A textbook rescue turns into anything but; Boden prepares to start a new family; Molly's II is unveiled; a misunderstanding sends a ripple through Casey and Dawson's relationship.
Dawson's off-book move during a call threatens her relationship with Casey.
Firehouse 51 scrambles to save lives during a helicopter disaster.
In part one of the crossover with Law & Order: SVU and Chicago P.D., Severide returns from Vegas with a huge surprise that sends ripples through Firehouse 51.
Herrmann pushes Dawson to the limit while Casey faces down his corrupt brother-in-law.
Severide confronts his demons in an unexpected way while Dawson and Mills struggle with their new roles.
Severide returns to Firehouse 51 still reeling from the loss of Shay.
In the Season 3 premiere, Firehouse 51 reels from the devastating loss of a teammate.
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.
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