McLeod pushes Boden toward an early retirement and chooses a potential replacement; all make known their disdain for the mole; Shay enjoys a full social life.

Severide comes across a boy in need of help while out on a jog; Boden and McLeod clash over the future of the firehouse; Mouch and Greg Sullivan debate on Otis' podcast.

The firehouse crew goes to the scene of a railroad accident; Boden must make a big decision about his future; Severide learns more about the woman he saw with his father; Shay and Dawson continue to butt heads.

The shooting of a child in their neighborhood forces Cruz and his brother to think about the gang; Isabella gets Mills to dress up for a gala; Casey feels sad he will be seeing Dawson less; Shay gets in deeper with Devon.

Boden tries to keep the firehouse from closing; the romance between Dawson and Casey grows; Cruz worries for his brother's safety; Severide and Katie make up for lost time.

A serial killer in Spokane, Wash. murders prostitutes and leaves a bag with a smiley face on the victim's head.

Officials look to state-of-the-art DNA analysis to help capture a serial killer in the Louisiana State University area of Baton Rouge.

A couple moves to an idyllic California beach town and hits it off with their new neighbors, then one of the wives descends into drugs and madness, terrorizing the other.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

The CEO of a mortgage company is taken hostage by three men; the team reluctantly looks for recruits to fill Jules' spot.

A couple moves to an idyllic California beach town and hits it off with their new neighbors, then one of the wives descends into drugs and madness, terrorizing the other.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

The CEO of a mortgage company is taken hostage by three men; the team reluctantly looks for recruits to fill Jules' spot.

A couple moves to an idyllic California beach town and hits it off with their new neighbors, then one of the wives descends into drugs and madness, terrorizing the other.

The CEO of a mortgage company is taken hostage by three men; the team reluctantly looks for recruits to fill Jules' spot.

Investigators work to solve a double homicide in the small town of Hudson, Wisc.

Casey tries to convince everyone he is healthy; Shay avoids the lawyer who wants to talk about Daryl's suicide; Otis and Katie grow closer; Boden helps a woman with a negligent landlord.

A drunken driver takes out a transformer, leaving the entire neighborhood without power on a frigid night; Casey continues to lie about his condition.

Severide must leave Lindsay and the Intelligence Unit to find Katie; Blackhawks players Brent Seabrook and Duncan Keith give Shay a tip; Casey gets more information about his head injuries; Dawson works to pass the physical test.

Severide becomes frustrated with the police; a girl is trapped in a donation bin; a fire breaks out in a 20-story building downtown.

Detective Lindsay calls in suspects in the disappearance of Katie's kidnapper; Jones struggles to fit in; Herrmann celebrates his 20th wedding anniversary.

Severide feels compelled to help a man he saved from a car accident; Casey and Boden struggle to deal with the orders from Jones' father; a call to duty affects the firehouse.

Fiona, Musa and Róisín investigate the next clue in the briefcase, a pair of blood-stained mixed martial arts gloves with a hidden metal gauze; Róisín suspects a link to a local criminal fighter.

In an effort to break Bumpy's bank, Chin fixes a bet, as a result, Bumpy owes the winners more than he can cover; police arrest Stella and Teddy for kissing; Elise looks toward the Nation of Islam in order to better herself.

Elijah Muhammed tours Malcolm X's mosque where he meets Elise and asks her to spy on Malcolm; Chin finds out Teddy is alive, leaving Ernie Nunzi to correct his mistake; Esther James sues Adam Clayton Powell Jr. for slander.

Severide must leave Lindsay and the Intelligence Unit to find Katie; Blackhawks players Brent Seabrook and Duncan Keith give Shay a tip; Casey gets more information about his head injuries; Dawson works to pass the physical test.

Severide becomes frustrated with the police; a girl is trapped in a donation bin; a fire breaks out in a 20-story building downtown.

Fiona, Musa and Róisín investigate the next clue in the briefcase, a pair of blood-stained mixed martial arts gloves with a hidden metal gauze; Róisín suspects a link to a local criminal fighter.

In an effort to break Bumpy's bank, Chin fixes a bet, as a result, Bumpy owes the winners more than he can cover; police arrest Stella and Teddy for kissing; Elise looks toward the Nation of Islam in order to better herself.

Elijah Muhammed tours Malcolm X's mosque where he meets Elise and asks her to spy on Malcolm; Chin finds out Teddy is alive, leaving Ernie Nunzi to correct his mistake; Esther James sues Adam Clayton Powell Jr. for slander.

When neighbors stand up to a bully after his dog bites their son, a grudge he's been nursing for decades finally explodes into a frenzy of violence.

Police must use forensic science to solve the mystery of a prominent businessman whose burnt body is discovered.

The SRU is called to what appears to be a home invasion turned into a standoff, but team members soon realize the hostage-taker is no stranger to the family.

When neighbors stand up to a bully after his dog bites their son, a grudge he's been nursing for decades finally explodes into a frenzy of violence.

Police must use forensic science to solve the mystery of a prominent businessman whose burnt body is discovered.

The SRU is called to what appears to be a home invasion turned into a standoff, but team members soon realize the hostage-taker is no stranger to the family.

When neighbors stand up to a bully after his dog bites their son, a grudge he's been nursing for decades finally explodes into a frenzy of violence.

The SRU is called to what appears to be a home invasion turned into a standoff, but team members soon realize the hostage-taker is no stranger to the family.

Police must use forensic science to solve the mystery of a prominent businessman whose burnt body is discovered.

Manning and Halstead must act fast to save the life of a physically abused wife; Choi and April are shocked to learn the truth about their 14-year-old cirrhosis patient; Rhodes and Lanik go head-to-head in the ER.

After a deadly chemical spill, the ED goes on lockdown, threatening the lives of several patients and leaving one of Med's own hanging in the balance; Rhodes and Manning must perform lifesaving surgeries.

Choi and Charles use trickery to help a patient with an itch she can't help but scratch; Halstead and Manning argue over a tattooed coma patient; Rhodes angers Goodwin by going against orders to save a patient in the hybrid OR.

Halstead and Manning's wedding day is interrupted when Halstead is forced to make a house call; Charles treats a woman who stabbed her husband; Choi and April deliver a breech baby; Rhodes and Bekker operate on an FBI witness.

A shooting outside the hospital injures April and leaves the ED shaken up; Halstead returns after a stint in the witness relocation program; Charles and Elsa have an emotional confrontation; Bekker is reluctant to attend an event honoring Rhodes.

Halstead takes heat for making an unauthorized move to treat his pregnant patient; Choi becomes personally invested when treating a homeless veteran; Rhodes and Bekker deal with a patient who desperately needs a liver transplant.

Manning and her three-year-old patient are trapped in a helicopter as the toddler's stats decline; Charles isn't sure Choi's alcoholic patient with liver failure has quite hit rock bottom.

Manning and Halstead must act fast to save the life of a physically abused wife; Choi and April are shocked to learn the truth about their 14-year-old cirrhosis patient; Rhodes and Lanik go head-to-head in the ER.

After a deadly chemical spill, the ED goes on lockdown, threatening the lives of several patients and leaving one of Med's own hanging in the balance; Rhodes and Manning must perform lifesaving surgeries.

Choi and Charles use trickery to help a patient with an itch she can't help but scratch; Halstead and Manning argue over a tattooed coma patient; Rhodes angers Goodwin by going against orders to save a patient in the hybrid OR.

Halstead and Manning's wedding day is interrupted when Halstead is forced to make a house call; Charles treats a woman who stabbed her husband; Choi and April deliver a breech baby; Rhodes and Bekker operate on an FBI witness.

A shooting outside the hospital injures April and leaves the ED shaken up; Halstead returns after a stint in the witness relocation program; Charles and Elsa have an emotional confrontation; Bekker is reluctant to attend an event honoring Rhodes.

Halstead takes heat for making an unauthorized move to treat his pregnant patient; Choi becomes personally invested when treating a homeless veteran; Rhodes and Bekker deal with a patient who desperately needs a liver transplant.

Manning and her three-year-old patient are trapped in a helicopter as the toddler's stats decline; Charles isn't sure Choi's alcoholic patient with liver failure has quite hit rock bottom.

Manning and Halstead must act fast to save the life of a physically abused wife; Choi and April are shocked to learn the truth about their 14-year-old cirrhosis patient; Rhodes and Lanik go head-to-head in the ER.

When a freewheeling family moves from California to the conservative enclave of Leesburg, Va., they get on the wrong side of one of their neighbors, and the conflict escalates until bullets fly and blood flows in the street.

A phantom white supremacist sect takes credits for bombings and bank robberies in Spokane, Wash., but FBI forensic photo analysts clears the picture.

The team discovers that the federal agent they are working with during the transport of a serial killer is secretly sabotaging their mission.

When a freewheeling family moves from California to the conservative enclave of Leesburg, Va., they get on the wrong side of one of their neighbors, and the conflict escalates until bullets fly and blood flows in the street.

A phantom white supremacist sect takes credits for bombings and bank robberies in Spokane, Wash., but FBI forensic photo analysts clears the picture.

The team discovers that the federal agent they are working with during the transport of a serial killer is secretly sabotaging their mission.

When a freewheeling family moves from California to the conservative enclave of Leesburg, Va., they get on the wrong side of one of their neighbors, and the conflict escalates until bullets fly and blood flows in the street.

The team discovers that the federal agent they are working with during the transport of a serial killer is secretly sabotaging their mission.

A phantom white supremacist sect takes credits for bombings and bank robberies in Spokane, Wash., but FBI forensic photo analysts clears the picture.

A skating mishap at an ice show; an accident involving a self-driving car; a fulfillment warehouse robot goes rogue; Eddie's after-hours fight club gets out of control; Hen struggles in her relationship with Karen.

The 118 responds to debris from a meteor shower crashing into an apartment building and a deadly fire caused by a hazardous waste truck crash; Hen struggles with guilt over her ambulance accident; Bobby introduces Eddie to an old friend.

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

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

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

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

Martin Best is a brilliant surgeon who abruptly leaves his illustrious career in Boston to become the general practitioner in a quaint East Coast fishing village where he spent summers as a child. Unfortunately, Martin's blunt and borderline rude bedside manner rubs the quirky, needy locals the wrong way, and he quickly alienates the town, even though he's all they've got. Although Martin can expertly address any medical ailment or mystery in this idiosyncratic town, he's really just desperate to be left the hell alone. Instead, he keeps getting dragged right smack into the middle of their personal chaos, feuds and fantasies. What the locals don't know is that Martin's terse demeanor masks a debilitating new phobia and deep-seated psychological issues that prevent him from experiencing true intimacy with anyone. But tenacity is the creed of everyone in their small village, and the people who live there may be exactly what the doctor ordered.

A skating mishap at an ice show; an accident involving a self-driving car; a fulfillment warehouse robot goes rogue; Eddie's after-hours fight club gets out of control; Hen struggles in her relationship with Karen.

The 118 responds to debris from a meteor shower crashing into an apartment building and a deadly fire caused by a hazardous waste truck crash; Hen struggles with guilt over her ambulance accident; Bobby introduces Eddie to an old friend.

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

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

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

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

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

Martin Best is a brilliant surgeon who abruptly leaves his illustrious career in Boston to become the general practitioner in a quaint East Coast fishing village where he spent summers as a child. Unfortunately, Martin's blunt and borderline rude bedside manner rubs the quirky, needy locals the wrong way, and he quickly alienates the town, even though he's all they've got. Although Martin can expertly address any medical ailment or mystery in this idiosyncratic town, he's really just desperate to be left the hell alone. Instead, he keeps getting dragged right smack into the middle of their personal chaos, feuds and fantasies. What the locals don't know is that Martin's terse demeanor masks a debilitating new phobia and deep-seated psychological issues that prevent him from experiencing true intimacy with anyone. But tenacity is the creed of everyone in their small village, and the people who live there may be exactly what the doctor ordered.

Seeking to make a fresh start in Las Vegas, a teacher and her son find themselves the targets of harassment and escalating intimidation by the woman who lives next door.

When the prime subject for four factory deaths has a perfect alibi, investigators use video analysis, timeline reconstruction and a 3-year old fingerprint to solve the crime.

The team is called to a robbery at a local store when two boys take hostages after their escape plan fails.

Seeking to make a fresh start in Las Vegas, a teacher and her son find themselves the targets of harassment and escalating intimidation by the woman who lives next door.

When the prime subject for four factory deaths has a perfect alibi, investigators use video analysis, timeline reconstruction and a 3-year old fingerprint to solve the crime.

The team is called to a robbery at a local store when two boys take hostages after their escape plan fails.

Seeking to make a fresh start in Las Vegas, a teacher and her son find themselves the targets of harassment and escalating intimidation by the woman who lives next door.

The team is called to a robbery at a local store when two boys take hostages after their escape plan fails.

When the prime subject for four factory deaths has a perfect alibi, investigators use video analysis, timeline reconstruction and a 3-year old fingerprint to solve the crime.

Halstead hides the theft of his gun from a suspicious Manning; tensions are still high between Connor and Bekker, who take a risk operating on an HIV-positive patient; Hank breaks down when he sees a patient from his past.

Connor, who is in hot water with the hospital's Oversight Committee, handles a gunshot victim who has unexpected ties to Halstead; Maggie feels guilty about the return of a former patient; Charles has an awkward first date.

After witnessing a pickup truck plow through a street fair, Natalie and Maggie must make tough decisions on the fly; at the hospital, doctors and nurses are on high alert with the influx of patients; Dr. Charles' ex-wife comes to town with news.

Halstead treats a woman on the verge of freezing to death; Dr. Charles' ex-wife receives some concerning news; Choi handles a lymphoma patient with viral meningitis and a complicated family; Manning makes a house call.

When a car unexpectedly smashes through the ambulance bay doors, Dr. Choi makes some difficult decisions in an effort to save a worker trapped beneath the wreckage and April, who's also in danger.

An alarming phone call prompts Rhodes to rush out of an important surgery; Halstead comes to the aid of an FBI agent who is brought into the ED; Manning and Choi find themselves on opposite sides of a disagreement over doctor-patient confidentiality.

The hospital goes into lockdown mode when a man with a gun holds medical staff hostage; Goodwin is forced to make a tough decision; Dr. Rhodes begins to realize his time with his father is getting short.

With the finale fast approaching, mentor Aurora James visits each finalist's hometown for a personal look at their lives and collections.

Connor, who is in hot water with the hospital's Oversight Committee, handles a gunshot victim who has unexpected ties to Halstead; Maggie feels guilty about the return of a former patient; Charles has an awkward first date.

After witnessing a pickup truck plow through a street fair, Natalie and Maggie must make tough decisions on the fly; at the hospital, doctors and nurses are on high alert with the influx of patients; Dr. Charles' ex-wife comes to town with news.

Halstead treats a woman on the verge of freezing to death; Dr. Charles' ex-wife receives some concerning news; Choi handles a lymphoma patient with viral meningitis and a complicated family; Manning makes a house call.

When a car unexpectedly smashes through the ambulance bay doors, Dr. Choi makes some difficult decisions in an effort to save a worker trapped beneath the wreckage and April, who's also in danger.

An alarming phone call prompts Rhodes to rush out of an important surgery; Halstead comes to the aid of an FBI agent who is brought into the ED; Manning and Choi find themselves on opposite sides of a disagreement over doctor-patient confidentiality.

The hospital goes into lockdown mode when a man with a gun holds medical staff hostage; Goodwin is forced to make a tough decision; Dr. Rhodes begins to realize his time with his father is getting short.

With the finale fast approaching, mentor Aurora James visits each finalist's hometown for a personal look at their lives and collections.

In Vancouver, Wash., a young couple's neighbor violates the strict codes of community conduct in their housing development.

Sixteen years after a college student is found raped and strangled on a buffalo bike path, DNA technology and other clues help catch the killer.

A couple kidnaps their baby from its adoptive parents and steals their car to flee the scene after changing their minds about giving the child up.

In Vancouver, Wash., a young couple's neighbor violates the strict codes of community conduct in their housing development.

Sixteen years after a college student is found raped and strangled on a buffalo bike path, DNA technology and other clues help catch the killer.

A couple kidnaps their baby from its adoptive parents and steals their car to flee the scene after changing their minds about giving the child up.

In Vancouver, Wash., a young couple's neighbor violates the strict codes of community conduct in their housing development.

A couple kidnaps their baby from its adoptive parents and steals their car to flee the scene after changing their minds about giving the child up.

Sixteen years after a college student is found raped and strangled on a buffalo bike path, DNA technology and other clues help catch the killer.

Nolan teams up with new night detective Pablo Armstrong for a murder investigation case that results in an unexpected reunion with a former love interest.

Officer Nolan navigates his relationship with Jessica and a developing rapport with Grace while working a high-stakes criminal case involving an undercover homeland security agent; Officer Chen meddles with Officer Bradford's love life.

Officer Nolan gets off to a rocky start after being introduced to his new training officer; Officer Bradford struggles to think of an appropriate birthday gift for Rachel; Officer Lopez finds herself navigating a case that triggers a personal memory.

The rookies are asked to develop their first confidential informants; Officer Chen's mother complicates her home life when she comes to stay with her.

An emergency alert of an impending missile attack sends Los Angeles into chaos and uncertainty, while the officers each try to keep the peace and deal with their own disasters.

John and Jessica's relationship gets a lot more complicated after she delivers some surprising news; Officer Bradford and Officer West are assigned a community policing project helping out the Watts Rams as volunteer coaches.

After carrying out a hit on his latest target, Angelo begins to realize his mind may be failing him as his two, completely separate lives are slowly crashing together.

Losing one's memory is a devastating hammer blow for anyone, but for Angelo, the stakes couldn't be higher. His hit man job would be perilous enough, but there's an added pressure: Angelo lives two totally separate lives - fearsome NYC hitman, and sleepy upstate Cooperstown photocopier salesman and father. Having built and maintained a brick wall between his two worlds, Angelo has seamlessly juggled and compartmentalized for years. But now that's all about to change, because Alzheimer's is a foe he can't outrun, and he knows too well how this ends, as his older brother is already lost to the condition.

Officer Nolan navigates his relationship with Jessica and a developing rapport with Grace while working a high-stakes criminal case involving an undercover homeland security agent; Officer Chen meddles with Officer Bradford's love life.

After carrying out a hit on his latest target, Angelo begins to realize his mind may be failing him as his two, completely separate lives are slowly crashing together.

Losing one's memory is a devastating hammer blow for anyone, but for Angelo, the stakes couldn't be higher. His hit man job would be perilous enough, but there's an added pressure: Angelo lives two totally separate lives - fearsome NYC hitman, and sleepy upstate Cooperstown photocopier salesman and father. Having built and maintained a brick wall between his two worlds, Angelo has seamlessly juggled and compartmentalized for years. But now that's all about to change, because Alzheimer's is a foe he can't outrun, and he knows too well how this ends, as his older brother is already lost to the condition.

An emergency alert of an impending missile attack sends Los Angeles into chaos and uncertainty, while the officers each try to keep the peace and deal with their own disasters.

John and Jessica's relationship gets a lot more complicated after she delivers some surprising news; Officer Bradford and Officer West are assigned a community policing project helping out the Watts Rams as volunteer coaches.

Officer Nolan kicks off his birthday by babysitting a crime scene at a law office; Officer Bradford and Officer West are set to receive special awards; Sgt. Grey rides patrol with Officer Harper after she requests an early annual evaluation.

Nolan teams up with new night detective Pablo Armstrong for a murder investigation case that results in an unexpected reunion with a former love interest.

A Texas playboy is murdered and police uncover x-rated photos, shocking videos and an object hidden inside the victim's body.

Phoenix police are faced with a unique serial killer team who get their thrills stalking and shooting innocent people at night.

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

Eddie's journey to rescue a boy from a well turns into a mission to save himself from his past.

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

The 118 races to rescue a little girl in a runaway hot air balloon and help with a city power outage caused by a hijacked tree-trimmer truck; Athena's investigation into the serial rapist case puts her life in jeopardy.

The 118 rush to save lives in the aftermath of a massive train derailment.

When the Hollywood Reservoir dam breaks, Bobby and the 118 race into action to save passengers on a city bus that has crashed into a building several stories in the air; the team adjusts to life as first responders during the pandemic.

In the aftermath of the dam break, massive mudslides wreak havoc throughout Los Angeles; Athena fights to save herself and an agoraphobic woman after her house collapses; a group of pregnant women trapped in a submerged house.

The team races to save a man under siege by his high-tech smart home; a yoga teacher loses her vision; Athena hunts down a bank robber disguised by COVID-19 protocols; members of the 118's crew prepare for an out-of-state mission.

Eddie's journey to rescue a boy from a well turns into a mission to save himself from his past.

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

The 118 races to rescue a little girl in a runaway hot air balloon and help with a city power outage caused by a hijacked tree-trimmer truck; Athena's investigation into the serial rapist case puts her life in jeopardy.

The 118 rush to save lives in the aftermath of a massive train derailment.

When the Hollywood Reservoir dam breaks, Bobby and the 118 race into action to save passengers on a city bus that has crashed into a building several stories in the air; the team adjusts to life as first responders during the pandemic.

In the aftermath of the dam break, massive mudslides wreak havoc throughout Los Angeles; Athena fights to save herself and an agoraphobic woman after her house collapses; a group of pregnant women trapped in a submerged house.

The team races to save a man under siege by his high-tech smart home; a yoga teacher loses her vision; Athena hunts down a bank robber disguised by COVID-19 protocols; members of the 118's crew prepare for an out-of-state mission.

Eddie's journey to rescue a boy from a well turns into a mission to save himself from his past.

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

The 118 races to rescue a little girl in a runaway hot air balloon and help with a city power outage caused by a hijacked tree-trimmer truck; Athena's investigation into the serial rapist case puts her life in jeopardy.

The 118 rush to save lives in the aftermath of a massive train derailment.

When the Hollywood Reservoir dam breaks, Bobby and the 118 race into action to save passengers on a city bus that has crashed into a building several stories in the air; the team adjusts to life as first responders during the pandemic.

A Texas playboy is murdered and police uncover x-rated photos, shocking videos and an object hidden inside the victim's body.

Phoenix police are faced with a unique serial killer team who get their thrills stalking and shooting innocent people at night.

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

A killer who leaves messages signed "Jack" terrorizes East Point, Ga.

Police discover a murdered teenage girl was involved in a love triangle.

Surprised Dawson receives a suicide note; Severide looks into Bloom's dark past; Shay and Casey search for a life-changing item.

A large explosion sends Chicago into chaos; the members of the firehouse are tested when one of their own goes missing in the blast.

A call to the field may throw a wrench in Dawson's plan to retake the firefighter exam; the firehouse welcomes a new addition; Boden makes a bold move.

A fire at a boarding school shakes up Lt. Severide; Lt. Casey tries to help Dawson; Mills looks into his father's past.

Boden pushes his team to pull it together in the aftermath of the explosion; Casey works to track down a missing Severide; Newhouse brings news about one of Mills' relatives; Herrmann and Otis come up with new goals.

Severide comes back to work, but isn't his usual self; Mills discovers more information about his father's family; Herrmann asks Molly investors to share ideas that could help turn the business around.

The members of Firehouse 51 and the Austin firehouse clash when trucks collide on the way to a call; Boden comes up with a plan to get Dawson her badge; Mills faces his past and future; the Molly's group hits a speed bump starting the food truck.

Surprised Dawson receives a suicide note; Severide looks into Bloom's dark past; Shay and Casey search for a life-changing item.

A large explosion sends Chicago into chaos; the members of the firehouse are tested when one of their own goes missing in the blast.

A call to the field may throw a wrench in Dawson's plan to retake the firefighter exam; the firehouse welcomes a new addition; Boden makes a bold move.

A fire at a boarding school shakes up Lt. Severide; Lt. Casey tries to help Dawson; Mills looks into his father's past.

Boden pushes his team to pull it together in the aftermath of the explosion; Casey works to track down a missing Severide; Newhouse brings news about one of Mills' relatives; Herrmann and Otis come up with new goals.

Severide comes back to work, but isn't his usual self; Mills discovers more information about his father's family; Herrmann asks Molly investors to share ideas that could help turn the business around.

The members of Firehouse 51 and the Austin firehouse clash when trucks collide on the way to a call; Boden comes up with a plan to get Dawson her badge; Mills faces his past and future; the Molly's group hits a speed bump starting the food truck.

Surprised Dawson receives a suicide note; Severide looks into Bloom's dark past; Shay and Casey search for a life-changing item.

A large explosion sends Chicago into chaos; the members of the firehouse are tested when one of their own goes missing in the blast.

A call to the field may throw a wrench in Dawson's plan to retake the firefighter exam; the firehouse welcomes a new addition; Boden makes a bold move.

A fire at a boarding school shakes up Lt. Severide; Lt. Casey tries to help Dawson; Mills looks into his father's past.

Boden pushes his team to pull it together in the aftermath of the explosion; Casey works to track down a missing Severide; Newhouse brings news about one of Mills' relatives; Herrmann and Otis come up with new goals.

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

A killer who leaves messages signed "Jack" terrorizes East Point, Ga.

In Oregon, a couple learns their new neighbor has a deadly past, then relations sour, tempers flare and blood is spilled.

Todd Kendhammer claims his wife was killed in a car accident; the forensic evidence doesn't back him up; when a new defense team, known for working on the Steve Avery case is hired, they bring in their own forensic experts who contradict the case.

The SRU is called in when a bank employee whose wife is being held captive hacks into the computer system to steal money to pay off her captors.

In Oregon, a couple learns their new neighbor has a deadly past, then relations sour, tempers flare and blood is spilled.

Todd Kendhammer claims his wife was killed in a car accident; the forensic evidence doesn't back him up; when a new defense team, known for working on the Steve Avery case is hired, they bring in their own forensic experts who contradict the case.

The SRU is called in when a bank employee whose wife is being held captive hacks into the computer system to steal money to pay off her captors.

In Oregon, a couple learns their new neighbor has a deadly past, then relations sour, tempers flare and blood is spilled.

The SRU is called in when a bank employee whose wife is being held captive hacks into the computer system to steal money to pay off her captors.

Todd Kendhammer claims his wife was killed in a car accident; the forensic evidence doesn't back him up; when a new defense team, known for working on the Steve Avery case is hired, they bring in their own forensic experts who contradict the case.

Dawson tries to find balance with Lt. Casey; Mills deals with a future without the squad; Severide faces his demons; the Molly's crew meets with a city inspector.

Casey deals with the fallout from his sister's divorce; Dawson and Mills settle into their new roles at the station; Brett can't decide what she wants to do; the Molly's crew struggles to get the food truck started.

Casey helps his sister and faces down his corrupt brother-in-law; Brett goes out of her way to assist a mother in need; Mills learns about unlicensed private investigation; Dawson starts training with Herrmann.

Severide wants further investigation when a homeowner saved from a fire is found clutching a suspicious box; Molly's II needs a chef.

The members of the firehouse spring into action when a helicopter explodes over a densely populated area, scattering debris; a dangerous man corners Brett.

Dawson and Casey's relationship is tested as the team responds to a truck leaking hydrochloric acid in a busy intersection; Severide learns about Brittany's past; Mouch has dating troubles.

After receiving a mysterious package from her estranged father, L.A. divorce lawyer Fiona Sharpe travels to Ireland to uncover the truth-only to find herself entangled in a web of family secrets, lies, and danger.

Striking back at the Italians, Bumpy exploits Chin's dark past; Mayme and Elise put aside their differences and Bumpy sees his wife and children reunited before his war explodes.

Chin and Bonnano are at war in Harlem; Mayme asks Bumpy to create a will where Bumpy finds out he and Mayme never formally adopted Margaret; Malcolm X and Adam Clayton Powell Jr. go to D.C. for the March on Washington.

Casey helps his sister and faces down his corrupt brother-in-law; Brett goes out of her way to assist a mother in need; Mills learns about unlicensed private investigation; Dawson starts training with Herrmann.

Severide wants further investigation when a homeowner saved from a fire is found clutching a suspicious box; Molly's II needs a chef.

After receiving a mysterious package from her estranged father, L.A. divorce lawyer Fiona Sharpe travels to Ireland to uncover the truth-only to find herself entangled in a web of family secrets, lies, and danger.

Striking back at the Italians, Bumpy exploits Chin's dark past; Mayme and Elise put aside their differences and Bumpy sees his wife and children reunited before his war explodes.

Chin and Bonnano are at war in Harlem; Mayme asks Bumpy to create a will where Bumpy finds out he and Mayme never formally adopted Margaret; Malcolm X and Adam Clayton Powell Jr. go to D.C. for the March on Washington.

In Euclid, Ohio, a teenage boy develops a crush on the girl next door but gets rebuffed, setting the stage for murder.

When Leslie Neulander's death is declared accidental, forensic investigators sound the alarm that it was no accident.

The team must diffuse a volatile situation when a student pushed to the limit by bullies brings a gun to school.

In Euclid, Ohio, a teenage boy develops a crush on the girl next door but gets rebuffed, setting the stage for murder.

When Leslie Neulander's death is declared accidental, forensic investigators sound the alarm that it was no accident.

The team must diffuse a volatile situation when a student pushed to the limit by bullies brings a gun to school.

In Euclid, Ohio, a teenage boy develops a crush on the girl next door but gets rebuffed, setting the stage for murder.

The team must diffuse a volatile situation when a student pushed to the limit by bullies brings a gun to school.

When Leslie Neulander's death is declared accidental, forensic investigators sound the alarm that it was no accident.

Dr. Charles and Dr. Manning disagree on how to handle a patient who they discover is poisoning herself; Dr. Rhodes throws some serious accusations at Dr. Bekker; Dr. Halstead has suspicions about Natalie's new boyfriend; Dr. Choi tends to Bernie.

Caroline shares news that forces Dr. Charles to make a serious decision about their relationship; Maggie meets her sister's new boyfriend but danger may lie ahead; Dr. Rhodes experiences a huge loss; Dr. Choi and April face an unexpected challenge.

Dr. Charles and Caroline set some major plans; Ava fights to keep her relationship with Connor; Agent Lee informs Will of news that may put his life in danger.

Will and Natalie battle for their lives after a car accident; an investigation is launched following the suspicious death of Cornelius Rhodes; Maggie receives life-changing news; Dr. Charles cuts his honeymoon short to tend to a patient.

A power outage at Med puts multiple patients at risk and tests the skills of the staff and their enthusiastic med students; Natalie returns following her traumatic brain injury; Ethan and April wonder if a family is in their future.

Dr. Choi and Dr. Charles have difficult decisions to make as a dying man tries to preserve his life with a controversial scientific method; Dr. Marcel and April clash over how to handle a mysterious patient; Will questions Natalie's capabilities.

An entire apartment complex is forced into quarantine when cases of a deadly virus turn into an epidemic; P.D. chases a lead that could point to a case of bioterrorism, and Will gets dangerously close to the suspect.

Dr. Charles and Dr. Manning disagree on how to handle a patient who they discover is poisoning herself; Dr. Rhodes throws some serious accusations at Dr. Bekker; Dr. Halstead has suspicions about Natalie's new boyfriend; Dr. Choi tends to Bernie.

Caroline shares news that forces Dr. Charles to make a serious decision about their relationship; Maggie meets her sister's new boyfriend but danger may lie ahead; Dr. Rhodes experiences a huge loss; Dr. Choi and April face an unexpected challenge.

Dr. Charles and Caroline set some major plans; Ava fights to keep her relationship with Connor; Agent Lee informs Will of news that may put his life in danger.

Will and Natalie battle for their lives after a car accident; an investigation is launched following the suspicious death of Cornelius Rhodes; Maggie receives life-changing news; Dr. Charles cuts his honeymoon short to tend to a patient.

A power outage at Med puts multiple patients at risk and tests the skills of the staff and their enthusiastic med students; Natalie returns following her traumatic brain injury; Ethan and April wonder if a family is in their future.

Dr. Choi and Dr. Charles have difficult decisions to make as a dying man tries to preserve his life with a controversial scientific method; Dr. Marcel and April clash over how to handle a mysterious patient; Will questions Natalie's capabilities.

An entire apartment complex is forced into quarantine when cases of a deadly virus turn into an epidemic; P.D. chases a lead that could point to a case of bioterrorism, and Will gets dangerously close to the suspect.

Dr. Charles and Dr. Manning disagree on how to handle a patient who they discover is poisoning herself; Dr. Rhodes throws some serious accusations at Dr. Bekker; Dr. Halstead has suspicions about Natalie's new boyfriend; Dr. Choi tends to Bernie.

In Alden, N.Y., siblings who live next door to each other get into a conflict when a brother returns home; soon, they are at each other's throats and their family feud comes to a fiery end.

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.

The team must track down a young woman dying of a brain disease when she and her fiance go on a crime spree.

In Alden, N.Y., siblings who live next door to each other get into a conflict when a brother returns home; soon, they are at each other's throats and their family feud comes to a fiery end.

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.

The team must track down a young woman dying of a brain disease when she and her fiance go on a crime spree.

In Alden, N.Y., siblings who live next door to each other get into a conflict when a brother returns home; soon, they are at each other's throats and their family feud comes to a fiery end.

The team must track down a young woman dying of a brain disease when she and her fiance go on a crime spree.

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.

Athena investigates a mysterious murder during a neighborhood block party; the 118 rush to save lives endangered by a bomb threat; Chimney has a hard time keeping secrets when Maddie and Buck's parents come to town.

The 118 races to save the lives of workers trapped in a factory fire; Maddie reveals a painful family secret that causes Buck to confront his childhood and answer why he is the daredevil he is today.

The 118 has a day from hell with a never-ending series of bizarre emergency calls; a man tapes himself to a freeway billboard; a restaurant manager destroys his own business; Eddie feels a spark with Christopher's former teacher.

A man gets pinned under a Humvee; a garage band rocks out too hard; Michael notices strange behavior at a nearby apartment; Hen's mother unexpectedly arrives and announces she is moving to Los Angeles.