Members of Firehouse 51 are dismayed to learn their boundaries have been redrawn to overlap with an adjacent station, and problems quickly arise; Casey and Gallo hunt a missing piece of equipment; Brett and Foster find themselves at odds.

A pest control problem forces the 51 team to temporarily bunk with Firehouse 20; all under the same roof, Casey clashes with Capt. Delaney, while Foster, Kidd and Brett fear Capt. Leone has it out for them; Boden mulls a procedural overhaul.

A series of false alarms at a private school hinders 51's ability to respond to legitimate emergencies; Kidd asks for ideas to surprise Severide on his birthday; Cruz and Brett rent out their extra room but get more than they bargained for.

The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51; Boden and Severide are asked to make peace with an old foe for the greater good; Brett receives family news while Foster plans a party with friends.

A series of mysterious gas leaks has members of Firehouse 51 puzzled and spread thin; Brett's conflicted when her birth mother gets serious about finding her; Severide misunderstands his role as Cruz's best man; Mouch bites off more than he can chew.

A suitcase filled with unidentified human remains unlocks a missing person's case that has gone unsolved for years; the forensic analysis of a nearly-destroyed cellphone found in the suitcase reveals a mysterious selfie.

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.

The building of a backyard shed destroys a yearslong, close relationship between two neighbors and ignites a vicious conflict that sees property destroyed, pets killed, and finally two people shot to death in cold blood.

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.

Team One discovers two young con artists who have ties to Pete Joris at a bank robbery.

The building of a backyard shed destroys a yearslong, close relationship between two neighbors and ignites a vicious conflict that sees property destroyed, pets killed, and finally two people shot to death in cold blood.

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.

Team One discovers two young con artists who have ties to Pete Joris at a bank robbery.

The building of a backyard shed destroys a yearslong, close relationship between two neighbors and ignites a vicious conflict that sees property destroyed, pets killed, and finally two people shot to death in cold blood.

Team One discovers two young con artists who have ties to Pete Joris at a bank robbery.

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.

Things get personal for Casey and Gallo in the aftermath of a suburban house fire involving a mother and her young son; Herrmann campaigns for more respect; Kidd has an idea for giving back to her community.

Severide teams up with Seager and the OFI when a motel structure fire turns suspicious; Firehouse 51 members become amateur sleuths following a Reddit post involving one of their own; Brett continues to get invested in her birth mother, Julie.

Tension builds when a group of rabble-rousers attempts to lock down the firehouse; Brett is faced with a monumental decision; Cruz readies himself for a big day; Gallo and Ritter attempt to launch Firehouse 51 into the social media age.

When one of 51's own gets injured on a call, Severide becomes obsessed with helping out; Foster contemplates a big decision; Kidd is concerned for one of her high school trainees.

As Firehouse 51 welcomes a new member to the team, whose presence could provide some complications, Brett's leadership shines during a scary call; Boden sees great potential in Kidd and proposes an idea that could have lasting repercussions.

Brett and Mackey find their lives in peril; Casey and Brett tread in unfamiliar territory; Severide chases a memory while Kidd adeptly solves a firehouse problem; Ritter puts himself in harm's way during a harrowing call.

Martin and Vicki try to finalize a long-term national distribution deal that will take Tansform to the next level; Susi attempts to change careers; Terry struggles to get clean; Mony jumps into a new business.

Bumpy and Colombo face off for control of the heroin trade when Monsieur 98 returns to bring in the next shipment; Omar makes a romantic appeal to Elise; Pettigrew discovers cocaine through his love affair with a Cuban woman.

Bumpy utilizes Battle's contacts in the CIA to secure a steady supply of a new drug: cocaine; Stella lies to Fineman in an attempt to escape Colombo's oversight; Mayme applies for a government contract for Palmetto.

Tension builds when a group of rabble-rousers attempts to lock down the firehouse; Brett is faced with a monumental decision; Cruz readies himself for a big day; Gallo and Ritter attempt to launch Firehouse 51 into the social media age.

When one of 51's own gets injured on a call, Severide becomes obsessed with helping out; Foster contemplates a big decision; Kidd is concerned for one of her high school trainees.

Martin and Vicki try to finalize a long-term national distribution deal that will take Tansform to the next level; Susi attempts to change careers; Terry struggles to get clean; Mony jumps into a new business.

Bumpy and Colombo face off for control of the heroin trade when Monsieur 98 returns to bring in the next shipment; Omar makes a romantic appeal to Elise; Pettigrew discovers cocaine through his love affair with a Cuban woman.

Bumpy utilizes Battle's contacts in the CIA to secure a steady supply of a new drug: cocaine; Stella lies to Fineman in an attempt to escape Colombo's oversight; Mayme applies for a government contract for Palmetto.

A Detroit man wishes his neighbor lived on the opposite end of 8 Mile Road.

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

Someone hacks the computer system to show a crime in progress.

A Detroit man wishes his neighbor lived on the opposite end of 8 Mile Road.

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

Someone hacks the computer system to show a crime in progress.

A Detroit man wishes his neighbor lived on the opposite end of 8 Mile Road.

Someone hacks the computer system to show a crime in progress.

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

Goodwin is forced by the hospital board to implement new guidelines that cause headaches for the doctors; Dr. Rhodes and Ava continue to compete in the operating room; Dr. Charles and Dr. Reese are surprised by a patient's theory about his sickness.

Dr. Charles learns a troubling fact about the man who shot him; Dr. Rhodes and Dr. Bekker come to an agreement during a complicated surgery; Will and Natalie have an ethical dilemma; April and Noah discover working together isn't always easy.

An ethical debate arises when a patient refuses to take an HIV test but still demands treatment; Natalie and Will try to diagnose a young girl with increasing paralysis; Noah deals with his first death as a resident; Sarah continues to avoid work.

Ethan tries to diagnose a man with no symptoms; Sarah uses pepper spray on an aggressive patient; Will treats a young couple willing to sacrifice anything to have a baby; Natalie must inform a woman that she was sterilized as a young girl.

Dr. Charles is pressured when Dr. Choi and Dr. Manning disagree with his medical decision regarding a baby born with an addiction to heroin; Dr. Rhodes deals with relationship issues; Goodwin helps Bert understand Lyla's sickness.

Dr. Choi struggles to help a woman cope with anorexia; after a suspension, Dr. Reese is immediately put to the test by Dr. Charles; a patient of Dr. Rhodes' is forcibly transferred; Dr. Halstead tries to get Dr. Manning's son to like him.

Dr. Choi and April suspect a patient's family might be abusing her; Dr. Manning and Dr. Halstead struggle with a family dealing with their premature baby; Dr. Rhodes is persuaded into performing a risky surgery on Dr. Bekker's mentor.

Stokely and Lumpkin round up enemies, holding some hostage and beating and killing others; Clara is about to be beaten for a confession by Stokely when the Van Lews and President Davis arrive; Stokely is stopped and the hostages are released.

Dr. Charles learns a troubling fact about the man who shot him; Dr. Rhodes and Dr. Bekker come to an agreement during a complicated surgery; Will and Natalie have an ethical dilemma; April and Noah discover working together isn't always easy.

An ethical debate arises when a patient refuses to take an HIV test but still demands treatment; Natalie and Will try to diagnose a young girl with increasing paralysis; Noah deals with his first death as a resident; Sarah continues to avoid work.

Ethan tries to diagnose a man with no symptoms; Sarah uses pepper spray on an aggressive patient; Will treats a young couple willing to sacrifice anything to have a baby; Natalie must inform a woman that she was sterilized as a young girl.

Dr. Charles is pressured when Dr. Choi and Dr. Manning disagree with his medical decision regarding a baby born with an addiction to heroin; Dr. Rhodes deals with relationship issues; Goodwin helps Bert understand Lyla's sickness.

Dr. Choi and April suspect a patient's family might be abusing her; Dr. Manning and Dr. Halstead struggle with a family dealing with their premature baby; Dr. Rhodes is persuaded into performing a risky surgery on Dr. Bekker's mentor.

We dig deep into the success of one of the most talked about shows on streaming.

Stokely and Lumpkin round up enemies, holding some hostage and beating and killing others; Clara is about to be beaten for a confession by Stokely when the Van Lews and President Davis arrive; Stokely is stopped and the hostages are released.

They say fences make good neighbors, but sometimes they can make dead ones.

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

A young nurse is abducted by a serial killer whose past could save her life.

They say fences make good neighbors, but sometimes they can make dead ones.

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

A young nurse is abducted by a serial killer whose past could save her life.

They say fences make good neighbors, but sometimes they can make dead ones.

A young nurse is abducted by a serial killer whose past could save her life.

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

The members of the 118 are called to a series of emergencies around Christmas Eve; Eddie struggles with an emotional Christopher.

Athena, Bobby and the 118 must rescue a family whose pick-up truck has been rigged with a pipe bomb that will detonate if the vehicle slows down and goes under 55 mph; Eddie has a rough transition into his new job; Buck makes a relationship decision.

Chimney is determined to find a missing Maddie amongst the chaos of St. Patrick's Day.

Athena investigates a robbery at a gas station; Bobby and the 126 race to rescue a novice diver who panics while in a shark cage; Eddie reaches his breaking point; Maddie shares some news with Buck, who realizes he has to come clean with Taylor.

The members of the 118 race into action when a woman falls over her balcony; Athena investigates when a bike rider is impaled on a stop sign; Eddie begins his therapy for his PTSD and survivor's guilt; Maddie fears the worst when Jee-Yun falls ill.

A social media influencer has an accident in a sauna; an emergency at a reality show wedding; a tragedy when a mother and her daughter go hiking; Maddie worries she has missed too many firsts with Jee-Yun.

Maggie looks for a doctor to support her application to the board of physicians and Cal discovers information that causes him to question Maggie's history with Liam.

Martin must toggle between the potential revelation of his blood phobia, a startling baby delivery and the arrival of his amorous ex; Louisa receives some thought-provoking medical results; Al and Elaine must navigate their uncertain future.

Athena, Bobby and the 118 must rescue a family whose pick-up truck has been rigged with a pipe bomb that will detonate if the vehicle slows down and goes under 55 mph; Eddie has a rough transition into his new job; Buck makes a relationship decision.

Chimney is determined to find a missing Maddie amongst the chaos of St. Patrick's Day.

Athena investigates a robbery at a gas station; Bobby and the 126 race to rescue a novice diver who panics while in a shark cage; Eddie reaches his breaking point; Maddie shares some news with Buck, who realizes he has to come clean with Taylor.

The members of the 118 race into action when a woman falls over her balcony; Athena investigates when a bike rider is impaled on a stop sign; Eddie begins his therapy for his PTSD and survivor's guilt; Maddie fears the worst when Jee-Yun falls ill.

A social media influencer has an accident in a sauna; an emergency at a reality show wedding; a tragedy when a mother and her daughter go hiking; Maddie worries she has missed too many firsts with Jee-Yun.

Maggie looks for a doctor to support her application to the board of physicians and Cal discovers information that causes him to question Maggie's history with Liam.

Martin must toggle between the potential revelation of his blood phobia, a startling baby delivery and the arrival of his amorous ex; Louisa receives some thought-provoking medical results; Al and Elaine must navigate their uncertain future.

Some grudges die hard, but this neighbor's won't die until his enemies do.

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

Team One confronts a man desperate to keep the promise he made to his deaf nephew by protecting the only place the boy has ever felt safe.

Some grudges die hard, but this neighbor's won't die until his enemies do.

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

Team One confronts a man desperate to keep the promise he made to his deaf nephew by protecting the only place the boy has ever felt safe.

Some grudges die hard, but this neighbor's won't die until his enemies do.

Team One confronts a man desperate to keep the promise he made to his deaf nephew by protecting the only place the boy has ever felt safe.

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

Dr. Manning struggles with the aftermath of a head injury; Dr. Manning and Dr. Halstead deal with a teenage patient and her overbearing older husband; Dr. Rhodes learns alarming information about the woman he went on a date with.

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.

In a high-crime Seattle suburb, 87-year-old Floyd Zumwalt is clubbed to death with a baseball bat; it's ultimately a single drop of blood splatter and a pair of missing pants that lead detectives to the killer.

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.

In a high-crime Seattle suburb, 87-year-old Floyd Zumwalt is clubbed to death with a baseball bat; it's ultimately a single drop of blood splatter and a pair of missing pants that lead detectives to the killer.

A Virginia man insists, What's mine is mine, and what's yours is mine.

Using technology to solve crime.

Team One believes a bomb is just the first in a war between rival biker gangs.

A Virginia man insists, What's mine is mine, and what's yours is mine.

Using technology to solve crime.

Team One believes a bomb is just the first in a war between rival biker gangs.

A Virginia man insists, What's mine is mine, and what's yours is mine.

Team One believes a bomb is just the first in a war between rival biker gangs.

Using technology to solve crime.

A drive-by shooting at the church pulls Lena and Danny into the complicated past of one of Reverend Peters' associates; Mae faces painful revelations about her family; the team manages internal friction.

Now that Elijah and Abril have become allies, the team must rely on Monica, Elijah's lawyer, to uncover their plans; Officers Nolan and Juarez reopen her sister's case and discover a discrepancy that leads them on a new trail.

When Dim goes missing, Officer Chen and Sgt. Bradford, along with the CIA, set out to find him and enlist the help of Juicy.

The team investigates a pattern of kidnappings, which leads them to a discovery that hits close to home with one of their own; Lucy and Tim's relationship is put to the test as they begin to feel the hard hours of their jobs.

Officer Tim Bradford's ex-wife returns and asks the team to help her save someone from her undercover past; Isabel's return also creates additional pressure in Lucy and Tim's relationship as they assist in the search.

A drive-by shooting at the church pulls Lena and Danny into the complicated past of one of Reverend Peters' associates; Mae faces painful revelations about her family; the team manages internal friction.

Randy enlists Colter's help when one of his closest friends vanishes while under house arrest.

Angelo's worlds collide, setting up a confrontation with The Ferryman.

Now that Elijah and Abril have become allies, the team must rely on Monica, Elijah's lawyer, to uncover their plans; Officers Nolan and Juarez reopen her sister's case and discover a discrepancy that leads them on a new trail.

Randy enlists Colter's help when one of his closest friends vanishes while under house arrest.

Angelo's worlds collide, setting up a confrontation with The Ferryman.

Officer Tim Bradford's ex-wife returns and asks the team to help her save someone from her undercover past; Isabel's return also creates additional pressure in Lucy and Tim's relationship as they assist in the search.

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 stop a militia from detonating a highly combustible truck in their possession; Nolan, Thorson, Juarez and Harper search for three men who may have been exposed to Ebola.

Murder weapons often hold several critical forensic clues about the crime.

Fire, water, earth - killers call on all the elements in their attempt to cover up their crimes.

In fall 1991, Toronto was paralyzed by the story of a missing six-year-old girl found raped and murdered in the boiler room of her apartment building; with four suspects, CSIs turned to the brand-new science of DNA to catch the killer.

Bunny comes to Lindsay with a concern that leads the team to a case that robbery-homicide has been investigating; Voight is suspicious of Bunny's motives.

Burgess and Roman become trapped after Burgess pursues suspicious activity at a convenience store without calling in for backup; the intelligence team receives taser certification.

When an undercover narcotics officer goes missing, Antonio is asked to help find him; Burgess and Roman ask Mouch (Christian Stolte) for help with a squatter situation.

The members of intelligence go under cover at a World Trade conference to assess political threats; Halstead's brother immediately stirs up trouble when he shows up in town.

An investigation into a drug robbery gone wrong reveals Voight has ties to a teen linked to a double murder; Desk Sgt. Platt cares for a young girl.

A case involving one of Chicago's most wanted fugitives hits close to home with Olinsky; an altercation with another officer lands Sean Roman in hot water; Platt helps Nadia prepare for her polygraph test.

After arriving in Chicago to assist Voight and the team with a rape/murder case that has distinct similarities to a decade-old case from New York, Sgt. Benson asks Fin and Amaro to help; the prime suspect asks for a meeting with Lindsay.

Bunny comes to Lindsay with a concern that leads the team to a case that robbery-homicide has been investigating; Voight is suspicious of Bunny's motives.

Burgess and Roman become trapped after Burgess pursues suspicious activity at a convenience store without calling in for backup; the intelligence team receives taser certification.

When an undercover narcotics officer goes missing, Antonio is asked to help find him; Burgess and Roman ask Mouch (Christian Stolte) for help with a squatter situation.

Martin must toggle between the potential revelation of his blood phobia, a startling baby delivery and the arrival of his amorous ex; Louisa receives some thought-provoking medical results; Al and Elaine must navigate their uncertain future.

Randy enlists Colter's help when one of his closest friends vanishes while under house arrest.

Angelo's worlds collide, setting up a confrontation with The Ferryman.

In a high-crime Seattle suburb, 87-year-old Floyd Zumwalt is clubbed to death with a baseball bat; it's ultimately a single drop of blood splatter and a pair of missing pants that lead detectives to the killer.

Martin must toggle between the potential revelation of his blood phobia, a startling baby delivery and the arrival of his amorous ex; Louisa receives some thought-provoking medical results; Al and Elaine must navigate their uncertain future.

Burgess and Roman become trapped after Burgess pursues suspicious activity at a convenience store without calling in for backup; the intelligence team receives taser certification.

When an undercover narcotics officer goes missing, Antonio is asked to help find him; Burgess and Roman ask Mouch (Christian Stolte) for help with a squatter situation.

The members of intelligence go under cover at a World Trade conference to assess political threats; Halstead's brother immediately stirs up trouble when he shows up in town.

An investigation into a drug robbery gone wrong reveals Voight has ties to a teen linked to a double murder; Desk Sgt. Platt cares for a young girl.

A case involving one of Chicago's most wanted fugitives hits close to home with Olinsky; an altercation with another officer lands Sean Roman in hot water; Platt helps Nadia prepare for her polygraph test.

After arriving in Chicago to assist Voight and the team with a rape/murder case that has distinct similarities to a decade-old case from New York, Sgt. Benson asks Fin and Amaro to help; the prime suspect asks for a meeting with Lindsay.

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.

While completing a task assigned by headquarters, Boden makes an unforeseen connection; Gallo is forced to make a surprise rescue of one of their own when the firehouse is called to the site of a construction explosion; Mouch reignites an old feud.

When Firehouse 51 is called to the scene of a dangerous blaze inside a 10-story storage unit, Herrmann and Cruz find themselves trapped inside a freight elevator with all communications cut off.

Gallo makes a split-second decision during a dangerous fire rescue, leaving Casey steaming that his direct orders weren't obeyed; Kidd feels a strain in her relationship with Severide; Brett and Mackey search for answers after some suspicious calls.

A fire at a homeless encampment leaves Severide and Casey searching for answers; Cruz is shaken up after a close call; Ritter lends a helping hand to a victim.

A call to a familiar location brings back mixed emotions for Severide; Herrmann heads out for a vacation; Casey is not thrilled with his replacement.

Mouch, Gallo, Ritter and Mackey report for training; a nasty blow to the head brings Casey unimaginable pain.

A series of suspicious fires sends 51 on a search for the cause; Casey continues down a troubling path; Mouch is looking to make his long-awaited dream come true.

While completing a task assigned by headquarters, Boden makes an unforeseen connection; Gallo is forced to make a surprise rescue of one of their own when the firehouse is called to the site of a construction explosion; Mouch reignites an old feud.

When Firehouse 51 is called to the scene of a dangerous blaze inside a 10-story storage unit, Herrmann and Cruz find themselves trapped inside a freight elevator with all communications cut off.

Gallo makes a split-second decision during a dangerous fire rescue, leaving Casey steaming that his direct orders weren't obeyed; Kidd feels a strain in her relationship with Severide; Brett and Mackey search for answers after some suspicious calls.

A fire at a homeless encampment leaves Severide and Casey searching for answers; Cruz is shaken up after a close call; Ritter lends a helping hand to a victim.

A call to a familiar location brings back mixed emotions for Severide; Herrmann heads out for a vacation; Casey is not thrilled with his replacement.

Mouch, Gallo, Ritter and Mackey report for training; a nasty blow to the head brings Casey unimaginable pain.

A series of suspicious fires sends 51 on a search for the cause; Casey continues down a troubling path; Mouch is looking to make his long-awaited dream come true.

While completing a task assigned by headquarters, Boden makes an unforeseen connection; Gallo is forced to make a surprise rescue of one of their own when the firehouse is called to the site of a construction explosion; Mouch reignites an old feud.

When Firehouse 51 is called to the scene of a dangerous blaze inside a 10-story storage unit, Herrmann and Cruz find themselves trapped inside a freight elevator with all communications cut off.

Gallo makes a split-second decision during a dangerous fire rescue, leaving Casey steaming that his direct orders weren't obeyed; Kidd feels a strain in her relationship with Severide; Brett and Mackey search for answers after some suspicious calls.

A fire at a homeless encampment leaves Severide and Casey searching for answers; Cruz is shaken up after a close call; Ritter lends a helping hand to a victim.

A call to a familiar location brings back mixed emotions for Severide; Herrmann heads out for a vacation; Casey is not thrilled with his replacement.

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

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

A handyman, living rent-free in the home of a generous friend, grows increasingly paranoid about his neighbors; filming them constantly and fighting with them incessantly until conflict escalates out of control and culminates in explosive violence.

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

A young man is forced to infiltrate a research facility to memorize the design of a new "smart gun.".

A handyman, living rent-free in the home of a generous friend, grows increasingly paranoid about his neighbors; filming them constantly and fighting with them incessantly until conflict escalates out of control and culminates in explosive violence.

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

A young man is forced to infiltrate a research facility to memorize the design of a new "smart gun.".

A handyman, living rent-free in the home of a generous friend, grows increasingly paranoid about his neighbors; filming them constantly and fighting with them incessantly until conflict escalates out of control and culminates in explosive violence.

A young man is forced to infiltrate a research facility to memorize the design of a new "smart gun.".

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

A new recruit with ties to the CFD tests Severide's patience; Violet receives a mysterious note that sends her and Brett on a hunt for the person who wrote it.

While Mouch makes an incredible save, all eyes are on a mystery man who helped save his neighbor; Casey worries about his future at the CFD.

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.

Martin and Vicki must pull off the con of a lifetime to save their skins and their company.

When Battle's arrested, Bumpy must find a way to spring him and find the mole; Bumpy discovers that Malcolm X has more enemies than they thought.

Bumpy uncovers a CIA plot to assassinate Malcolm X and Che Guevara at the United Nations; Malcolm writes his autobiography; Olympia utilizes Father Louis to get out of trouble.

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.

Martin and Vicki must pull off the con of a lifetime to save their skins and their company.

When Battle's arrested, Bumpy must find a way to spring him and find the mole; Bumpy discovers that Malcolm X has more enemies than they thought.

Bumpy uncovers a CIA plot to assassinate Malcolm X and Che Guevara at the United Nations; Malcolm writes his autobiography; Olympia utilizes Father Louis to get out of trouble.

Two women with a shared wall between their townhouses become increasingly volatile with each other; food fights, physical altercations and vandalism come to a bloody climax.

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

Team One races to track down an armored truck that has vanished.

Two women with a shared wall between their townhouses become increasingly volatile with each other; food fights, physical altercations and vandalism come to a bloody climax.

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

Team One races to track down an armored truck that has vanished.

Two women with a shared wall between their townhouses become increasingly volatile with each other; food fights, physical altercations and vandalism come to a bloody climax.

Team One races to track down an armored truck that has vanished.

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

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 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.

Halstead arranges a great deal on a wedding venue; Manning and Elsa treat an ill pregnant woman convinced that God will save her; the staff is conflicted about the law-breaking father of a 5-year-old patient; Rhodes opens his hybrid OR early.

Mary Jane searches Davis' office to differentiate real intel from planted misinformation; nearly caught, Mary Jane hurries to write notes for Jericho to deliver to their cohort.

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.

Jon Hamm gets fans ready for season 2 of "Your Friends & Neighbors"; Amanda Peet lets us in on her "Fantasy Life.".

Mary Jane searches Davis' office to differentiate real intel from planted misinformation; nearly caught, Mary Jane hurries to write notes for Jericho to deliver to their cohort.

A former cop is moving into a close-knit neighborhood; conflict arises with the whole community over dogs, noise, and other disturbances that keep piling on and ratcheting up until a boiling point is reached, guns are drawn, and blood is spilled.

A private school owner is kidnapped.

While Dean and Clark go on a ride-along, a shootout breaks out at a drug den.

A former cop is moving into a close-knit neighborhood; conflict arises with the whole community over dogs, noise, and other disturbances that keep piling on and ratcheting up until a boiling point is reached, guns are drawn, and blood is spilled.

A private school owner is kidnapped.

While Dean and Clark go on a ride-along, a shootout breaks out at a drug den.

A former cop is moving into a close-knit neighborhood; conflict arises with the whole community over dogs, noise, and other disturbances that keep piling on and ratcheting up until a boiling point is reached, guns are drawn, and blood is spilled.

While Dean and Clark go on a ride-along, a shootout breaks out at a drug den.

A private school owner is kidnapped.

Hen fears for Karen's life when an explosion rocks her science lab on the day she brings Denny to work with her.

Athena and the 118 race to the rescue when a fading movie star is plagued by a series of near-death experiences.

The 118 race to the rescue to a renaissance faire; an overbearing boss is poisoned; Athena fears for May's life when she encounters a disturbed young man; Uncle Buck babysits young Jee-Yun as Maddie and Chimney begin house-hunting.

The Santa Ana winds bring in a variety of weirder-than-usual emergencies; a family dog retrieves a severed hand; a young woman sleep-drives into the station; Denny questions Hen and Karen about his biological parents.

A dry thunderstorm rolls over Los Angeles, bringing in a series of lightning strike emergencies for the 118 and leaves a first responder's life hanging in the balance; Chimney get a surprise from a visiting Albert.