Chief Boden and Jimmy find themselves at odds in dealing with the aftermath of recent events while Kidd is forced to deal with her unstable and volatile ex, Grant. With the help of firehouse 51, Dawson tries to put her best foot forward in her pursuit for fostering Louie. At the urging of Susan Weller, his new political consultant, Casey tends to his Alderman duties and leaves town with her to attend a three-day summit. Much to his surprise, Casey embraces his new role while Susan urges him to consider grander aspirations. Meanwhile, the house responds to a dangerous structure fire that puts one of their own in a desperate situation.
s04e01 - Let It Burn
s04e02 - A Taste of Panama City
s04e03 - I Walk Away
s04e04 - Your Day Is Coming
s04e05 - Regarding This Wedding
s04e06 - 2112
s04e07 - Sharp Elbows
s04e08 - When Tortoises Fly
s04e09 - Short and Fat
s04e10 - The Beating Heart (1)
s04e11 - The Path of Destruction
s04e12 - Not Everyone Makes It
s04e13 - The Sky Is Falling
s04e14 - All Hard Parts
s04e15 - Bad for the Soul
s04e16 - Two T's
s04e17 - What Happened to Courtney
s04e18 - On the Warpath
s04e19 - I Will Be Walking
s04e20 - The Last One for Mom
s04e21 - Kind of a Crazy Idea
s04e22 - Where the Collapse Started
s04e23 - Superhero
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.