The lingering effects of the boat rescue hung over Firehouse 51 as the day wore on. In the common room, Gallo, Ritter, and Violet leaned into a discussion about potential supplementary work.

Footage of Casey's daring rooftop rescue quickly spreads across the internet. Mouch installs a Little Free Library at Firehouse 51. Herrmann disregards established procedure.

The truth of Griffin's father's demise comes to light, revealing the true reason behind his unexpected visit to Casey. Meanwhile, Gallo, Ritter, and Violet begin to strategize for the growth of their microbrewery.

With a newfound confidence, Kidd embraces her role as lieutenant. Chief Hawkins accompanies Ambulance 61 on a call, seeking further insight into Brett. Meanwhile, Casey embarks on a journey away from the city. A planned date night for Ritte…

A pivotal choice shapes Casey's future. Gallo, Ritter, and Violet consent to an interview and accompanying photographs. Meanwhile, Brett and Mouch initiate the paramedicine program. And for Cruz, the prospect of fatherhood draws nearer.

When a significant security failure compromises the city's digital infrastructure, the leadership at Firehouse 51 is compelled to intervene directly. Meanwhile, Severide prepares for an arson investigation.

Gallo finds himself at odds with the temporary lieutenant assigned to replace Casey. Meanwhile, Severide edges closer to a dangerous arsonist whose actions threaten lives.

A dispute over office space ignites tension between Severide and Herrmann. Boden contemplates offering Pelham a permanent position, revisiting the details of his history. Gallo's simmering resentment towards Pelham finally boils over. Meanw…

At Winterfest, Gallo, Violet, and Ritter unveil their new microbrewery venture. Meanwhile, Brett prepares for a presentation of her paramedicine program before an oversight panel. And at Firehouse 51, the crew embraces the festive season.

Stella Kidd is back at Firehouse 51. The team faces a hazardous situation: a fire fueled by potassium erupts within a tunnel. In the aftermath of the incident, Ritter finds himself increasingly concerned for a young officer who bore witness…

During a conversation with Station 37, a firefighter is injured when struck by a power line, and the incident fuels a sudden outburst of anger. Meanwhile, Brett receives a visit from Scott and Amelia. Violet finds an unexpected letter await…

Boden, Kidd, and Severide unite to safeguard a comrade. At the Fire Academy, Herrmann encounters a promising young firefighter. Conversation throughout the station centers on the upcoming annual CFD Gala.

Severide and Seager collaborate on an investigation following a fire at the residence of a young woman facing difficulties. Pelham takes up residence in the precinct's reportedly haunted office. Kylie supports Kidd with the Girls on Fire in…

Chief Hawkins consistently demonstrates a willingness to assist Brett and Violet when they face difficulties. Meanwhile, Kidd is actively seeking a promotion to open lieutenant. A former acquaintance calls upon Mouch and Herrmann for assis…

In the wake of a factory fire, Severide and Seager join forces to follow up on an anonymous lead. Meanwhile, Kidd seeks the ideal candidate to fill the vacancy on Engine 81.

Amidst the chaos of a burning apartment building, Cruz finds an unexpected connection with a young immigrant boy. In the aftermath of the fire, a camaraderie blossoms between them. Back at the station, however, his colleagues begin to plot …

Severide and Kidd collaborate with CPD on a case involving a suspicious car accident. Meanwhile, Hawkins and Violet face challenges to their relationship. Elsewhere, Chloe and Cruz navigate the complexities of a newly formed family dynamic.

When one of their own is taken captive, the firefighters of Firehouse 51 find themselves bound together by a fierce sense of loyalty and duty. They must rally as one to face the danger ahead.

The firefighters of Firehouse 51 confront a blaze ignited by a fallen jet engine, and the shadow of suspicion falls upon one of their own, implicated in a theft connected to the event. Meanwhile, Kidd and Boden harbor reservations about Kyl…

A family acquaintance sought Herrmann's counsel regarding the opening of a bar. Meanwhile, a palpable strain existed between Emma and Violet. Kidd found herself battling to maintain cohesion within her own team.

Mouch and Ritter join forces to unravel a murder. Severide and Cruz respond to a blaze engulfing a food truck. Gallo seeks out Hawkins regarding Violet.

The day of the wedding dawned, and Firehouse 51 buzzed with anticipation as Casey returned to share in the happy occasion. Emma’s hopes for supplanting Violet met an unexpected and startling conclusion.