Daniel Kyri

Vasquez fights to prove himself at 51. Violet and Novak pursue a troubling mystery. Herrmann is on a quest to keep Molly’s profitable.

Casey struggles to get Boden to sign off on an energetic new recruit; Foster extends an olive branch to her irritating new medic; Otis inspires Herrmann to seek new partners at Molly's; Brett realizes life in Fowlerton will take some getting used to.

The mattress factory fire spirals out of control; truck and squad lay it on the line in hopes of getting the trapped victims out alive.

Firehouse 51 responds to a massive freeway accident that impacts someone close to them; Foster runs into someone from her past after a harrowing call; Casey and Naomi grow closer; Severide and Kidd's relationship is tested.

Brett, Foster and Kidd take a road trip to Indiana and encounter an accident involving a boys' hockey team that leaves them scrambling and relying on their instincts to save the injured; the rest of Firehouse 51 competes in the annual chili cook-off.

Severide teams up with Seager and the OFI when a motel structure fire turns suspicious; Firehouse 51 members become amateur sleuths following a Reddit post involving one of their own; Brett continues to get invested in her birth mother, Julie.