As the courageous firefighters, rescue squad and paramedics of Chicago Firehouse 51 head first into danger, bravely fighting to save the people of their city from peril, they also forge deep, unbreakable bonds with each other.
After Damon disobeys Kidd's orders on a call, he turns to Severide to protect him; Herrmann searches for the perfect scent to spice things up with Cindy.
Violet risks her job to deliver a baby on a tragic call; Mouch, Capp and Tony help Cruz track down Javi's stolen bike; Damon's departure weighs on Severide.
Kidd and Severide investigate a trucking company responsible for a string of accidents; Herrmann recruits Kylie to help get new radios; Firehouse 51 celebrates Violet's birthday; Carver's allegiances are torn.
Severide gets wrapped up in an Illinois State Police investigation after discovering illegal guns on a call; a bird harasses Mouch on the apparatus floor; Kidd keeps an eye on Carver as his attitude worsens.
Pascal and Severide revisit the storage facility fire in hopes of uncovering new evidence; Cruz helps Mouch take his studying to the next level; Novak prepares a proposal for Chief Robinson for a whole blood program.
Herrmann and Mouch prepare to take their officer exams; Cruz receives a chilling omen; Carver takes care of a dog after its owner is injured on a call.
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.
Chicago's first responders unite in the wake of a catastrophic gas explosion and fire that threaten a city government building; Herrmann reluctantly shadows Pascal while Violet, Novak and Dr. Frost take charge of triage efforts on site.
Herrmann investigates the rise in missing fire hydrants and teams up with Kylie to track them down; Kidd's cousin comes to town, revealing surprising family history; Violet and Novak treat the victim of a birthday cake smash gone awry.
After a daring rescue at an adventure park, Kidd asks Severide to create a ropes course for Girls on Fire; Violet's former nemesis returns, pleading for her help; Herrmann creates a signature cocktail for Molly's.
A surprise visitor from Novak's past joins Ambo for a late-night ride-along; Herrmann faces a mountain of Chief-level training records and incident reports; Violet catches Carver in a lie.
In the face of adversity, Pascal searches for justice; Violet struggles to write a letter to Carver; Damon returns to the floater pool hoping to secure a permanent spot at 51.
Kidd connects with a troubled teen interested in Girls on Fire; Cruz, Capp and Tony eagerly wait to try out Squad's new saw; Violet and Novak are stumped by a bodybuilder who passed out at the gym.
Deputy Commissioner Boden returns to Firehouse 51 to investigate a disastrous firefight and the surrounding mystery that left one of their own in peril.
Severide investigates an old house fire from 10 years back in which Kidd had responded; Carver and Violet search for a mystery medic who abandoned a victim; Novak looks for a roommate.
With the crew stretched thin, a performance efficiency expert evaluates Firehouse 51; Kidd and Severide bond with the mother of the baby they hope to adopt.
Kidd strengthens her bond with Natalie during a road trip; Severide investigates a car fire and uncovers surprising evidence; Violet receives a career opportunity after being featured in a local newspaper.
Severide puts his job on the line to help out one of their own; Kidd navigates Natalie's complicated relationship with her sister; Herrmann prepares to take the Chief test.
Sacred Ground
S8 E1
The mattress factory fire spirals out of control; truck and squad lay it on the line in hopes of getting the trapped victims out alive.
A Real Shot in the Arm
S8 E2
Casey struggles to get Boden to sign off on an energetic new recruit; Foster extends an olive branch to her irritating new medic; Otis inspires Herrmann to seek new partners at Molly's; Brett realizes life in Fowlerton will take some getting used to.
Badlands
S8 E3
Brett and Foster question the suspicious circumstances surrounding an attack at a juvenile detention center; a convoluted new technology at Firehouse 51 tests everybody's patience; Kidd is chosen to represent the district at a leadership conference.
Infection, Part I
S8 E4
A rare but deadly bacteria takes its toll on numerous victims around the city, leaving Chicago's finest first responders to work together alongside the CDC to resolve the dangerous situation; Severide suspects something bigger is happening.
Buckle Up
S8 E5
Kidd must prove herself at the National Firefighter Leadership Conference, while the rest of Firehouse 51 is called to two eerily similar car wrecks; Mouch tries to keep the firehouse informed by starting a newsletter; Cruz deals with a heartbreak.
What Went Wrong
S8 E6
Cruz and Severide suspect foul play when a fire started by an elderly woman turns deadly. Kidd, Foster and Brett create a women's-only lounge. Firehouse 51 celebrates some good news.
Welcome to Crazytown
S8 E7
Severide must make a tough decision about the future of his career at Firehouse 51; Herrmann deals with the consequences of his temper; Cruz is excited to demonstrate the Slamigan at the Firefighting Expo; Commissioner Grissom returns.
Seeing Is Believing
S8 E8
Severide starts off on the wrong foot at his Office of Fire Investigation assignment when, despite orders, he reopens an old case; Herrmann is on a mission to discover what caused an apartment fire; Kidd finds herself burning the candle at both ends.
Best Friend Magic
S8 E9
An unexpected visit throws Casey for a loop; Severide sets out to exonerate a wrongly convicted arsonist; Kidd pays the price for burning the candle at both ends; Cruz goes on a mission to fix one of Otis's old toys.
Hold Our Ground
S8 E10
Members of Firehouse 51 are dismayed to learn their boundaries have been redrawn to overlap with an adjacent station, and problems quickly arise; Casey and Gallo hunt a missing piece of equipment; Brett and Foster find themselves at odds.
Where We End Up
S8 E11
A pest control problem forces the 51 team to temporarily bunk with Firehouse 20; all under the same roof, Casey clashes with Capt. Delaney, while Foster, Kidd and Brett fear Capt. Leone has it out for them; Boden mulls a procedural overhaul.
Then Nick Porter Happened
S8 E12
A series of false alarms at a private school hinders 51's ability to respond to legitimate emergencies; Kidd asks for ideas to surprise Severide on his birthday; Cruz and Brett rent out their extra room but get more than they bargained for.
A Chicago Welcome
S8 E13
The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51; Boden and Severide are asked to make peace with an old foe for the greater good; Brett receives family news while Foster plans a party with friends.
A Volatile Mixture
S7 E5
Casey helps a reporter uncover the truth behind a trailer park fire; Boden attempts to make peace with Grissom; Hermann, Otis and Kidd take action when Molly's receives a bad Yelp review; Severide reaches out to his father for a favor.
All the Proof
S7 E6
Gorsch continues his reign of terror at Firehouse 51, taking over Boden's morning meeting and going out on calls in Boden's place; Brett and Foster respond to a call where a Halloween prank has turned deadly serious.
What Will Define You
S7 E7
Kidd and the team embark on a mission to help Severide as he struggles to process his father Benny's death; Brett suspects a teenage driver in a car accident is hiding something.
The Solution to Everything
S7 E8
Severide lands in grave danger when Firehouse 51 battles a risky structure fire; Casey lends another helping hand to Naomi, the investigative reporter; Herrmann, Mouch, Otis and Cruz search for a tantalizing memento from Boden's past.
Always a Catch
S7 E9
Firehouse 51 responds to a massive freeway accident that impacts someone close to them; Foster runs into someone from her past after a harrowing call; Casey and Naomi grow closer; Severide and Kidd's relationship is tested.
Inside These Walls
S7 E10
Casey and Naomi fight to escape a raging fire in Casey's apartment; Brett and the team struggle to create an engaging community fire safety presentation; Severide and Kidd's relationship reaches a crossroads.
You Choose
S7 E11
Foster faces blowback after pointing out a doctor's oversight; Brett helps Casey look for a new apartment; Kidd prepares Tuesday the Dalmatian for the Fire Safety Dog Competition; a serious accusation is leveled against Severide.
Make This Right
S7 E12
Casey further investigates a motorcycle accident at the request of the victim's son; Kidd, Foster and Brett bond while helping Kidd fix a mistake; Mouch and Otis have a falling out after Otis' teasing hits a sore spot.
The Plunge
S7 E13
Cruz leads the charge in getting the firehouse to gear up for the Polar Plunge; Herrmann has a hard time bouncing back after dealing with a tough call; Foster's personal relationships begin to interfere with her job.
Fault in Him
S7 E16
Casey struggles after experiencing a narrow miss on a call; Otis wins a unique sporting opportunity in a raffle; Grissom turns to Severide for assistance when the mayor's office sends a task force to Firehouse 51.
Move a Wall
S7 E17
Tensions run high between Casey and Herrmann after the firehouse responds to an apartment complex fire; after discovering something extremely suspicious during the call, Kidd and Severide do some investigating and get CPD on the case.
No Such Thing as Bad Luck
S7 E18
Severide gets angry at Cruz when he feels his orders were disobeyed in the field; Boden reconnects with an old high school friend during a call to a house fire. Herrmann has issues when one of his favorite knick-knacks from Molly's goes missing.
Until the Weather Breaks
S7 E19
A horrible storm wreaks havoc on Chicago and impacts Firehouse 51 when the power goes off; when a little boy mysteriously shows up at the station, everyone works together to uncover who he belongs to; Foster and Kidd argue about Severide.
Try Like Hell
S7 E20
Severide and Boden search to uncover whether arson was the cause of a fire at a hair salon; Mouch, Herrmann, Otis and Kidd make a startling discovery while tracking down the missing piercing nozzle from Engine 27.
The White Whale
S7 E21
A serial arsonist cold case is reopened when Lt. Severide finds a connection to a recent salon fire; Firehouse 51 celebrates a retirement party.
I'm Not Leaving You
S7 E22
Severide and Kidd continue to investigate Benny's old arson case; unexpected news leads Brett to ponder a big decision; all hell breaks loose.
The Hose or the Animal
S5 E1
Severide and Stella keep an eye out for Grant; Louie has Dawson questioning her dangerous career path; Casey's relationship with Susan Weller cools down; tensions between Borrelli and Boden reach a boiling point.
Scorched Earth
S5 E3
Casey gets help from Susan Weller for an urgent personal matter; Severide is given an opportunity to travel with Travis Brenner; Stella saves a street kid from a tunnel fire.
Nobody Else Is Dying Today
S5 E4
Casey is forced to use extreme measures to save a father and daughter from an acid spill; Dawson and Brett respond to an elderly woman who has a difficult senior advocate; Otis shares some exciting news.
On the Warpath
S4 E18
A call takes a bad turn when Brett witnesses a murder while aiding a victim who has a leg wound; a restaurant fire has people trapped inside a vault; Mouch gets cold feet about his upcoming wedding.
I Will Be Walking
S4 E19
Casey attempts to use political influence to remedy a gang retribution incident; Severide helps Holloway in a dangerous undercover investigation.
The Last One for Mom
S4 E20
Detective Holloway testifies in court as part of an undercover operation, leaving Severide to watch her young son; a fire at an art gallery with a victim trapped inside leads Cruz to make a rash decision.
Kind of a Crazy Idea
S4 E21
Dawson risks her life to save a boy in an apartment fire; Severide pushes for an upgrade on the house's fire masks; Cruz and Brett have an idea to get Otis to take a blood test.
Where the Collapse Started
S4 E22
A building collapses and leaves dozens of people trapped and injured; Chief Boden faces a life-or-death decision in the rescue plan; Dawson continues her quest to foster Louie; tensions flare between Casey and Antonio.