Casey reunites with a former colleague; Dawson and Brett serve their time in retraining; Severide tries to fix what's going on with Anna.

Chief Anderson feels his authority was undercut after Chief Boden makes a decision that overrides Anderson's when both squads respond to the scene of a dangerous accident; Severide ponders a lifechanging decision; Herrmann does a good deed.

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

Traci worries that she mishandled the investigation into a car accident that yielded a dead body; Chris realizes he has feelings for Gail.

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

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

Traci worries that she mishandled the investigation into a car accident that yielded a dead body; Chris realizes he has feelings for Gail.

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

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

Traci worries that she mishandled the investigation into a car accident that yielded a dead body; Chris realizes he has feelings for Gail.

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

Will confronts a moral decision when his former teacher faces a life-threatening disease; Rhodes disagrees with the father of a young patient about a risky procedure; an unusual case causes Sarah to recall Jason Wheeler's suicide.

Doctors must diagnose patients without the aid of technology after a hacker shuts down the hospital computer system; Goodwin gets a visit from her ex husband Bert and his new girlfriend; Choi and Noah have to remove a bullet from a gunshot victim.

Dr. Halstead's father is admitted to the hospital against his wishes; Dr. Charles gets involved when his daughter's strange behavior continues to intensify; Dr. Manning feels the impact of being a working mother.

A mother is desperate to help her daughter beat cancer; Dr. Charles asks Sarah to conduct his daughter Robin's psych evaluation; Dr. Choi puts pressure on Noah when a residency spot becomes available.

Dr. Rhodes challenges Dr. Charles and other hospital staff over treatment for Robin; Dr. Manning seeks help from Detective Halstead when a sensitive case involving a young girl turns into a crime; Goodwin helps a friend in distress.

An audacious new doctor arrives at Chicago Med; Dr. Halstead and Dr. Manning team up to diagnose a Syrian refugee who has no medical record; Robin is admitted back into the hospital; Noah hosts a graduation party.

The doctors of Chicago Med try to bring justice to the perpetrator in the shooting of Dr. Charles; Robin is discharged from the rehabilitation center, but Dr. Rhodes worries that her problems are not quite resolved; Maggie sticks up for a patient.

Will confronts a moral decision when his former teacher faces a life-threatening disease; Rhodes disagrees with the father of a young patient about a risky procedure; an unusual case causes Sarah to recall Jason Wheeler's suicide.

Doctors must diagnose patients without the aid of technology after a hacker shuts down the hospital computer system; Goodwin gets a visit from her ex husband Bert and his new girlfriend; Choi and Noah have to remove a bullet from a gunshot victim.

Dr. Halstead's father is admitted to the hospital against his wishes; Dr. Charles gets involved when his daughter's strange behavior continues to intensify; Dr. Manning feels the impact of being a working mother.

A mother is desperate to help her daughter beat cancer; Dr. Charles asks Sarah to conduct his daughter Robin's psych evaluation; Dr. Choi puts pressure on Noah when a residency spot becomes available.

Dr. Rhodes challenges Dr. Charles and other hospital staff over treatment for Robin; Dr. Manning seeks help from Detective Halstead when a sensitive case involving a young girl turns into a crime; Goodwin helps a friend in distress.

An audacious new doctor arrives at Chicago Med; Dr. Halstead and Dr. Manning team up to diagnose a Syrian refugee who has no medical record; Robin is admitted back into the hospital; Noah hosts a graduation party.

The doctors of Chicago Med try to bring justice to the perpetrator in the shooting of Dr. Charles; Robin is discharged from the rehabilitation center, but Dr. Rhodes worries that her problems are not quite resolved; Maggie sticks up for a patient.

Will confronts a moral decision when his former teacher faces a life-threatening disease; Rhodes disagrees with the father of a young patient about a risky procedure; an unusual case causes Sarah to recall Jason Wheeler's suicide.

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

Andy answers a domestic disturbance call to find the social worker on the scene is her estranged mother; Sam, Nick, Chris and Gail search for a mother and her two children; a stash of guns recovered by Detective Barber turns up on the streets.

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.

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

Andy answers a domestic disturbance call to find the social worker on the scene is her estranged mother; Sam, Nick, Chris and Gail search for a mother and her two children; a stash of guns recovered by Detective Barber turns up on the streets.

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.

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

Andy answers a domestic disturbance call to find the social worker on the scene is her estranged mother; Sam, Nick, Chris and Gail search for a mother and her two children; a stash of guns recovered by Detective Barber turns up on the streets.

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.

The 118 responds to calls dealing with parents and their children, including a disastrous birthday party thrown by a mommy blogger; Athena and Michael talk to May about her past suicide attempt; Chimney and Maddie adjust to life with their newborn.

The members of the 118 rush to the site of a hit-and-run that leaves a familiar face in critical condition; with Buck's help, Athena investigates the case of a missing woman; Josh recalls an emergency in 2006 that led him to become a first responder.

When a famous mystery writer dies, Athena, Bobby and the 118 respond to the chaos caused by a citywide manhunt for buried treasure the author left behind.

The members of the 118 make calls to save a bridezilla at a disastrous wedding; Hen plays medical detective when her mother falls ill; Eddie and Christopher receive a visit from Carla; Athena uncovers a secret Bobby has been hiding.

Athena and the 118 are on high alert when a sniper is targeting members of the LAFD; Maddie makes a life decision.

A series of ransomware threats leads to emergencies for the 118, including a helicopter crash at a hospital and an air traffic control tower system failure; the case of the realtor serial rapist goes to trial.

The 118 springs into action when a citywide blackout and a record heat wave causes mayhem in Los Angeles; Chimney confides in Hen about Maddie's condition; Athena's worst nightmare comes true.

The 118 responds to calls dealing with parents and their children, including a disastrous birthday party thrown by a mommy blogger; Athena and Michael talk to May about her past suicide attempt; Chimney and Maddie adjust to life with their newborn.

The members of the 118 rush to the site of a hit-and-run that leaves a familiar face in critical condition; with Buck's help, Athena investigates the case of a missing woman; Josh recalls an emergency in 2006 that led him to become a first responder.

When a famous mystery writer dies, Athena, Bobby and the 118 respond to the chaos caused by a citywide manhunt for buried treasure the author left behind.

The members of the 118 make calls to save a bridezilla at a disastrous wedding; Hen plays medical detective when her mother falls ill; Eddie and Christopher receive a visit from Carla; Athena uncovers a secret Bobby has been hiding.

Athena and the 118 are on high alert when a sniper is targeting members of the LAFD; Maddie makes a life decision.

A series of ransomware threats leads to emergencies for the 118, including a helicopter crash at a hospital and an air traffic control tower system failure; the case of the realtor serial rapist goes to trial.

The 118 springs into action when a citywide blackout and a record heat wave causes mayhem in Los Angeles; Chimney confides in Hen about Maddie's condition; Athena's worst nightmare comes true.

The 118 responds to calls dealing with parents and their children, including a disastrous birthday party thrown by a mommy blogger; Athena and Michael talk to May about her past suicide attempt; Chimney and Maddie adjust to life with their newborn.

In Elyria, Ohio, two neighboring families live in harmony for decades, then their friendly coexistence devolves into acrimony, accusations and violence.

Oliver Shaw's teenage daughter, Izzy, witnesses the brutal stabbing of a homeless squatter; when Izzy goes missing, officers rush to track her down.

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

In Elyria, Ohio, two neighboring families live in harmony for decades, then their friendly coexistence devolves into acrimony, accusations and violence.

Oliver Shaw's teenage daughter, Izzy, witnesses the brutal stabbing of a homeless squatter; when Izzy goes missing, officers rush to track her down.

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

In Elyria, Ohio, two neighboring families live in harmony for decades, then their friendly coexistence devolves into acrimony, accusations and violence.

Oliver Shaw's teenage daughter, Izzy, witnesses the brutal stabbing of a homeless squatter; when Izzy goes missing, officers rush to track her down.

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

Dr. Manning goes to extreme measures to help a fearful pregnant woman; Dr. Choi and April try to strike a balance at work; Dr. Charles and Dr. Reese continue to disagree about their patients.

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. Manning goes to extreme measures to help a fearful pregnant woman; Dr. Choi and April try to strike a balance at work; Dr. Charles and Dr. Reese continue to disagree about their patients.

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. Manning goes to extreme measures to help a fearful pregnant woman; Dr. Choi and April try to strike a balance at work; Dr. Charles and Dr. Reese continue to disagree about their patients.

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

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.

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.

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

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.

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.

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

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

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.

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.

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

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.

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.

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

A Chinese maintenance man (Jackie Chan) instructs an American boy (Jaden Smith) in the art of kung fu to help the youth face down bullies at his new school.

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

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.

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.

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

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.

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.

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