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Clues to Serena's possible whereabouts are uncovered, while Captain Patterson has news for everyone.
All Episodes - S04
EPS01
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.
EPS02
Internal Affairs investigates Firehouse 51 following a complicated call to a fire.
EPS03
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.
EPS04
A member of Firehouse 51 requires the support of the whole team to recover from a near disaster.
EPS05
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 firefighters.
EPS06
Severide and Patterson's differences reach a boiling point, while a visitor from Cruz's past asks for a favor.
EPS07
Boden finds himself in the middle of a fiasco concerning a female neighbor he believes is setting him up.
EPS08
Patterson confronts Boden about his ability to lead the firehouse.
EPS09
Clues to Serena's possible whereabouts are uncovered, while Captain Patterson has news for everyone.
EPS10
While a member of Firehouse 51 falls victim to a near-fatal stabbing, the other firefighters rescue a woman who attempted to commit suicide.
EPS11
The city of Chicago braces for a tornado.
EPS12
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 left to figure out what to do. Following the aftermath of the recent tornado, Lt. Casey learns the makeshift shelter housing victims is on the brink of shutting down. At the request of Alderman Colin Becks Casey attends a fundraiser and is thrown into the spotlight, only to quickly discover that his good intentions might not have the impact he was hoping for. Dawson and Brett feel the repercussions after telling Boden about Chilis recent erratic behavior. Meanwhile, Severide helps Agent Alex Ward solve a homemade explosives case and Otis receives a welcome surprise.
EPS13
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.
EPS14
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 of the firehouse rally around Lt. Casey who they believe is a perfect candidate to run for the position as Alderman and Jimmy faces off against Antonio in the first annual Battle of the Badges boxing match.
EPS15
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 is an accident while trying to do an exercise. After helping him, Cruz overhears the fireman who was with the man who was injured telling what happened. Cruz then tells Severide the story he told doesn't jive with how the equipment was set up. Severide says he knows the man and says he's a good man but Cruz won't let it go and a new guy tells them he was at that station and says the two men were butting heads. Severide decides to pursue it which causes the brass to come down on them. Boden informs Borrelli that he is being bumped off the team for someone with seniority. Written by rcs0411@yahoo.com
EPS16
A citywide propaganda attack against Casey's run for alderman makes him reconsider his candidacy.
EPS17
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 words, he's going to be double dipping. Which leads to the Chief coming to the station and questioning Casey's intentions which leads Casey to promise he's done campaigning but when his opponent schedules a debate, Casey finds himself in a precarious position. And when the squad goes a reported gas leak, they find the remains of a child in the chimney. They break it to get to the remains. Later a detective shows up to tell Severide because of what he did, the evidence was compromised. She then shows him crime scene photos and Kelly thinks he knows who the child is--a child who went missing a few years ago. Problem is that the child went missing at a location far from the house. The detective wants to be sure but Kelly goes to see the girl's mother to tell her that he might have found her daughter. And the detective ... Written by rcs0411@yahoo.com
EPS18
Sylvie is threatened when she witnesses a murder.
EPS19
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 Holloway brings her son to the station and asks Kelly to keep an eye on him. He comes back later without his mom. Kidd tells Hermann she knows more about managing a bar than he does. So they have a wager to see who's better so Dawson prepares a series of contests for them. Otis sees something is wrong with him so he goes to Chicago Med to check it out but is unwilling to have the tests. A woman Brett and Borelli helped calls them again but only to thank them and she shows up at the station with a gift for them. Written by rcs0411@yahoo.com
EPS20
Severide watches over Detective Holloway's son while she testifies in court as part of an undercover operation, but he's left to deal with the situation due to an unexpected turn of events.
EPS21
When the team responds to a fire at a house, Dawson finds a boy and he's hesitant to go with her but he eventually goes with her. And he refuses to let her go so she goes with him to the hospital and she finds out that he's a foster child and his guardian is seriously injured so he ends up in a state facility and Dawson is worried about him. Severride was nearly trapped in the house because he thought someone was in the house but there wasn't so he tells Boden if they have a new type of mask they can tell if there is someone in a fire. But Boden says the Chief says it's not in the budget, so Casey tries to find a way to get it. Stella and Hermann have a dispute about the ice they use at Molly's. And when Cruz learns about Otis avoiding getting tested, he decides to turn to the one person Otis can't say no to. Written by rcs0411@yahoo.com
EPS22
Dawson is determined to be approved a s a foster parent so she can take in Louie, the boy she saved. And Casey is not exactly supportive. Borrelli's brother, also a fireman asks him to ask Casey to help with a business venture. Kelly advises not to. Otis, who is still on leave, drops by the station and when he sees the guy filling in for him, he's worried that they will want him to stay on. Written by rcs0411@yahoo.com
EPS23
Borelli is still dealing with his brother's death and wondering if Boden is at fault. Dawson tries to find a new place so that she can be made Louie's new foster mom. Stella learns her ex has fallen off the wagon and tries to help him. Casey goes to an Alderman conference and Susan goes with him. Written by rcs0411@yahoo.com