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As the firefighters, rescue squad and paramedics of Chicago Firehouse 51 forge headfirst into danger, the choices they make can mean the difference between life and death; but from the relentless pressure of saving lives, an extended family is forged; led by Chief Wallace Boden, Matthew Casey, Kelly Severide and the others know -- when it's go time, Firehouse 51 lays it all on the line for each other; this high-octane drama from Executive Producer Dick Wolf offers an edge-of-your-seat view into the lives of everyday heroes committed to one of America's noblest professions.
S12, EP5 "On the Hook"
After their defibrillator malfunctions on a call, Brett and Violet search for answers; Herrmann tries to find the perfect home for his new recliner; a secret from Gibson's past comes to light.
S12, EP6 "Port in the Storm"
Firehouse 51 welcomes back some familiar faces and says goodbye to Brett; Violet scrambles to decorate Brett's wedding venue; a call at the expo center takes a shocking turn.
S12, EP7 "Red Flag"
Violet clashes with her new partner; Severide discovers a hidden stash of money on a call and squares off against the cops working the case; Mouch gets a parking ticket.
S12, EP8 "All the Dark"
A hazmat call at a dialysis center leads to a shocking discovery; Boden clashes with Paramedic Chief Robinson; Carver notices a concerning change in Gibson's behavior.
S12, EP4 "The Little Things"
Julia spends a couple of days at 51; Boden's stepson, James, returns, desperate for Boden to help his mother; after a little girl starts a fire in her backyard, Kidd and her team decide to dig deeper.
S12, EP3 "Trapped"
After witnessing a domestic dispute, Brett and Violet decide to take the investigation into their own hands; Mouch vets Truck 81's new firefighter; Herrmann relies on something new to aid him on the job.
S12, EP2 "Call Me McHolland"
Mouch sets out to change his legacy and nickname; Ritter pushes Herrmann to see a doctor; Brett searches for the perfect wedding venue.