The squad finds a boy beaten and tied to the tracks. Casey learns that the boy was targeted because of his brother. He tries to help the boy but is unable to. Detecxtive ...

Sylvie is threatened when she witnesses a murder. ...

With election approaching Casey's opponent tries to fling a little mud on him by saying he intends to continue working for the fire department even if he wins, in other w ...

A citywide propaganda attack against Casey's run for alderman makes him reconsider his candidacy. ...

Casey begins his campaign and is approached by someone who represents people who want to support him. The team responds to a call at another firehouse wherein one of them ...

Lt. Severide (Taylor Kinney) confronts Chili about his suspicions regarding her erratic behavior, but she does not take too kindly to his intentions. Meanwhile, members o ...

Mysterious threats begin to emerge throughout Chicago and the situation gets worse when news of a mass shooting brings Firehouse 51 into a dangerous scene. ...

Herrmann goes to court to testify against Freddie but when the perpetrators father reaches out to beg forgiveness for his sons malicious attack, a tormented Herrmann is l ...

The city of Chicago braces for a tornado. ...

While a member of Firehouse 51 falls victim to a near-fatal stabbing, the other firefighters rescue a woman who attempted to commit suicide. ...

Clues to Serena's possible whereabouts are uncovered, while Captain Patterson has news for everyone. ...

Patterson confronts Boden about his ability to lead the firehouse. ...

Boden finds himself in the middle of a fiasco concerning a female neighbor he believes is setting him up. ...

Severide and Patterson's differences reach a boiling point, while a visitor from Cruz's past asks for a favor. ...

Boden offers to host a wedding at the firehouse after a fire ruins the ceremony, but Chief Riddle is against it and his political aspirations cause friction among the fir ...

A member of Firehouse 51 requires the support of the whole team to recover from a near disaster. ...

Boden's job is on the line as the crew of Firehouse 51 continues to search for evidence that could clear him of any wrongdoing. ...

Internal Affairs investigates Firehouse 51 following a complicated call to a fire. ...

Casey finds himself in dangerous territory at the center of an undercover operation to bring down a trafficking ring out of Nesbitt's strip club. ...

Casey puts his life on the line and digs deeper into the shady dealings of Jack Nesbitt. With members of truck and squad at odds over Rice actions in the field, Chief Bod ...

At Sgt. Voight's urging, a determined Lt. Casey agrees to go undercover in an effort to provide proof of Jack Nesbitt shady dealings. Meanwhile, Otis and Severide continu ...

An apartment fire connected to a case of rape and attempted murder resembles an unsolved case in New York, so Sgt. Benson of Special Victims Unit comes to Chicago to help ...

Mills is back on squad. His sister and mother show up and tell him that they've decided to move to North Carolina and run the restaurant his grandfather left them. They w ...

A man blows himself up, claiming to have something worse than Ebola. Meanwhile members of Chicago Med and Chicago Fire try to handle the situation as best they can. Kelly ...

Herrmann saves an infant in a structural fire, then goes on a quest to solve dubious circumstances about the event. Meanwhile, Severide retraces important friendships fro ...

Severide's old friend arrives, hoping for a second chance with the Chicago Fire Department. Meanwhile, Mills tries to regain his active squad status, Mouch confronts his ...

In an effort to further cover himself from any wrongdoing, Pridgen will enlist the help of Lt. Welch, who is faced with the choice of whether to fit in with the firehouse ...

Interim Chief Pat Pridgen (guest star Matthew Del Negro) is brought over to temporarily fill in for Boden (Eamonn Walker), who is left to tend to his personal affairs. Wh ...

An ice storm hits, forcing a citywide lockdown. Mills and Brett are left stranded in the elements while searching for a teen, and the firehouse members babysit a newborn. ...

More clues emerge about the fire that killed Shay, leading Severide to a former nemesis; Shay's sister visits; Cruz is faced with a surprise; Boden tries to help his fath ...

Severide and Dawson discover startling evidence found at a storage unit fire that appears connected to the fire that took Shay's life. Meanwhile, the firehouse bands toge ...

The firehouse receives unsettling news when two of their own come up missing following a routine call, prompting members of Chicago P.D. to lead the search. Meanwhile, Ca ...