Dawson's off-book move during a call threatens her relationship with Casey.
Firehouse 51 scrambles to save lives during a helicopter disaster.
Herrmann pushes Dawson to the limit while Casey faces down his corrupt brother-in-law.
Casey must deal with the fallout from his sister's divorce while Brett weighs a move back to Indiana.
Severide confronts his demons in an unexpected way while Dawson and Mills struggle with their new roles.
Tempers flare after a tragic collision between two fire trucks - and Cruz may pay the price.
Severide returns to Firehouse 51 still reeling from the loss of Shay; Dawson struggles with her new truck assignment; Mills learns more about his father's family; Cruz and Mouch pitch Molly's Two to Herrmann.
In the Season 3 premiere, Boden forces Firehouse 51 to pull themselves together in the aftermath of a tragic explosion.
For the tough-minded leader of the Intelligence Unit, there's a gray area between right and wrong.
In the season finale, a boarding school fire leaves Severide shaken, and Boden's grand plans take a detour.
The firehouse pulls together to help Dawson retake the firefighter's exam.
In the first hour of a crossover event with Chicago P.D., the firehouse is tested like never before when a massive explosion sends Chicago into chaos.
Firehouse 51 struggles to cope after the tragic death of candidate Rebecca Jones.
Jones fights to stay on at 51 while Dawson and Shay take a girls' weekend to a remote cabin.
A father's heroic sacrifice affects the entire squad - and leads to an unexpected threat.
Yuri Sardarov reveals the less-super side of toxic spill superpowers and why they must be prevented.
Severide and Brittany bid an emotional farewell and end their marriage.
When the squad disrupts a local gang's drug trade operation, the gang members declare war on Firehouse 51.
Severide makes a difficult decision that unfortunately means the end for him and Renee.
In a touching ceremony, Chief Boden and Donna get married at Firehouse 51.
Evidence is revealed during a seemingly routine house fire that demands the attention of the police, triggering the arrival of Det. Voight and Det. Lindsay. Meanwhile, Mills mulls over an off-duty gig.
Led by Chicago P.D.'s Detective Lindsay, the station searches for a known criminal seeking revenge on Severide.
Chicago Fire arrives on a scene to put out a stove fire, but find the person responsible in a bizarre location and position.
At the scene of a brutal car accident, Mills springs into action to prevent a victim from committing suicide.
Yuri Sardarov, who plays Otis, discusses the upcoming drama in Chicago Fire's third season.
Out of options, Casey delivers a baby himself at the scene of a car accident.
Eigenberg discusses how Herrmann deals with being underestimated.
Severide rediscovers an emotional memory from Shay's past.
Lt. Matthew and Gabriella are ordered off of the roof but are forced to repel down the side of the building.
Dick Wolf explains the daunting - but satisfying - task of linking Chicago Fire, Chicago P.D. and Law & Order: SVU to a single story.
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