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 grows impatient and takes matters into his own hands. Meanwhile, Jones struggles to fit in as the new candidate at 51.
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.
Severide performs the save of his career, while Arthur escalates the stakes at Molly's.
Pressure is on Chief Boden to resign from Firehouse 51, while mobster Arthur squeezes a struggling Molly's for more cash.
The fallout from a deadly routine call causes a rift between Shay and Dawson. Meanwhile, Severide goes stealth in his pursuit of Hadley.
In a commercial parody, David Eigenberg shows off all the benefits of the fake gas station Voyaco.
Chief Boden ends up in cuffs after a confrontation with a state trooper.
The man behind Kelly Severide talks about the return of Chicago Fire.
As the firehouse staff deals with a tragedy, Dawson receives a suicide note and Severide looks into Bloom's past. Meanwhile, Chief Boden receives distressing news and asks Shay for help finding a crucial item.
Lauren and Monica talk about how long it took to shoot "No Regrets".
David Eigenberg and Eamonn Walker answer fan questions from Twitter.
The Fire Fighters arrive on the scene to find that a car has crashed into a home, and a baby and mother are trapped inside.
Two stuntmen describe how they captured a daring water rescue on film.
Stairs collapse during a rescue attempt and land Severide in serious danger.
Go behind the scenes of Leon's car crash with stuntman Dan Maldonado.
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.
Mills loses control when Benny finally exposes the details surrounding his father's death.
Casey makes a public display, letting Voight know he's not afraid of his threats.
Taylor talks about his role.
Cruz's worst fears come to fruition when a rival gang interrupts Leon's undercover assignment.
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