A new recruit with ties to the CFD tests Serveride's patience. Violet receives a mysterious note that sends her and Brett on a hunt for the person who wrote it.
s09e01 - Rattle Second City
s09e02 - That Kind of Heat
s09e03 - Smash Therapy
s09e04 - Funny What Things Remind Us
s09e05 - My Lucky Day
s09e06 - Blow This Up Somehow
s09e07 - Dead of Winter
s09e08 - Escape Route
s09e09 - Double Red
s09e10 - One Crazy Shift
s09e11 - A Couple Hundred Degrees
s09e12 - Natural Born Firefighter
s09e13 - Don't Hang Up
s09e14 - What Comes Next
s09e15 - A White-Knuckle Panic
s09e16 - No Survivors
No job is more stressful, dangerous or exhilarating than those of the Firefighters, Rescue Squad and Paramedics of Chicago Firehouse 51. These are the courageous men and women who forge headfirst into danger when everyone else is running the other way. But the enormous responsibilities of the job also take a personal toll.
With big reputations and hefty egos, the pressure to perform and make split-second decisions is bound to put squad members at odds. When a tragedy claims one of their own, there's plenty of guilt and blame to go around. In the middle of a divorce, Lt. Matthew Casey tries to go about business as usual, but can't help butting heads with the brash Lt. Kelly Severide of the Rescue Squad - and each blames the other for their fallen team member. When it's "go-time", though, they put their differences aside and put everything on the line for each other. This is a look inside one of America's noblest professions.