prove herself; Lindsay shares a moment with Severide.

Dueling gangs are suspected when a massacre occurs and $8 million is stolen; Platt asks Ruzek for help.

As Voight and his team search for the bombers, they realize there might be more bombs set to detonate; Burgess' niece fights for her life.

Cmdr. Perry notifies the unit that Pulpo has been released to help with a case; Ruzek gets difficult news; when a bit of Lindsay's past resurfaces, Voight reminds her how far she's come.

Platt and Voight discuss their pasts; Jin uses a scapegoat when he is caught tinkering with Voight's computer; Lindsay realizes she needs to come clean.

Voight's new Internal Affairs handler proves to be suspicious of his actions; Voight must work with his former partner from the Gang Unit; Halstead enlists Jin to help him gather more information on Lonnie Rodiger; Olinsky takes Ruzek down a peg.

Burgess and Atwater come across a gunshot victim and the only witness is Olinsky's daughter; Ruzek goes to Burgess for help with an undercover mission.

Halstead's badge is revoked when Lonnie Rodiger is found dead; Severide (Taylor Kinney) and Clarke (Peter Mills) find Dr. Elliot's torso; Sumner (Sydney Tamiia Poitier) tries to prove herself; Lindsay shares a moment with Severide.

Dueling gangs are suspected when a massacre occurs and $8 million is stolen; Platt asks Ruzek for help.

When a doctor vanishes after her shift, Colter uncovers a trail of stolen drugs and disguises revealing a calculated revenge plot.

Angelo learns that a previous job may be the key to unmasking The Ferryman; Dave has a big break in his investigation that could expose Angelo's true identity.

When the body of a devout Catholic divorcee is found in her smalltown Pennsylvania home, detectives must connect the dots between a silver van, a .32-caliber shell casing, and a bonanza of envelopes stuffed with cash.

Voight's new Internal Affairs handler proves to be suspicious of his actions; Voight must work with his former partner from the Gang Unit; Halstead enlists Jin to help him gather more information on Lonnie Rodiger; Olinsky takes Ruzek down a peg.

Burgess and Atwater come across a gunshot victim and the only witness is Olinsky's daughter; Ruzek goes to Burgess for help with an undercover mission.

Halstead's badge is revoked when Lonnie Rodiger is found dead; Severide (Taylor Kinney) and Clarke (Peter Mills) find Dr. Elliot's torso; Sumner (Sydney Tamiia Poitier) tries to prove herself; Lindsay shares a moment with Severide.

Dueling gangs are suspected when a massacre occurs and $8 million is stolen; Platt asks Ruzek for help.

As Voight and his team search for the bombers, they realize there might be more bombs set to detonate; Burgess' niece fights for her life.

Cmdr. Perry notifies the unit that Pulpo has been released to help with a case; Ruzek gets difficult news; when a bit of Lindsay's past resurfaces, Voight reminds her how far she's come.

Platt and Voight discuss their pasts; Jin uses a scapegoat when he is caught tinkering with Voight's computer; Lindsay realizes she needs to come clean.

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

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.

Herrmann faces hazing in his new role as lieutenant; Foster suspects a young gymnast's injury is more than meets the eye; Severide is jealous of Kidd's best friend; Casey and Boden turn to P.D. after treating two victims who have similar injuries.

Casey helps a reporter uncover the truth behind a trailer park fire; Boden attempts to make peace with Grissom; Hermann, Otis and Kidd take action when Molly's receives a bad Yelp review; Severide reaches out to his father for a favor.

Gorsch continues his reign of terror at Firehouse 51, taking over Boden's morning meeting and going out on calls in Boden's place; Brett and Foster respond to a call where a Halloween prank has turned deadly serious.

Kidd and the team embark on a mission to help Severide as he struggles to process his father Benny's death; Brett suspects a teenage driver in a car accident is hiding something.

Severide lands in grave danger when Firehouse 51 battles a risky structure fire; Casey lends another helping hand to Naomi, the investigative reporter; Herrmann, Mouch, Otis and Cruz search for a tantalizing memento from Boden's past.

Firehouse 51 responds to a massive freeway accident that impacts someone close to them; Foster runs into someone from her past after a harrowing call; Casey and Naomi grow closer; Severide and Kidd's relationship is tested.

Casey and Naomi fight to escape a raging fire in Casey's apartment; Brett and the team struggle to create an engaging community fire safety presentation; Severide and Kidd's relationship reaches a crossroads.

Herrmann faces hazing in his new role as lieutenant; Foster suspects a young gymnast's injury is more than meets the eye; Severide is jealous of Kidd's best friend; Casey and Boden turn to P.D. after treating two victims who have similar injuries.

Casey helps a reporter uncover the truth behind a trailer park fire; Boden attempts to make peace with Grissom; Hermann, Otis and Kidd take action when Molly's receives a bad Yelp review; Severide reaches out to his father for a favor.

Gorsch continues his reign of terror at Firehouse 51, taking over Boden's morning meeting and going out on calls in Boden's place; Brett and Foster respond to a call where a Halloween prank has turned deadly serious.

Kidd and the team embark on a mission to help Severide as he struggles to process his father Benny's death; Brett suspects a teenage driver in a car accident is hiding something.

Severide lands in grave danger when Firehouse 51 battles a risky structure fire; Casey lends another helping hand to Naomi, the investigative reporter; Herrmann, Mouch, Otis and Cruz search for a tantalizing memento from Boden's past.

Firehouse 51 responds to a massive freeway accident that impacts someone close to them; Foster runs into someone from her past after a harrowing call; Casey and Naomi grow closer; Severide and Kidd's relationship is tested.

Casey and Naomi fight to escape a raging fire in Casey's apartment; Brett and the team struggle to create an engaging community fire safety presentation; Severide and Kidd's relationship reaches a crossroads.

Herrmann faces hazing in his new role as lieutenant; Foster suspects a young gymnast's injury is more than meets the eye; Severide is jealous of Kidd's best friend; Casey and Boden turn to P.D. after treating two victims who have similar injuries.

Casey helps a reporter uncover the truth behind a trailer park fire; Boden attempts to make peace with Grissom; Hermann, Otis and Kidd take action when Molly's receives a bad Yelp review; Severide reaches out to his father for a favor.

Gorsch continues his reign of terror at Firehouse 51, taking over Boden's morning meeting and going out on calls in Boden's place; Brett and Foster respond to a call where a Halloween prank has turned deadly serious.

Kidd and the team embark on a mission to help Severide as he struggles to process his father Benny's death; Brett suspects a teenage driver in a car accident is hiding something.

Severide lands in grave danger when Firehouse 51 battles a risky structure fire; Casey lends another helping hand to Naomi, the investigative reporter; Herrmann, Mouch, Otis and Cruz search for a tantalizing memento from Boden's past.

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

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

A U.S. Army veteran goes out of his way to make his neighbors feel welcome; when a child's birthday gift goes missing, it takes only 37 days for the friendships to end in a killing spree.

A small town encounters satanic rituals and a savage killer.

Logan's widow starts a chain reaction campaign to kill people from her husband's captor's families.

A U.S. Army veteran goes out of his way to make his neighbors feel welcome; when a child's birthday gift goes missing, it takes only 37 days for the friendships to end in a killing spree.

A small town encounters satanic rituals and a savage killer.

Logan's widow starts a chain reaction campaign to kill people from her husband's captor's families.

A U.S. Army veteran goes out of his way to make his neighbors feel welcome; when a child's birthday gift goes missing, it takes only 37 days for the friendships to end in a killing spree.

Logan's widow starts a chain reaction campaign to kill people from her husband's captor's families.

A small town encounters satanic rituals and a savage killer.

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.

Casey further investigates a motorcycle accident at the request of the victim's son; Kidd, Foster and Brett bond while helping Kidd fix a mistake; Mouch and Otis have a falling out after Otis' teasing hits a sore spot.

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.

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.

A spate of robberies comes to light after a firehouse lockbox key goes missing; Sgt. 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.