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Season 4 of Chicago Fire premiered on October 13, 2015 with the episode Let It Burn. This season consists of 23 episodes. Season 4 concluded on May 17, 2016 with Superhero.

Summary[]

At the start of the season, Severide is facing demotion after an incident during a fire. Casey, on the other hand, finds himself in a deadly situation as he continued helping the Chicago PD in taking down a former firefighter-turned-club owner and human trafficker. Dawson joins the OFI team and makes a discovery linking a corrupt real estate mogul to a series of fires. The 51 undertake a new candidate. Molly's is being threatened by a couple of Portland liberals.

Cast[]

Main Cast[]

Crossover Cast[]

Recurring Cast[]

Episode List[]

No. Episode Summary Air date
4x01
070
Let It Burn
4x01
Severide faces a demotion and the squad faces an angry mob. Truck 81 gets a new candidate. October 13, 2015
4x02
071
A Taste of Panama City
4x02
An Internal Affairs Bureau investigation threatens to tear the house apart. October 20, 2015
4x03
072
I Walk Away
4x03
Dawson discovers a cover-up; Boden risks everything to clear Firehouse 51. October 27, 2015
4x04
073
Your Day Is Coming
4x04
Dawson clings to life after devastating pregnancy complications; Severide suspects an insider stole the missing arson files; the fight to save Molly's begins. November 3, 2015
4x05
074
Regarding This Wedding
4x05
51 rescues a wedding party from a fiery dress rehearsal. November 10, 2015
4x06
075
2112
4x06
Boden is accused of a horrific crime; a gang member seeks Cruz's help. November 17, 2015
4x07
076
Sharp Elbows
4x07
Boden attempts to get to the bottom of the conspiracy against him. November 24, 2015
4x08
077
When Tortoises Fly
4x08
The motive behind the conspiracy against Boden is revealed. December 1, 2015
4x09
078
Short and Fat
4x09
Dawson becomes a conspiracy target; an act of violence changes 51 forever. December 8, 2015
4x10
079
The Beating Heart
4x10
Herrmann fights for his life after being stabbed. January 5, 2016
4x11
080
The Path of Destruction
4x11
A tornado wreaks havoc on Chicago and Firehouse 51. January 19, 2016
4x12
081
Not Everyone Makes It
4x12
Herrmann testifies against Freddie; Casey confronts a shady politician. January 26, 2016
4x13
082
The Sky is Falling
4x13
Chicago fears a large-scale threat; Casey tries to help the tornado victims. February 2, 2016
4x14
083
All Hard Parts
4x14
Severide reaches out to Chili; Casey makes a run for political office. The legendary Battle of the Badges takes place. February 9, 2016
4x15
084
Bad for the Soul
4x15
51 welcomes a new firefighter; Borrelli joins Brett as a paramedic. February 16, 2016
4x16
085
Two T's
4x16
Casey's opponent plays dirty politics; Mouch has a bachelor party. February 23, 2016
4x17
086
What Happened to Courtney?
4x17
Severide begins a personal crusade to solve a cold case. March 29, 2016
4x18
087
On the Warpath
4x18
Brett becomes a gunman's target after witnessing a murder. A wedding takes place at Molly's. April 5, 2016
4x19
088
I Will Be Walking
4x19
Casey steps up to help a teenager being bullied by a gang. April 19, 2016
4x20
089
The Last One for Mom
4x20
Firehouse 51 unites to help a young boy in tragic circumstances. April 26, 2016
4x21
090
Kind of a Crazy Idea
4x21
Dawson decides to become a foster parent to a boy she saved in a fire. May 3, 2016
4x22
091
Where the Collapse Started
4x22
Tragedy strikes one of their own. May 10, 2016
4x23
092
Superhero
4x23
Borrelli confronts Boden about his brother's death. May 17, 2016

Notes[]

  • The season picks up right where the season 3 finale left off. There is no time jump.
  • The finale ends with a cliffhanger.
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