Chief Boden faces accusations that he abandoned a homeless man to die in a warehouse fire; Severide helps an elderly woman; Detective Voight tries to convince Casey not to testify against his son; Shay has to face her ex during a call.

Casey must face the consequences of confronting Detective Voight; Dawson faces disciplinary action; Severide reaches out to an old friend about his injury.

Dawson receives help from a girl she saved; Detective Voight is determined to get Casey to retract his statement.

The Firehouse 51 crew has a Thanksgiving to remember when drugs, a car accident, and a gang shooting get in the way of traditional holiday pastimes.

A single woman and her two young sons believe they have found a perfect new apartment, but their overbearing landlord and neighbor soon turns their idyllic situation into a living hell of arguments and intimidation that finally ends in bloodshed.

Andy considers leaving town for a four-month-long undercover project; Jarvis reveals that the division will be restructured.

A violent patient takes a guard hostage and injures a fellow patient.

A single woman and her two young sons believe they have found a perfect new apartment, but their overbearing landlord and neighbor soon turns their idyllic situation into a living hell of arguments and intimidation that finally ends in bloodshed.

Andy considers leaving town for a four-month-long undercover project; Jarvis reveals that the division will be restructured.

A violent patient takes a guard hostage and injures a fellow patient.

A single woman and her two young sons believe they have found a perfect new apartment, but their overbearing landlord and neighbor soon turns their idyllic situation into a living hell of arguments and intimidation that finally ends in bloodshed.

Andy considers leaving town for a four-month-long undercover project; Jarvis reveals that the division will be restructured.

A violent patient takes a guard hostage and injures a fellow patient.

Cruz struggles with guilt and decides to make a confession to Casey; Severide asks Dawson for help with his injury; Herrmann is faced with an unpleasant business deal.

Severide finally decides to discuss his injury with Chief Boden; Casey deals with family issues; Dawson responds to a rescue call and realizes a young girl is the only survivor.

A man dies in a fire set by a troubled teenager; Severide contacts his father; Otis fills in for some shifts at the slowest firehouse in the city; Shay and Dawson wind up in a bad situation.

Severide realizes he shares a similar past with the lieutenant who has been helping out at the firehouse; Dawson shares a secret with Shay; Casey faces family issues.

Dawson turns to an unlikely source for assistance as she tries to help her brother; Severide does a favor for Lt. Whaley; Herrmann and Otis make tough discoveries about their silent partner.

Cruz puts himself and his fellow firefighters in danger; Casey tries to resolve issues with his sister and mother; the team assists the bomb squad with a dangerous call.

A protection officer and an MI6 operative team up after a terrorist attack; they suspect a mole as they race to thwart a larger conspiracy threatening Paris.

Cruz struggles with guilt and decides to make a confession to Casey; Severide asks Dawson for help with his injury; Herrmann is faced with an unpleasant business deal.

Severide finally decides to discuss his injury with Chief Boden; Casey deals with family issues; Dawson responds to a rescue call and realizes a young girl is the only survivor.

A man dies in a fire set by a troubled teenager; Severide contacts his father; Otis fills in for some shifts at the slowest firehouse in the city; Shay and Dawson wind up in a bad situation.

Severide realizes he shares a similar past with the lieutenant who has been helping out at the firehouse; Dawson shares a secret with Shay; Casey faces family issues.

Dawson turns to an unlikely source for assistance as she tries to help her brother; Severide does a favor for Lt. Whaley; Herrmann and Otis make tough discoveries about their silent partner.

Cruz puts himself and his fellow firefighters in danger; Casey tries to resolve issues with his sister and mother; the team assists the bomb squad with a dangerous call.

A protection officer and an MI6 operative team up after a terrorist attack; they suspect a mole as they race to thwart a larger conspiracy threatening Paris.

Cruz struggles with guilt and decides to make a confession to Casey; Severide asks Dawson for help with his injury; Herrmann is faced with an unpleasant business deal.

Once-friendly neighbors on a mountain road become sworn enemies after one family calls police about a theft -- violating the unspoken tradition of leaving authorities out of disputes; years of conflict finally culminate with shots fired.

Andy is left stranded on the side of the road with a dying man and no way to get help on her wedding day.

A bold heist at a stadium lures Team One into an ex-cop's violent plan to defeat the man he blames for ruining his life.

Once-friendly neighbors on a mountain road become sworn enemies after one family calls police about a theft -- violating the unspoken tradition of leaving authorities out of disputes; years of conflict finally culminate with shots fired.

Andy is left stranded on the side of the road with a dying man and no way to get help on her wedding day.

A bold heist at a stadium lures Team One into an ex-cop's violent plan to defeat the man he blames for ruining his life.

Once-friendly neighbors on a mountain road become sworn enemies after one family calls police about a theft -- violating the unspoken tradition of leaving authorities out of disputes; years of conflict finally culminate with shots fired.

Andy is left stranded on the side of the road with a dying man and no way to get help on her wedding day.

A bold heist at a stadium lures Team One into an ex-cop's violent plan to defeat the man he blames for ruining his life.

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.

A traumatic multi-car accident during a blizzard stretches the hospital staff to the limit; Rhodes and Latham make difficult decisions in triage; Choi handles a severely burned patient who has a final request.

Dr. Rhodes cares for a trauma patient whose accident is a media sensation; a grieving widower relies on a superhero costume; April pushes Halstead to use unproven medications to help a patient with no other options.

Dr. Reese is contacted for help by a troubled teen in a psychiatric facility; Dr. Manning tries to help parents make a decision about their comatose daughter's surprise pregnancy; April begins to deal with repercussions from her personal life.

Doctors and nurses deal with a staff member's suicide; Choi and Halstead face off over how to treat a patient who is experiencing stroke symptoms; Manning treats a boy who fell into the river; Rhodes examines the man who saved Dr. Manning's 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.

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.

A traumatic multi-car accident during a blizzard stretches the hospital staff to the limit; Rhodes and Latham make difficult decisions in triage; Choi handles a severely burned patient who has a final request.

Dr. Rhodes cares for a trauma patient whose accident is a media sensation; a grieving widower relies on a superhero costume; April pushes Halstead to use unproven medications to help a patient with no other options.

Dr. Reese is contacted for help by a troubled teen in a psychiatric facility; Dr. Manning tries to help parents make a decision about their comatose daughter's surprise pregnancy; April begins to deal with repercussions from her personal life.

Doctors and nurses deal with a staff member's suicide; Choi and Halstead face off over how to treat a patient who is experiencing stroke symptoms; Manning treats a boy who fell into the river; Rhodes examines the man who saved Dr. Manning's 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.

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.

An Army veteran delivers a parcel to his neighbor, but instead of receiving gratitude, he ignites a war between the two military men that spirals out of control, until the feud finally ends in a hail of bullets.

Andy faces a volatile gunman after a high-stakes takedown of a suspect does not go as planned.

Spike finds himself held at gunpoint; the team races to a shots-fired call.

An Army veteran delivers a parcel to his neighbor, but instead of receiving gratitude, he ignites a war between the two military men that spirals out of control, until the feud finally ends in a hail of bullets.

Andy faces a volatile gunman after a high-stakes takedown of a suspect does not go as planned.

Spike finds himself held at gunpoint; the team races to a shots-fired call.

An Army veteran delivers a parcel to his neighbor, but instead of receiving gratitude, he ignites a war between the two military men that spirals out of control, until the feud finally ends in a hail of bullets.

Andy faces a volatile gunman after a high-stakes takedown of a suspect does not go as planned.

Spike finds himself held at gunpoint; the team races to a shots-fired call.

The first responders race to rescue victims trapped in various tight spots; Athena contemplates accepting a promotion that will take her out of the field; Chimney finally deals with the aftermath of his near fatal car crash.

Maddie goes on a ride-along with Athena; Hen must figure out how to save her family from permanently falling apart; the first responders deal with emergencies both at a military funeral and a movie theater.

The first responders unwittingly become the subject of an eager reporter's first on-air assignment; Athena prepares for May's homecoming dance; the team responds to emergencies at an eating contest, a bodybuilding competition and a toddler pageant.

Halloween finds the first responders racing to the rescue at a cemetery, a haunted hayride and a spooky parade; Maddie thinks she has received a.

Buck jumps back into the dating scene but fears he will return to his old ways; a woman goes to great extremes on a freeway overpass to get the attention of her husband; a couple have a car accident on their wedding day.

Hen relives her evolution into the firefighter she is today as she recalls the first times she met Chimney and Athena.

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

The first responders race to rescue victims trapped in various tight spots; Athena contemplates accepting a promotion that will take her out of the field; Chimney finally deals with the aftermath of his near fatal car crash.

Maddie goes on a ride-along with Athena; Hen must figure out how to save her family from permanently falling apart; the first responders deal with emergencies both at a military funeral and a movie theater.

The first responders unwittingly become the subject of an eager reporter's first on-air assignment; Athena prepares for May's homecoming dance; the team responds to emergencies at an eating contest, a bodybuilding competition and a toddler pageant.

Halloween finds the first responders racing to the rescue at a cemetery, a haunted hayride and a spooky parade; Maddie thinks she has received a.

Buck jumps back into the dating scene but fears he will return to his old ways; a woman goes to great extremes on a freeway overpass to get the attention of her husband; a couple have a car accident on their wedding day.

Hen relives her evolution into the firefighter she is today as she recalls the first times she met Chimney and Athena.

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

The first responders race to rescue victims trapped in various tight spots; Athena contemplates accepting a promotion that will take her out of the field; Chimney finally deals with the aftermath of his near fatal car crash.

The unofficial mayor of an idyllic suburban street locks horns with the new neighbor who shows no respect for local values; disagreements escalate to arguments, threats, and property damage, ending in brutal violence that shatters two families.

The rookies hunt for a violent escaped convict; Andy and her training officer search for a missing informant.

Parker is confronted with devastating news; an explosion traps Jules.

The unofficial mayor of an idyllic suburban street locks horns with the new neighbor who shows no respect for local values; disagreements escalate to arguments, threats, and property damage, ending in brutal violence that shatters two families.

The rookies hunt for a violent escaped convict; Andy and her training officer search for a missing informant.

Parker is confronted with devastating news; an explosion traps Jules.

The unofficial mayor of an idyllic suburban street locks horns with the new neighbor who shows no respect for local values; disagreements escalate to arguments, threats, and property damage, ending in brutal violence that shatters two families.

The rookies hunt for a violent escaped convict; Andy and her training officer search for a missing informant.

Parker is confronted with devastating news; an explosion traps Jules.

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. Choi and Dr. Marcel don't see eye to eye over the treatment of a patient's chronic pain; rumors circulate about Maggie; Dr. Manning works to help a young boy, but she is challenged by his parents, who believe in only using holistic remedies.

Dr. Manning's actions with a recent patient lead to serious repercussions; April and Noah disagree over a patient who is injured after a beating; Dr. Charles is visited by a childhood friend.

Dr. Charles and Dr. Halstead sink their teeth into a bloodthirsty case; Dr. Marcel and Maggie throw a traditional crawfish boil for the staff; a new relationship blossoms while another is left on rocky ground.

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. Choi and Dr. Marcel don't see eye to eye over the treatment of a patient's chronic pain; rumors circulate about Maggie; Dr. Manning works to help a young boy, but she is challenged by his parents, who believe in only using holistic remedies.

Dr. Manning's actions with a recent patient lead to serious repercussions; April and Noah disagree over a patient who is injured after a beating; Dr. Charles is visited by a childhood friend.

Dr. Charles and Dr. Halstead sink their teeth into a bloodthirsty case; Dr. Marcel and Maggie throw a traditional crawfish boil for the staff; a new relationship blossoms while another is left on rocky ground.

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.