Original air date: 10/03/2018 Runtime: 40:50 min. Firehouse 51 is faced with a daunting challenge when an out of control blaze consumes a 15-story apartment complex, trapping victims on the top floors. Complicating the rapidly escalating situation, members soon discover that someone close to home may be one of the trapped victims.
Original air date: 11/07/2018 Runtime: 41:27 min. Severide faces some major adversity and Kidd is on a mission to help in any way she can. Following a car accident rescue involving a teenage girl and her young sister, a suspicious Brett has an unsettling feeling there is more to the story than what appears on the surface.
Original air date: 01/16/2019 Runtime: 41:46 min. Severide's side project of fixing the boat for a wealthy acquaintance turns complicated and personal. Meanwhile, his relationship with Kidd is at a crossroads. Brett helps Casey search for a new apartment and Firehouse 51 decides to enter Tuesday in a dog competition.
Original air date: 01/23/2019 Runtime: 41:46 min. When the firehouse is called to a motorcycle crash, Casey and Severide sense that the details don't add up and work to determine exactly what transpired. A rift develops between Mouch and Otis. Brett, Foster and Kidd work to secretly fix a dent in the ambulance bumper they believe they unknowingly caused.
Original air date: 02/13/2019 Runtime: 40:13 min. Brett, Foster and Kidd take a road trip to Indiana for a getaway and encounter a bus accident involving a boy's hockey team that will leave them scrambling and relying on their instincts to save those hurt in the accident. The rest of Firehouse 51 competes in the annual Chili Cook Off.
Original air date: 02/20/2019 Runtime: 41:58 min. In the first part of a crossover with "Chicago P.D.," a spate of robberies comes to light after a firehouse lockbox key goes missing. CPD's Voight has suspicions that a firefighter may be involved, and with Boden's support he recruits Cruz to go undercover and help sniff out any suspicious activity.
Original air date: 02/27/2019 Runtime: 41:54 min. During an emergency call, an unsuspecting Lt. Casey suddenly finds his life in peril. Grissom (guest star Gary Cole) warns the firehouse that they will need to gear up for a performance evaluation. Otis discovers he won a raffle prize at a recent fundraiser and Brett is met with challenges in her personal life.
Original air date: 03/27/2019 Runtime: 40:46 min. Tensions run high between Casey and Herrmann after the firehouse responds to an apartment complex fire. After discovering something extremely suspicious during the call, Kidd and Severide do some investigating and get CPD on the case. Brett struggles to deal with her emotions while Herrmann's wife, Cindy, hopes to get her interior design business on track by taking a stab at redoing the common room.
Original air date: 04/03/2019 Runtime: 41:49 min. Severide gets angry at Cruz when he feels his orders were disobeyed in the field. Boden reconnects with an old high school friend during a call to a house fire. Herrmann has issues when one of his favorite knick knacks from Molly's goes missing.
Original air date: 04/24/2019 Runtime: 40:19 min. A horrible storm wreaks havoc on Chicago and impacts Firehouse 51 when the power goes off. A little boy mysteriously shows up at the station and everyone works together to uncover who he belongs to and why he ended up there. Foster and Kidd argue about Severide.