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1. Bölüm A new face at Firehouse 51 causes tension, while rising chaos in the city brings new challenges to the team. Herrmann stalls on plans of relinquishing his office to Mouch.
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2. Bölüm Vasquez fights to prove himself at 51. Violet and Novak pursue a troubling mystery. Herrmann is on a quest to keep Molly's profitable.
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3. Bölüm When city budget cuts stretch crews thin, Pascal takes matters into his own hands. Vasquez looks to an old friend for help. An incident in the field hits close to home for Violet.
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4. Bölüm Firehouse 51 must band together after a devastating fire catches them off guard. Vasquez continues his quest for answers. Violet and Novak face an unexpected roadblock in the new training protocol.
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5. Bölüm Cruz hunts for the identity of an unknown ally. Mouch takes steps to help a friend. Vasquez must make a difficult choice.
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6. Bölüm A traffic jam forces Violet and Novak to take drastic measures to save a patient. Severide shadows Pascal for a day. Kidd goes the extra mile for Isaiah.
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7. Bölüm Severide investigates a suspicious high school fire. Novak gets an unexpected call. Violet brings a 51 firefighter onboard the ambulance for a shift.
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8. Bölüm When an act of arson harms someone close to the Firehouse 51 family, Severide must track down the perpetrator. Impending budget cuts push Mouch and Pascal to get creative.
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9. Bölüm A member of the Firehouse 51 family remains in peril. Cruz lends a hand to Severide in the ongoing investigation.
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10. Bölüm Novak explores a new romantic connection. Vasquez deals with the aftermath of his father's recent release.
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11. Bölüm Herrmann grows uneasy when a local accident attorney inserts himself into a routine call. Firehouse 51 gets a visitor.
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12. Bölüm Pascal finds himself under intense scrutiny when a member of the firehouse is injured on a call. Herrmann grapples with family issues.
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13. Bölüm Firehouse 51 is called to an airfield when a passenger jet goes silent mid-air, triggering a high-stakes emergency and cracking open a bigger mystery that could put countless lives in jeopardy.
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14. Bölüm Severide is on high alert to track down a reckless driver who puts one of their own in harm's way. A member of Firehouse 51 struggles with a potentially life-changing decision.
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15. Bölüm A car crash puzzles Kidd and Vasquez. Herrmann gets his chance in the spotlight. Violet and Novak deal with a moral dilemma.
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16. Bölüm Severide overcomes new obstacles at the firehouse. Cruz finds himself at a loss amid family changes.
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17. Bölüm After a devastating fire erupts at a surgery center, Kidd works to hunt down the true cause. Violet, Novak and Vasquez grapple with shifting relationships. Molly's hosts its first trivia night.
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21. Bölüm