Nolan is given some life-changing news and invites Grace over for a home-cooked meal in his newly remodeled kitchen; each unit is tasked with following up on dormant cases in hopes of uncovering new leads.

Officers Nolan and Harper investigate a murder which may have national security implications; Officer Bradford must confront his past when he crosses paths with a homeless veteran.

Officer Nolan learns his identity has been stolen and could jeopardize his position as an officer; Sgt. Grey must testify at the parole hearing of the man who shot him and murdered his partner.

Officers Chen and Bradford respond to a call at the Los Angeles auditions of "American Idol" and Officer Chen ends up facing Ryan Seacrest and the judges; Chen befriends a reporter whose motives are not clear.

Officer Nolan's relationship with his first confidential informant is tested when he discovers her back on the street dealing drugs; Lucy's fear of dating following her abduction is beginning to threaten her friendship with Jackson.

Officers Nolan and Harper escort four juvenile offenders to a Scared Straight program at a correctional facility, but it quickly becomes a riotous situation; Nolan is uncertain about Grace after she fails to introduce him to her ex-husband.

Nolan takes his son's fiancée, Abigail, on a ride-along after she shows interest in becoming a police officer; Jackson's relationship becomes increasingly complicated.

The disappearance of millionaire Frank Black.

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

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

A family is killed, and the team searches for a drug dealer with a likely connection; Voight asks Vice Sgt. Sean McGrady for help.

Halstead goes undercover to stop an ex-military kidnapping crew from killing an innocent child.

When one of Voight's friends is found passed out in his hotel room with a dead Ukrainian girl, Intelligence discovers the murder is connected to a sting and Burgess' boyfriend.

The death of Judge Tommy Wells' daughter puts Intelligence on the track of a pill mill spreading into the suburbs of Chicago and the doctor enabling it; Voight discovers who's been leaking information from the 21st.

Halstead puts his career on the line to help solve a case with ties to his new girlfriend; Voight finally discovers the mole in his unit.

Burgess works with her first criminal informant to track down a ruthless pimp and break up his prostitution ring.

When Atwater disappears at the house of a convicted felon, the intelligence unit rallies to rescue him before it's too late.

A family is killed, and the team searches for a drug dealer with a likely connection; Voight asks Vice Sgt. Sean McGrady for help.

Halstead goes undercover to stop an ex-military kidnapping crew from killing an innocent child.

When one of Voight's friends is found passed out in his hotel room with a dead Ukrainian girl, Intelligence discovers the murder is connected to a sting and Burgess' boyfriend.

The death of Judge Tommy Wells' daughter puts Intelligence on the track of a pill mill spreading into the suburbs of Chicago and the doctor enabling it; Voight discovers who's been leaking information from the 21st.

Halstead puts his career on the line to help solve a case with ties to his new girlfriend; Voight finally discovers the mole in his unit.

Lucie Blackman, a 21-year-old British woman, vanishes in Tokyo while working as a hostess during a break from university.

Luka Gordic joins friends for a Spring Break weekend party in British Columbia.

A family is killed, and the team searches for a drug dealer with a likely connection; Voight asks Vice Sgt. Sean McGrady for help.

Halstead goes undercover to stop an ex-military kidnapping crew from killing an innocent child.

When one of Voight's friends is found passed out in his hotel room with a dead Ukrainian girl, Intelligence discovers the murder is connected to a sting and Burgess' boyfriend.

The death of Judge Tommy Wells' daughter puts Intelligence on the track of a pill mill spreading into the suburbs of Chicago and the doctor enabling it; Voight discovers who's been leaking information from the 21st.

Halstead puts his career on the line to help solve a case with ties to his new girlfriend; Voight finally discovers the mole in his unit.

Burgess works with her first criminal informant to track down a ruthless pimp and break up his prostitution ring.

When Atwater disappears at the house of a convicted felon, the intelligence unit rallies to rescue him before it's too late.

A private school owner is kidnapped.

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

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

An apartment fire with connections to a rape and attempted murder leads to a joint investigation with the CPD and Sgt. Benson of the NYPD's Special Victims Unit; Dawson risks her life during a call.

Sgt. Voight encourages Lt. Casey to go undercover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.

Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.

During an undercover operation, Lt. Casey lands in very dangerous territory; Dawson's suspicions are confirmed; a new candidate (Steven R. McQueen) makes an unusual first impression; a protest hinders firefighters who are trying to battle a blaze.

Members of the firehouse are frustrated with their inability to help Chief Boden, whose job is on the line pending an internal investigation in the aftermath of a complicated call to a fire; Lt. Severide struggles to accept his smaller role and adjusts to the presence of Capt. Patterson, his new commanding officer; Dawson shakes things up on the work front and Casey attempts to find a crucial piece of evidence in his ongoing investigation against Nesbitt.

When new evidence appears in the internal affairs investigation that will clear Chief Boden, a twist puts him right back in the thick of it; Brett and Chili try to save a stabbing victim from bleeding to death.

Members of the firehouse band together to help one of their own; Herrmann looks for a way to reopen Molly's; Severide struggles to deal with one of his toughest days as he looks into the arson investigation.

An apartment fire with connections to a rape and attempted murder leads to a joint investigation with the CPD and Sgt. Benson of the NYPD's Special Victims Unit; Dawson risks her life during a call.

Sgt. Voight encourages Lt. Casey to go undercover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.

Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.

During an undercover operation, Lt. Casey lands in very dangerous territory; Dawson's suspicions are confirmed; a new candidate (Steven R. McQueen) makes an unusual first impression; a protest hinders firefighters who are trying to battle a blaze.

Members of the firehouse are frustrated with their inability to help Chief Boden, whose job is on the line pending an internal investigation in the aftermath of a complicated call to a fire; Lt. Severide struggles to accept his smaller role and adjusts to the presence of Capt. Patterson, his new commanding officer; Dawson shakes things up on the work front and Casey attempts to find a crucial piece of evidence in his ongoing investigation against Nesbitt.

When new evidence appears in the internal affairs investigation that will clear Chief Boden, a twist puts him right back in the thick of it; Brett and Chili try to save a stabbing victim from bleeding to death.

Members of the firehouse band together to help one of their own; Herrmann looks for a way to reopen Molly's; Severide struggles to deal with one of his toughest days as he looks into the arson investigation.

An apartment fire with connections to a rape and attempted murder leads to a joint investigation with the CPD and Sgt. Benson of the NYPD's Special Victims Unit; Dawson risks her life during a call.

Sgt. Voight encourages Lt. Casey to go undercover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.

Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.

During an undercover operation, Lt. Casey lands in very dangerous territory; Dawson's suspicions are confirmed; a new candidate (Steven R. McQueen) makes an unusual first impression; a protest hinders firefighters who are trying to battle a blaze.

Members of the firehouse are frustrated with their inability to help Chief Boden, whose job is on the line pending an internal investigation in the aftermath of a complicated call to a fire; Lt. Severide struggles to accept his smaller role and adjusts to the presence of Capt. Patterson, his new commanding officer; Dawson shakes things up on the work front and Casey attempts to find a crucial piece of evidence in his ongoing investigation against Nesbitt.

A private school owner is kidnapped.

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

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.

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

The team's actions, particularly Sgt. Parker's, are called into question after a shooting at a museum gala.

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.

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

The team's actions, particularly Sgt. Parker's, are called into question after a shooting at a museum gala.

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.

The team's actions, particularly Sgt. Parker's, are called into question after a shooting at a museum gala.

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

Boden steps up to host a neighborhood wedding that was ruined by a fire; Chief Riddle's political aspirations cause friction at the firehouse; Severide fights his way back to his old position.

Chief Boden's new neighbor asks him for a favor; tension escalates between Severide and Captain Patterson; Cruz receives a surprise visitor; Mouch and Herrmann are excited to receive concert tickets to see Rush.

Boden thinks he's being set up by his neighbor; Severide's father pays him an unexpected visit; romance is in the air at the Chicago Fire Department gala.

Patterson questions Boden's ability to lead the firehouse as the trial approaches; Brett and Chili find an unconscious man in a garden; Otis tries to fill his social calendar.

Members of Firehouse 51 are unhappy when Patterson fills in for Boden while he tries to clear his name; Severide may have found Serena; Chili and Jimmy attract more attention than they expected.

A member of Firehouse 51 is treated for life-threatening injuries; Cruz searches for Freddie; Mouch has a surprise for Trudy; Chili's behavior worries Brett and Jimmy.

A funeral brings together different sides of Dante's family, Irish rebels and Jamaicans, and reunites him with his cousin Bardon, who can sing.

Boden steps up to host a neighborhood wedding that was ruined by a fire; Chief Riddle's political aspirations cause friction at the firehouse; Severide fights his way back to his old position.

Chief Boden's new neighbor asks him for a favor; tension escalates between Severide and Captain Patterson; Cruz receives a surprise visitor; Mouch and Herrmann are excited to receive concert tickets to see Rush.

Boden thinks he's being set up by his neighbor; Severide's father pays him an unexpected visit; romance is in the air at the Chicago Fire Department gala.

A funeral brings together different sides of Dante's family, Irish rebels and Jamaicans, and reunites him with his cousin Bardon, who can sing.

Members of Firehouse 51 are unhappy when Patterson fills in for Boden while he tries to clear his name; Severide may have found Serena; Chili and Jimmy attract more attention than they expected.

A member of Firehouse 51 is treated for life-threatening injuries; Cruz searches for Freddie; Mouch has a surprise for Trudy; Chili's behavior worries Brett and Jimmy.

A funeral brings together different sides of Dante's family, Irish rebels and Jamaicans, and reunites him with his cousin Bardon, who can sing.

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.

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

Spike discovers his former mentor may be implicated in a tangled case involving corruption, drug dealers and an attempted gang execution.

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.

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

Spike discovers his former mentor may be implicated in a tangled case involving corruption, drug dealers and an attempted gang execution.

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.

Spike discovers his former mentor may be implicated in a tangled case involving corruption, drug dealers and an attempted gang execution.

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

Doctors Rhodes and Downey are at odds over a patient's emergency heart surgery; Dr. Choi and a paramedic respond to a call from an injured hoarder; a woman is bitten by her own dog.

April and Dr. Halstead can't agree on how to treat a homeless alcoholic with a broken leg; Dr. Manning realizes her wedding ring has gone missing; two elderly women with the same symptoms are surprisingly linked.

Dr. Rhodes cares for Dr. Downey while Goodwin deals with personal issues; April gets hit while tending to a disorderly patient; Dr. Manning's past starts to catch up with her.

Dr. Rhodes begins his cardiothoracic surgery fellowship but gets off on the wrong foot with his new boss; Dr. Choi begins his life as chief resident; Sarah is caught off-guard by Dr. Charles; April tries to deal with her recently discovered illness.

Dr. Manning and Dr. Rhodes suspect that two separate cases involving sick babies may be connected; a homeless patient's upbeat disposition enlightens Dr. Halstead and Dr. Charles; Dr. Choi and a Navy corpsman deal with the toll of gang violence.

An Indonesian man who doesn't speak English arrives at the hospital with a mysterious illness; Dr. Halstead attends Maggie's family reunion; Dr. Rhodes accepts a complicated heart surgery without consulting Dr. Latham.

As Jim plots to take down a corrupt cop, Nina uncovers buried FBI secrets; a shadowy figure in D.C. watches her every move.

Doctors Rhodes and Downey are at odds over a patient's emergency heart surgery; Dr. Choi and a paramedic respond to a call from an injured hoarder; a woman is bitten by her own dog.

April and Dr. Halstead can't agree on how to treat a homeless alcoholic with a broken leg; Dr. Manning realizes her wedding ring has gone missing; two elderly women with the same symptoms are surprisingly linked.

Dr. Rhodes cares for Dr. Downey while Goodwin deals with personal issues; April gets hit while tending to a disorderly patient; Dr. Manning's past starts to catch up with her.

Dr. Rhodes begins his cardiothoracic surgery fellowship but gets off on the wrong foot with his new boss; Dr. Choi begins his life as chief resident; Sarah is caught off-guard by Dr. Charles; April tries to deal with her recently discovered illness.

Dr. Manning and Dr. Rhodes suspect that two separate cases involving sick babies may be connected; a homeless patient's upbeat disposition enlightens Dr. Halstead and Dr. Charles; Dr. Choi and a Navy corpsman deal with the toll of gang violence.

An Indonesian man who doesn't speak English arrives at the hospital with a mysterious illness; Dr. Halstead attends Maggie's family reunion; Dr. Rhodes accepts a complicated heart surgery without consulting Dr. Latham.

As Jim plots to take down a corrupt cop, Nina uncovers buried FBI secrets; a shadowy figure in D.C. watches her every move.

Daily gossip and celebrity news from home and abroad; roving reporters and Hollywood correspondents provide must-have details on scoops.

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

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

When Jules finds herself in the middle of a hostage situation at a restaurant, the SRUs are brought in to take care of the gunman, who believes the establishment's owner is a terrorist.

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

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

When Jules finds herself in the middle of a hostage situation at a restaurant, the SRUs are brought in to take care of the gunman, who believes the establishment's owner is a terrorist.

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

When Jules finds herself in the middle of a hostage situation at a restaurant, the SRUs are brought in to take care of the gunman, who believes the establishment's owner is a terrorist.

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

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.

When family members fall ill from deadly poison found in their soda, investigators turn their attention to the quiet couple who live next door.

A search mission for three women missing in Yosemite Park turns to a murder investigation when two are discovered in the trunk of their burned out car.

A botched plan leads to a crime boss escaping with his girlfriend, who works for the team as an informant.

When family members fall ill from deadly poison found in their soda, investigators turn their attention to the quiet couple who live next door.

A search mission for three women missing in Yosemite Park turns to a murder investigation when two are discovered in the trunk of their burned out car.

A botched plan leads to a crime boss escaping with his girlfriend, who works for the team as an informant.

When family members fall ill from deadly poison found in their soda, investigators turn their attention to the quiet couple who live next door.

A botched plan leads to a crime boss escaping with his girlfriend, who works for the team as an informant.

A search mission for three women missing in Yosemite Park turns to a murder investigation when two are discovered in the trunk of their burned out car.

A car crash at the Chicago Marathon leaves victims in critical condition; April and her medical resident brother must perform an intense operation in the field; an 8-year-old girl experiences sudden hearing loss; Dr. Choi treats a malnourished woman.

A young cancer patient struggles to tell her parents about her condition; Dr. Reese turns to Dr. Charles and Detective Lindsay for help with a troubled young man; a teen science geek and her friends impress Dr. Choi and Natalie.

Goodwin reunites with her childhood sweetheart; Dr. Halstead gets lured into a concierge doctor app idea; Dr. Rhodes treats a woman with a heart infection against the advice of Dr. Charles; a former patient of Reese's reaches out for help.

Halstead and Manning deal with two feuding brothers, one of which is in dire need of a kidney; a patient of Dr. Reese's comes to a crossroad; a 16-year-old with a genetic condition needs surgery, but the overprotective mother gets in the way.

Dr. Charles is tasked with evaluating a patient as a possible heart recipient; Jeff makes a confession to Dr. Manning; two MMA fighters arrive at Chicago Med in bad shape; Dr. Stohl returns from his sabbatical.

A heart transplant patient gets into a car accident, revealing issues that could complicate her surgery; the police officer who arrested Maggie is brought to Chicago Med with a serious injury.

A 19-year-old Colorado media major disappears after a night on the town.

Advances in DNA science solve the 40-year cold case of a student's murder.

A young cancer patient struggles to tell her parents about her condition; Dr. Reese turns to Dr. Charles and Detective Lindsay for help with a troubled young man; a teen science geek and her friends impress Dr. Choi and Natalie.

Goodwin reunites with her childhood sweetheart; Dr. Halstead gets lured into a concierge doctor app idea; Dr. Rhodes treats a woman with a heart infection against the advice of Dr. Charles; a former patient of Reese's reaches out for help.

Halstead and Manning deal with two feuding brothers, one of which is in dire need of a kidney; a patient of Dr. Reese's comes to a crossroad; a 16-year-old with a genetic condition needs surgery, but the overprotective mother gets in the way.

Dr. Charles is tasked with evaluating a patient as a possible heart recipient; Jeff makes a confession to Dr. Manning; two MMA fighters arrive at Chicago Med in bad shape; Dr. Stohl returns from his sabbatical.

A heart transplant patient gets into a car accident, revealing issues that could complicate her surgery; the police officer who arrested Maggie is brought to Chicago Med with a serious injury.

A 19-year-old Colorado media major disappears after a night on the town.

Advances in DNA science solve the 40-year cold case of a student's murder.

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.

Police search for the killer of an elderly upscale Toronto couple.

Team One members must undergo intense psychological testing; Ed, on his way to the hospital for the birth of his child, gets shot.

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.

Police search for the killer of an elderly upscale Toronto couple.

Team One members must undergo intense psychological testing; Ed, on his way to the hospital for the birth of his child, gets shot.

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.

Team One members must undergo intense psychological testing; Ed, on his way to the hospital for the birth of his child, gets shot.

Police search for the killer of an elderly upscale Toronto couple.

Officers Nolan, Chen and West are squeezed harder than ever before as their training officers evaluate whether they are truly ready for the job; one of the rookie classmates is involved in a shooting.

Nolan's discovery goes much deeper than he expected and could put his life and career in jeopardy.

Nearing the end of his training, Nolan faces his biggest challenge as a police officer yet when he must come to terms with the choices he has made in pursuit of the truth.

Officer John Nolan and Officer Nyla Harper are assigned to a community policing center in an attempt to rebuild their station's reputation in the community.

Officer John Nolan's mom makes an unannounced visit, which complicates his life; Sgt. Grey considers retiring.

Officer Jackson West's relationship with his new training officer, Stanton, escalates, and he begins to work with Sgt. Grey to find a solution.

Officer Nolan is taken hostage by a man with nothing to lose; Officer Jackson and his training officer, Officer Doug Stanton, reach a tipping point in their relationship that could end Jackson's career.

Officers Nolan, Chen and West are squeezed harder than ever before as their training officers evaluate whether they are truly ready for the job; one of the rookie classmates is involved in a shooting.

Nolan's discovery goes much deeper than he expected and could put his life and career in jeopardy.

Nearing the end of his training, Nolan faces his biggest challenge as a police officer yet when he must come to terms with the choices he has made in pursuit of the truth.

Officer John Nolan and Officer Nyla Harper are assigned to a community policing center in an attempt to rebuild their station's reputation in the community.

Officer John Nolan's mom makes an unannounced visit, which complicates his life; Sgt. Grey considers retiring.

Officer Jackson West's relationship with his new training officer, Stanton, escalates, and he begins to work with Sgt. Grey to find a solution.

Officer Nolan is taken hostage by a man with nothing to lose; Officer Jackson and his training officer, Officer Doug Stanton, reach a tipping point in their relationship that could end Jackson's career.

Officers Nolan, Chen and West are squeezed harder than ever before as their training officers evaluate whether they are truly ready for the job; one of the rookie classmates is involved in a shooting.

The largest police investigation of the decade lasted 23 days to catch a sniper who terrorized Washington, D. C. residents.

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

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

The team works with a visiting detective to put an end to a gang's brutal tactics; Antonio learns that the detective has a hidden motive for being in Chicago; Voight learns that the body of his son's killer has been found.

A basketball star is found murdered after an anti-police rally; a politically charged environment must be navigated while tracking down the killer; complicating matters further, Woods' daughter Brianna is tangled up in the case.

Intelligence tracks down a vigilante who is killing rapists; Burgess begins to question if the men who attacked her sister truly paid for their actions.

A string of bombings is targeting members of the media; the team enlists firehouse 51 to help examine the devices and prevent the next attack.

When a prominent alderman who is known for his urban revitalization efforts is killed, Intelligence looks into the corruption haunting his neighborhood; Olinsky feels pressure after receiving an ultimatum from Woods.

Upton brings back an old undercover identity to help take down a meth ring spearheaded by a former contact; with pressure from Woods mounting, Voight calls in a favor for Olinsky.

A string of robberies leads back to an unlikely individual; Voight confronts a key witness in the Bingham investigation.

The team works with a visiting detective to put an end to a gang's brutal tactics; Antonio learns that the detective has a hidden motive for being in Chicago; Voight learns that the body of his son's killer has been found.

A basketball star is found murdered after an anti-police rally; a politically charged environment must be navigated while tracking down the killer; complicating matters further, Woods' daughter Brianna is tangled up in the case.

Intelligence tracks down a vigilante who is killing rapists; Burgess begins to question if the men who attacked her sister truly paid for their actions.

A string of bombings is targeting members of the media; the team enlists firehouse 51 to help examine the devices and prevent the next attack.

When a prominent alderman who is known for his urban revitalization efforts is killed, Intelligence looks into the corruption haunting his neighborhood; Olinsky feels pressure after receiving an ultimatum from Woods.

A 19-year-old Colorado media major disappears after a night on the town.

Advances in DNA science solve the 40-year cold case of a student's murder.

The team works with a visiting detective to put an end to a gang's brutal tactics; Antonio learns that the detective has a hidden motive for being in Chicago; Voight learns that the body of his son's killer has been found.

A basketball star is found murdered after an anti-police rally; a politically charged environment must be navigated while tracking down the killer; complicating matters further, Woods' daughter Brianna is tangled up in the case.

Intelligence tracks down a vigilante who is killing rapists; Burgess begins to question if the men who attacked her sister truly paid for their actions.

A string of bombings is targeting members of the media; the team enlists firehouse 51 to help examine the devices and prevent the next attack.

When a prominent alderman who is known for his urban revitalization efforts is killed, Intelligence looks into the corruption haunting his neighborhood; Olinsky feels pressure after receiving an ultimatum from Woods.

Upton brings back an old undercover identity to help take down a meth ring spearheaded by a former contact; with pressure from Woods mounting, Voight calls in a favor for Olinsky.

A string of robberies leads back to an unlikely individual; Voight confronts a key witness in the Bingham investigation.

A sniper targeting abortion doctors turns murderous and a DNA "needle in a haystack" identifies the gunman.

A small town encounters satanic rituals and a savage killer.

Top criminal investigators, forensic scientists and behavioral analysts track three serial killers.

Herrmann is tormented by a difficult decision; Casey is thrown into the spotlight at a fundraiser; Dawson and Brett are faced with the repercussions of their actions; Severide helps with a case regarding homemade explosives; Otis is surprised.

News of a mass shooting brings the members of Firehouse 51 into harrowing territory; Casey investigates the missing money from the fundraiser; Jimmy participates in a boxing match; Chili's erratic behavior continues to be a major issue for Brett.

Chili does not respond well when Severide tries to talk to her about her erratic behavior; members of the firehouse think Casey should run for the position of alderman; Jimmy and Antonio face off in a boxing match.

Firehouse 51 responds to an unusual call from another firehouse; the addition of a new firefighter (Miranda Rae Mayo) has repercussions; Casey realizes that certain voters have personal agendas for wanting him elected.

A propaganda attack causes Casey to reconsider his run for alderman; when a man is trapped inside a burning car, it seems the fire may have been set intentionally; Trudy's nerdy brother plans Mouch's bachelor party; a kidnapping investigation.

Severide is led to reexamine a case from the past while he investigates the discovery of a baby's body in a chimney; with election day nearing, Casey prepares for another confrontation with Alderman.

A call takes a bad turn when Brett witnesses a murder while aiding a victim who has a leg wound; a restaurant fire has people trapped inside a vault; Mouch gets cold feet about his upcoming wedding.

Herrmann is tormented by a difficult decision; Casey is thrown into the spotlight at a fundraiser; Dawson and Brett are faced with the repercussions of their actions; Severide helps with a case regarding homemade explosives; Otis is surprised.

News of a mass shooting brings the members of Firehouse 51 into harrowing territory; Casey investigates the missing money from the fundraiser; Jimmy participates in a boxing match; Chili's erratic behavior continues to be a major issue for Brett.

Chili does not respond well when Severide tries to talk to her about her erratic behavior; members of the firehouse think Casey should run for the position of alderman; Jimmy and Antonio face off in a boxing match.

Firehouse 51 responds to an unusual call from another firehouse; the addition of a new firefighter (Miranda Rae Mayo) has repercussions; Casey realizes that certain voters have personal agendas for wanting him elected.

A propaganda attack causes Casey to reconsider his run for alderman; when a man is trapped inside a burning car, it seems the fire may have been set intentionally; Trudy's nerdy brother plans Mouch's bachelor party; a kidnapping investigation.

Severide is led to reexamine a case from the past while he investigates the discovery of a baby's body in a chimney; with election day nearing, Casey prepares for another confrontation with Alderman.

A call takes a bad turn when Brett witnesses a murder while aiding a victim who has a leg wound; a restaurant fire has people trapped inside a vault; Mouch gets cold feet about his upcoming wedding.

Herrmann is tormented by a difficult decision; Casey is thrown into the spotlight at a fundraiser; Dawson and Brett are faced with the repercussions of their actions; Severide helps with a case regarding homemade explosives; Otis is surprised.

News of a mass shooting brings the members of Firehouse 51 into harrowing territory; Casey investigates the missing money from the fundraiser; Jimmy participates in a boxing match; Chili's erratic behavior continues to be a major issue for Brett.

Chili does not respond well when Severide tries to talk to her about her erratic behavior; members of the firehouse think Casey should run for the position of alderman; Jimmy and Antonio face off in a boxing match.

Firehouse 51 responds to an unusual call from another firehouse; the addition of a new firefighter (Miranda Rae Mayo) has repercussions; Casey realizes that certain voters have personal agendas for wanting him elected.

A propaganda attack causes Casey to reconsider his run for alderman; when a man is trapped inside a burning car, it seems the fire may have been set intentionally; Trudy's nerdy brother plans Mouch's bachelor party; a kidnapping investigation.

A sniper targeting abortion doctors turns murderous and a DNA "needle in a haystack" identifies the gunman.

A small town encounters satanic rituals and a savage killer.

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.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

There is a connection discovered between Ed's shooter and a drug kingpin; Ed is rushed to surgery, as his wife experiences problems delivering their baby.

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.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

There is a connection discovered between Ed's shooter and a drug kingpin; Ed is rushed to surgery, as his wife experiences problems delivering their baby.

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.

There is a connection discovered between Ed's shooter and a drug kingpin; Ed is rushed to surgery, as his wife experiences problems delivering their baby.

Knowledge of insects by a forensic entomologist leads police to the killer of a wife and mother of two.

Casey attempts to use political influence to remedy a gang retribution incident; Severide helps Holloway in a dangerous undercover investigation.

Detective Holloway testifies in court as part of an undercover operation, leaving Severide to watch her young son; a fire at an art gallery with a victim trapped inside leads Cruz to make a rash decision.

Dawson risks her life to save a boy in an apartment fire; Severide pushes for an upgrade on the house's fire masks; Cruz and Brett have an idea to get Otis to take a blood test.

A building collapses and leaves dozens of people trapped and injured; Chief Boden faces a life-or-death decision in the rescue plan; Dawson continues her quest to foster Louie; tensions flare between Casey and Antonio.

Lt. Boden and Jimmy are at odds in the aftermath of recent events; Kidd must deal with her volatile ex; Dawson puts on her best face in the pursuit of fostering Louie; Casey leaves town to attend a three-day summit.