One Chicago & The FBIs Wiki
Chicago Fire (Season 4)
Episodes: 23
Network: NBC
Original run: October 13, 2015 - May 17, 2016
Season chronology
Previous season: Season 3
Next season: Season 5
No Heat They Can't Handle.

–Chicago Fire Season 4 tagline

Chicago Fire season 4 premiered on October 13, 2015 and concluded on May 17, 2016 on NBC.

For the firefighters, Rescue Squad and paramedics of Chicago Firehouse 51, no occupation is more stressful or dangerous, yet so rewarding and exhilarating. These courageous men and women are among the elite who forge headfirst into danger when everyone else is running the other way and whose actions make the difference between life and death.

The pressure to perform on such a high level has a way of taking a personal toll, sometimes putting team members from the Truck and the specially trained Rescue Squad at odds with each other. Despite any differences, this is an extended family, and when it's "go time," everyone inside Firehouse 51 knows no other way than to lay it all on the line for each other. Lt. Matthew Casey (Jesse Spencer) leads the Truck company, and brash Lt. Kelly Severide (Taylor Kinney) runs the Rescue Squad.

The firehouse also includes Battalion Chief Wallace Boden (Eamonn Walker), a fireman's fireman who is tasked with keeping everything in line and running smoothly between Truck and Squad. Paramedic turned tough-as-nails firefighter Gabriela Dawson (Monica Raymund) returns alongside paramedic Sylvie Brett (Kara Killmer) and seasoned veteran Christopher Herrmann (David Eigenberg). Dora Madison also joins the cast as spunky, spirited paramedic Jessica "Chili" Chilton.

Also returning for the fourth season are Randy "Mouch" McHolland (Christian Stolte), Joe Cruz (Joe Miñoso) and Brian "Otis" Zvonecek (Yuri Sardarov). Jimmy Borrelli (Steven R. McQueen) is the newest addition to Firehouse 51.


Main Cast and Characters

Crossover Guest Stars

Recurring Guest Stars

Recurring Co-Stars



Image Episode Summary Airdate
Cf0401.jpg 4.01 (#70)
Let It Burn
Shakeups stir things up at Firehouse 51. October 13, 2015
Cf0402.jpg 4.02 (#71)
A Taste of Panama City
Firehouse 51 comes under scrutiny from internal affairs as turmoil from outside and in threatens the whole crew. October 20, 2015
Cf0403.jpg 4.03 (#72)
I Walk Away
Boden's job is on the line as the search continues to uncover evidence that would clear him and the firehouse of any wrongdoing. October 27, 2015
Cf0404.jpg 4.04 (#73)
Your Day is Coming
Members of Firehouse 51 band together in a time of need. November 3, 2015
Cf0405.jpg 4.05 (#74)
Regarding This Wedding
Friction from the brass above causes problems for everyone at Firehouse 51. November 10, 2015
Cf0406.jpg 4.06 (#75)
Severide and Patterson's differences reach an all-time high and a visitor from Cruz's past comes back. November 17, 2015
Cf0407.jpg 4.07 (#76)
Sharp Elbows
Much to his surprise, Boden finds himself in hot water. November 24, 2015
Cf0408.jpg 4.08 (#77)
When Tortoises Fly
Chief Boden is in over his head and Captain Patterson confronts him about his ability to lead the firehouse. December 1, 2015
Cf0409.jpg 4.09 (#78)
Short and Fat
Clues as to where Serena might be are uncovered that could turn Boden's case around and Captain Patterson has news for everyone. December 8, 2015
Cf0410.jpg 4.10 (#79)
The Beating Heart
The firehouse is shocked to discover that one of their own becomes the surprising victim of a stabbing and an attempted suicide raises some questions. January 5, 2016
Cf0411.jpg 4.11 (#80)
The Path of Destruction
A tornado bears down on Chicago and the whole city braces for the worst. January 19, 2016
Cf0412.jpg 4.12 (#81)
Not Everyone Makes It
A tormented Herrmann is forced to make a difficult decision and Casey does his best to keep a shelter open that's housing recent tornado victims. January 26, 2016
Cf0413.jpg 4.13 (#82)
The Sky is Falling
A wave of threats hits Chicago and Firehouse 51 finds itself in the middle of a dire situation. February 2, 2016
Cf0414.jpg 4.14 (#83)
All Hard Parts
Severide attempts to help Chili with her recent struggles and Borelli steps into the ring to represent Firehouse 51. February 9, 2016
Cf0415.jpg 4.15 (#84)
Bad for the Soul
A suspicious call to a neighboring firehouse leaves some unanswered questions among the ranks of Firehouse 51. February 16, 2016
Cf0416.jpg 4.16 (#85)
Two T's
Casey's run for alderman hits a snag that could derail his grand plans. February 23, 2016
Cf0417.jpg 4.17 (#86)
What Happened to Courtney
Severide and Cruz discover a baby's body that may be linked to an unsolved case. March 29, 2016
Cf0418.jpg 4.18 (#87)
On the Warpath
An unsuspecting Brett is left fearing for her life following a call that takes a bad turn. April 5, 2016
Cf0419.jpg 4.19 (#88)
I Will Be Walking
Casey tries to utilize his political influence to remedy a situation and Otis uncovers something that has him fearing for the worst. April 19, 2016
Cf0420.jpg 4.20 (#89)
The Last One for Mom
Severide is forced into a delicate situation and Casey receives a surprise in the mail. April 26, 2016
Cf0421.jpg 4.21 (#90)
Kind of a Crazy Idea
Dawson puts her life on the line to save a young boy and Otis fears for the worst. May 3, 2016
Cf0422.jpg 4.22 (#91)
Where the Collapse Started
Firehouse 51 responds to a harrowing building collapse that leaves lives on the line. May 10, 2016
Cf0423.jpg 4.23 (#92)
Dawson looks to make a major change and lives are in jeopardy. May 17, 2016

Chicago Fire
Seasons Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8Season 9Season 10Season 11
Current characters Kelly SeverideSylvie BrettChristopher HerrmannJoe CruzRandy "Mouch" McHollandStella KiddBlake GalloDarren RitterViolet MikamiWallace Boden
Former characters Hallie ThomasLeslie ShayPeter MillsJessica "Chili" ChiltonJimmy BorrelliGabriela DawsonBrian "Otis" ZvonecekEmily FosterGianna MackeyMatthew Casey