S13E10: Chaos Theory
The team responds to a crisis at a community center. Severide is forced to investigate one of his own squad members. Kidd helps a teacher going through a post-incident spin-out.
Previous Episode 
Season 1
Pilot
S1E1 / 10 Oct 2012
Mon Amour
S1E2 / 17 Oct 2012
Professional Courtesy
S1E3 / 24 Oct 2012
One Minute
S1E4 / 31 Oct 2012
Hanging On
S1E5 / 07 Nov 2012
Rear View Mirror
S1E6 / 14 Nov 2012
Two Families
S1E7 / 21 Nov 2012
Leaving the Station
S1E8 / 05 Dec 2012
It Ain't Easy
S1E9 / 12 Dec 2012
Merry Christmas, Etc.
S1E10 / 19 Dec 2012
God Has Spoken
S1E11 / 02 Jan 2013
Under the Knife
S1E12 / 09 Jan 2013
Warm and Dead
S1E13 / 30 Jan 2013
A Little Taste
S1E14 / 06 Feb 2013
Nazdarovya!
S1E15 / 13 Feb 2013
Viral
S1E16 / 20 Feb 2013
Better to Lie
S1E17 / 27 Feb 2013
Fireworks
S1E18 / 20 Mar 2013
A Coffin That Small
S1E19 / 27 Mar 2013
Ambition
S1E20 / 03 Apr 2013
Retaliation Hit
S1E21 / 01 May 2013
Leaders Lead
S1E22 / 08 May 2013
Let Her Go
S1E23 / 15 May 2013
A Hell of a Ride
S1E24 / 22 May 2013
Season 2
A Problem House
S2E1 / 24 Sep 2013
Prove It
S2E2 / 01 Oct 2013
Defcon 1
S2E3 / 08 Oct 2013
A Nuisance Call
S2E4 / 15 Oct 2013
A Power Move
S2E5 / 22 Oct 2013
Joyriding
S2E6 / 12 Nov 2013
No Regrets
S2E7 / 19 Nov 2013
Rhymes with Shout
S2E8 / 26 Nov 2013
You Will Hurt Him
S2E9 / 03 Dec 2013
Not Like This
S2E10 / 10 Dec 2013
Shoved in My Face
S2E11 / 07 Jan 2014
Out with a Bang
S2E12 / 14 Jan 2014
Tonight's the Night
S2E13 / 21 Jan 2014
Virgin Skin
S2E14 / 25 Feb 2014
Keep Your Mouth Shut
S2E15 / 04 Mar 2014
A Rocket Blasting Off
S2E16 / 11 Mar 2014
When Things Got Rough
S2E17 / 18 Mar 2014
Until Your Feet Leave the Ground
S2E18 / 08 Apr 2014
A Heavy Weight
S2E19 / 15 Apr 2014
A Dark Day (I)
S2E20 / 29 Apr 2014
One More Shot
S2E21 / 06 May 2014
Real Never Waits
S2E22 / 13 May 2014
Season 3
Always
S3E1 / 23 Sep 2014
Wow Me
S3E2 / 30 Sep 2014
Just Drive the Truck
S3E3 / 07 Oct 2014
Apologies are Dangerous
S3E4 / 14 Oct 2014
The Nuclear Option
S3E5 / 21 Oct 2014
Madmen and Fools
S3E6 / 28 Oct 2014
Nobody Touches Anything (I)
S3E7 / 11 Nov 2014
Chopper
S3E8 / 18 Nov 2014
Arrest in Transit
S3E9 / 25 Nov 2014
Santa Bites
S3E10 / 02 Dec 2014
Let Him Die
S3E11 / 06 Jan 2015
Ambush Predator
S3E12 / 13 Jan 2015
Three Bells (I)
S3E13 / 03 Feb 2015
Call It Paradise
S3E14 / 10 Feb 2015
Headlong Toward Disaster
S3E15 / 17 Feb 2015
Red Rag the Bull
S3E16 / 03 Mar 2015
Forgive You Anything
S3E17 / 10 Mar 2015
Forgiving, Relentless, Unconditional
S3E18 / 17 Mar 2015
I Am the Apocalypse
S3E19 / 07 Apr 2015
You Know Where to Find Me
S3E20 / 21 Apr 2015
We Called Her Jellybean (I)
S3E21 / 28 Apr 2015
Category 5
S3E22 / 05 May 2015
Spartacus
S3E23 / 12 May 2015
Season 4
Let It Burn
S4E1 / 13 Oct 2015
A Taste of Panama City
S4E2 / 20 Oct 2015
I Walk Away
S4E3 / 27 Oct 2015
Your Day Is Coming
S4E4 / 03 Nov 2015
Regarding This Wedding
S4E5 / 10 Nov 2015
2112
S4E6 / 17 Nov 2015
Sharp Elbows
S4E7 / 24 Nov 2015
When Tortoises Fly
S4E8 / 01 Dec 2015
Short and Fat
S4E9 / 08 Dec 2015
The Beating Heart (I)
S4E10 / 05 Jan 2016
The Path of Destruction
S4E11 / 19 Jan 2016
Not Everyone Makes It
S4E12 / 26 Jan 2016
The Sky Is Falling
S4E13 / 02 Feb 2016
All Hard Parts
S4E14 / 09 Feb 2016
Bad for the Soul
S4E15 / 16 Feb 2016
Two Ts
S4E16 / 23 Feb 2016
What Happened to Courtney
S4E17 / 29 Mar 2016
On the Warpath
S4E18 / 05 Apr 2016
I Will Be Walking
S4E19 / 19 Apr 2016
The Last One for Mom
S4E20 / 26 Apr 2016
Kind of a Crazy Idea
S4E21 / 03 May 2016
Where the Collapse Started
S4E22 / 10 May 2016
Superhero
S4E23 / 17 May 2016
Season 5
The Hose or the Animal
S5E1 / 11 Oct 2016
A Real Wake-Up Call
S5E2 / 18 Oct 2016
Scorched Earth
S5E3 / 25 Oct 2016
Nobody Else Is Dying Today
S5E4 / 01 Nov 2016
I Held Her Hand
S5E5 / 15 Nov 2016
That Day
S5E6 / 22 Nov 2016
Lift Each Other
S5E7 / 29 Nov 2016
One Hundred
S5E8 / 06 Dec 2016
Some Make It, Some Don't (I)
S5E9 / 03 Jan 2017
The People We Meet
S5E10 / 17 Jan 2017
Who Lives and Who Dies
S5E11 / 24 Jan 2017
An Agent of the Machine
S5E12 / 07 Feb 2017
Trading in Scuttlebutt
S5E13 / 14 Feb 2017
Purgatory
S5E14 / 21 Feb 2017
Deathtrap (I)
S5E15 / 01 Mar 2017
Telling Her Goodbye
S5E16 / 21 Mar 2017
Babies and Fools
S5E17 / 28 Mar 2017
Take a Knee
S5E18 / 04 Apr 2017
Carry Their Legacy
S5E19 / 25 Apr 2017
Carry Me
S5E20 / 02 May 2017
Sixty Days
S5E21 / 09 May 2017
My Miracle
S5E22 / 16 May 2017
Season 6
It Wasn't Enough
S6E1 / 28 Sep 2017
Ignite on Contact
S6E2 / 05 Oct 2017
An Even Bigger Surprise
S6E3 / 12 Oct 2017
A Breaking Point
S6E4 / 19 Oct 2017
Devil's Bargain
S6E5 / 26 Oct 2017
Down Is Better
S6E6 / 02 Nov 2017
A Man's Legacy
S6E7 / 04 Jan 2018
The Whole Point of Being Roommates
S6E8 / 11 Jan 2018
Foul Is Fair
S6E9 / 18 Jan 2018
Slamigan
S6E10 / 25 Jan 2018
Law of the Jungle
S6E11 / 01 Feb 2018
The F Is For
S6E12 / 01 Mar 2018
Hiding Not Seeking (II)
S6E13 / 08 Mar 2018
Looking for a Lifeline
S6E14 / 22 Mar 2018
The Chance to Forgive
S6E15 / 22 Mar 2018
The One That Matters Most
S6E16 / 29 Mar 2018
Put White On Me
S6E17 / 05 Apr 2018
When They See Us Coming
S6E18 / 12 Apr 2018
Where I Want to Be
S6E19 / 19 Apr 2018
The Strongest Among Us
S6E20 / 26 Apr 2018
The Unrivaled Standard
S6E21 / 03 May 2018
One for the Ages
S6E22 / 10 May 2018
The Grand Gesture
S6E23 / 10 May 2018
Season 7
A Closer Eye
S7E1 / 26 Sep 2018
Going to War (I)
S7E2 / 03 Oct 2018
Thirty Percent Sleight of Hand
S7E3 / 10 Oct 2018
This Isn't Charity
S7E4 / 17 Oct 2018
A Volatile Mixture
S7E5 / 24 Oct 2018
All the Proof
S7E6 / 31 Oct 2018
What Will Define You
S7E7 / 07 Nov 2018
The Solution to Everything
S7E8 / 14 Nov 2018
Always a Catch
S7E9 / 05 Dec 2018
Inside These Walls
S7E10 / 09 Jan 2019
You Choose
S7E11 / 16 Jan 2019
Make This Right
S7E12 / 23 Jan 2019
The Plunge
S7E13 / 06 Feb 2019
It Wasn't About Hockey
S7E14 / 13 Feb 2019
What I Saw (I)
S7E15 / 20 Feb 2019
Fault in Him
S7E16 / 27 Feb 2019
Move a Wall
S7E17 / 27 Mar 2019
No Such Thing as Bad Luck
S7E18 / 03 Apr 2019
Until the Weather Breaks
S7E19 / 24 Apr 2019
Try Like Hell
S7E20 / 08 May 2019
The White Whale
S7E21 / 15 May 2019
I'm Not Leaving You
S7E22 / 22 May 2019
Season 8
Sacred Ground
S8E1 / 25 Sep 2019
A Real Shot in the Arm
S8E2 / 02 Oct 2019
Badlands
S8E3 / 09 Oct 2019
Infection (I)
S8E4 / 16 Oct 2019
Buckle Up
S8E5 / 23 Oct 2019
What Went Wrong
S8E6 / 30 Oct 2019
Welcome to Crazytown
S8E7 / 06 Nov 2019
Seeing Is Believing
S8E8 / 13 Nov 2019
Best Friend Magic
S8E9 / 20 Nov 2019
Hold Our Ground
S8E10 / 08 Jan 2020
Where We End Up
S8E11 / 15 Jan 2020
Then Nick Porter Happened
S8E12 / 22 Jan 2020
A Chicago Welcome
S8E13 / 05 Feb 2020
Shut It Down
S8E14 / 12 Feb 2020
Off the Grid (I)
S8E15 / 26 Feb 2020
The Tendency of a Drowning Victim
S8E16 / 04 Mar 2020
Protect a Child
S8E17 / 18 Mar 2020
I'll Cover You
S8E18 / 25 Mar 2020
Light Things Up
S8E19 / 08 Apr 2020
51's Original Bell
S8E20 / 15 Apr 2020
Season 9
Rattle Second City
S9E1 / 11 Nov 2020
That Kind of Heat
S9E2 / 18 Nov 2020
Smash Therapy
S9E3 / 13 Jan 2021
Funny What Things Remind Us
S9E4 / 27 Jan 2021
My Lucky Day
S9E5 / 03 Feb 2021
Blow This Up Somehow
S9E6 / 10 Feb 2021
Dead of Winter
S9E7 / 17 Feb 2021
Escape Route
S9E8 / 10 Mar 2021
Double Red
S9E9 / 17 Mar 2021
One Crazy Shift
S9E10 / 31 Mar 2021
A Couple Hundred Degrees
S9E11 / 07 Apr 2021
Natural Born Firefighter
S9E12 / 21 Apr 2021
Don't Hang Up
S9E13 / 05 May 2021
What Comes Next
S9E14 / 12 May 2021
A White-Knuckle Panic
S9E15 / 19 May 2021
No Survivors
S9E16 / 26 May 2021
Season 10
Mayday
S10E1 / 22 Sep 2021
Head Count
S10E2 / 29 Sep 2021
Counting Your Breaths
S10E3 / 06 Oct 2021
The Right Thing
S10E4 / 13 Oct 2021
Two Hundred
S10E5 / 20 Oct 2021
Dead Zone
S10E6 / 27 Oct 2021
Whom Shall I Fear?
S10E7 / 03 Nov 2021
What Happened at Whiskey Point?
S10E8 / 10 Nov 2021
Winterfest
S10E9 / 08 Dec 2021
Back with a Bang
S10E10 / 05 Jan 2022
Fog of War
S10E11 / 12 Jan 2022
Show of Force
S10E12 / 19 Jan 2022
Fire Cop
S10E13 / 23 Feb 2022
An Officer with Grit
S10E14 / 02 Mar 2022
The Missing Piece
S10E15 / 09 Mar 2022
Hot and Fast
S10E16 / 16 Mar 2022
Keep You Safe
S10E17 / 06 Apr 2022
What's Inside You
S10E18 / 13 Apr 2022
Finish What You Started
S10E19 / 20 Apr 2022
Halfway to the Moon
S10E20 / 11 May 2022
Last Chance
S10E21 / 18 May 2022
The Magnificent City of Chicago
S10E22 / 25 May 2022
Season 11
Hold on Tight
S11E1 / 21 Sep 2022
Every Scar Tells a Story
S11E2 / 28 Sep 2022
Completely Shattered
S11E3 / 05 Oct 2022
The Center of the Universe
S11E4 / 12 Oct 2022
Haunted House
S11E5 / 19 Oct 2022
All-Out Mystery
S11E6 / 02 Nov 2022
Angry Is Easier
S11E7 / 09 Nov 2022
A Beautiful Life
S11E8 / 16 Nov 2022
Nemesis
S11E9 / 07 Dec 2022
Something for the Pain
S11E10 / 04 Jan 2023
A Guy I Used to Know
S11E11 / 11 Jan 2023
How Does It End?
S11E12 / 18 Jan 2023
The Man of the Moment
S11E13 / 15 Feb 2023
Run Like Hell
S11E14 / 22 Feb 2023
Damage Control
S11E15 / 01 Mar 2023
Acting Up
S11E16 / 22 Mar 2023
The First Symptom
S11E17 / 29 Mar 2023
Danger Is All Around
S11E18 / 05 Apr 2023
Take a Shot at the King
S11E19 / 03 May 2023
Never, Ever Make a Mistake
S11E20 / 10 May 2023
Change of Plans
S11E21 / 17 May 2023
Red Waterfall
S11E22 / 24 May 2023
Season 12
Barely Gone
S12E1 / 17 Jan 2024
Call Me McHolland
S12E2 / 24 Jan 2024
Trapped
S12E3 / 31 Jan 2024
The Little Things
S12E4 / 07 Feb 2024
On the Hook
S12E5 / 21 Feb 2024
Port in the Storm
S12E6 / 28 Feb 2024
Red Flag
S12E7 / 20 Mar 2024
All the Dark
S12E8 / 27 Mar 2024
Something About Her
S12E9 / 03 Apr 2024
The Wrong Guy
S12E10 / 01 May 2024
Inside Man
S12E11 / 08 May 2024
Under Pressure
S12E12 / 15 May 2024
Never Say Goodbye
S12E13 / 22 May 2024
Season 13
A Monster in the Field
S13E1 / 25 Sep 2024
Ride the Blade
S13E2 / 02 Oct 2024
All Kinds of Crazy
S13E3 / 09 Oct 2024
Through the Skin
S13E4 / 16 Oct 2024
Down the Rabbit Hole
S13E5 / 23 Oct 2024
Birds of Prey
S13E6 / 06 Nov 2024
Untouchable
S13E7 / 13 Nov 2024
Quicksand
S13E8 / 20 Nov 2024
A Favor
S13E9 / 08 Jan 2025
Chaos Theory
S13E10 / 22 Jan 2025
In the Trenches (I)
S13E11 / 29 Jan 2025
Relief Cut
S13E12 / 05 Feb 2025
Born of Fire
S13E13 / 19 Feb 2025
Bar Time
S13E14 / 26 Feb 2025
Too Close
S13E15 / 05 Mar 2025
In the Rubble
S13E16 / 26 Mar 2025
A Beast Like This
S13E17 / 02 Apr 2025
Post-Mortem
S13E18 / 16 Apr 2025
Permanent Damage
S13E19 / 23 Apr 2025
Cut Me Open
S13E20 / 07 May 2025
The Bad Guy
S13E21 / 14 May 2025
It Had to End This Way
S13E22 / 21 May 2025
Season 14
Kicking Down Doors
S14E1 / 01 Oct 2025
Primary Search
S14E2 / 08 Oct 2025
All in the Blood
S14E3 / 15 Oct 2025
Mercy
S14E4 / 22 Oct 2025
Ghosts
S14E5 / 29 Oct 2025
Broken Things
S14E6 / 05 Nov 2025
Pierce the Vein
S14E7 / 12 Nov 2025
A Man Possessed
S14E8 / 07 Jan 2026
Crime of Passion
S14E9 / 14 Jan 2026
Carry a Torch
S14E10 / 21 Jan 2026
Frostbite Blue
S14E11 / 28 Jan 2026
Coming in Hot
S14E12 / 04 Feb 2026
Reckoning (I)
S14E13 / 04 Mar 2026
Hit and Run
S14E14 / 11 Mar 2026
Do Not Resuscitate
S14E15 / 18 Mar 2026
Firehouse 66
S14E16 / 01 Apr 2026
Sway
S14E17 / 08 Apr 2026
Taylor Kinney
Kelly Severide
David Eigenberg
Christopher Herrmann
Joe Miñoso
Joe Cruz
Christian Stolte
Randy 'Mouch' McHolland
Miranda Rae Mayo
Stella Kidd
Hanako Greensmith
Violet Mikami
Jocelyn Hudon
Paramedic Lyla 'Lizzie' Novak
