In the season finale, a boarding school fire leaves Severide shaken as Boden's grand plans take a detour.
The firehouse pulls together to help Dawson retake the firefighters' exam; the station welcomes a new squad member; Shay receives an uninvited guest; Boden makes a bold move.
A massive explosion sends Chicago into chaos - and 51 to the rescue.
Firehouse 51 struggles to cope after the tragic death of Rebecca Jones; Severide performs one final gesture for Bloom; Boden seeks to reconnect with Donna.
Jones fights to stay on at Firehouse 51 while Dawson and Shay take a girls' weekend at a remote cabin.
A father's heroic sacrifice affects the entire squad - and leads to an unexpected threat.
Keeler's disappearance ignites an investigation into everyone with a motive from Firehouse 51.
With Keeler a free man, Severide takes matters into his own hands.
Severide and Chicago P.D. hunt for Katie while Dawson faces the final test of her training.
Firehouse 51 steps in when a blackout causes chaos during a frigid night in Chicago.
Casey continues to deny his lingering injuries; Shay receives stunning news about Darryl's suicide; Dawson struggles to keep a damning secret.
Dawson faces an uphill battle - and unlikely competition - as a new recruit at the academy. Meanwhile, Casey discovers a lingering injury and Mills receives life-changing news.
On the verge of closure, Firehouse 51 bands together in a fight to save the station.
Dawson and Casey's romance escalates while Shay hits rock bottom and goes MIA.
A drive-by shooting forces Cruz to make a big decision while Casey and Dawson struggle to keep their feelings at bay.
Firehouse 51 is thrust into the furnace with a train derailment.
Old friends and enemies return to haunt Firehouse 51, for better and worse.
Taylor Kinney discusses Severide's dramatic rescue in "Joyriding."
Led by Chicago P.D.'s Detective Lindsay, the station searches for a known criminal seeking revenge on Severide.
The actress behind Rebecca Jones describes filming her first fire experience.
Taylor Kinney talks filming in freezing weather, set destruction and the future of crossovers.
Taylor Kinney praises Top Dog winner Smokey, stresses fire safety and chats about Season 3.
Co-creator Michael Brandt discusses the challenge of crashing a real train.
Casey races against a raging fire to save himself - and a rescued baby - from certain death.
The man behind Otis explains what makes Chicago Fire classic.
A fire breaks out at a boarding school in the Season 2 finale, and Severide questions himself in the aftermath of the blaze. Elsewhere, Dawson retakes the fireman's exam, with some political help from Casey Mills searches for answers about his father's past and Boden's plans go awry.
The actor covers the Season 2 finale, bartending and the show's biggest fire so far.
As the firemen help a graffiti artist down from a ladder, Detective Voight arrives on the scene continuing to threaten Casey, this time by throwing Hallie's name into the mix.
The cast issues an important PSA for the often overlooked threat of lampposts.
Watch the show's biggest fire yet come to life behind the scenes.
Chicago Fire co-creator Michael Brandt chats about the show's biggest burn, finale surprises and organic crossovers.
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