A deliberate act of arson puts Lieutenant Severide in mortal danger. At the same time, the city's financial consultant, Gail McLeod, examines Station 51 with a critical eye, contemplating whether any firehouses should be deemed expendable. …

Following Heather’s ordeal, Lieutenant Casey struggles to adapt to his increased responsibilities. Lieutenant Severide is taut with anxiety, anticipating the arsonist's next move against the firehouse. With Renee recently returned from visi…

Lieutenant Severide harbors firm convictions regarding the identity of the serial arsonist, though concrete evidence remains elusive. In the aftermath of recent turmoil, Lieutenant Casey navigates a shifting personal landscape, while Molly'…

Lieutenant Severide is eager to connect the dots and expose the serial arsonist, while Dawson and Shay experience a startling event during what should have been a routine call. Simultaneously, suspicion continues to fall on Clarke as the so…

Chief Boden faces a precarious position at Firehouse 51, his past mistakes relentlessly revisited by McLeod, who subtly steers him toward a premature departure. As Boden weighs his choices, McLeod considers an unexpected successor. The iden…

During a run, Severide discovers a deserted construction site and finds a young boy trapped within a backhoe loader, desperately needing help. Meanwhile, Boden and McLeod’s disagreement regarding the firehouse’s future persists, culminating…

The firehouse is summoned to a scene of devastation: a tanker's collision with a commuter train, followed by the train's impact against a warehouse, unleashing a blaze that pushes everyone present to their breaking points as lives hang prec…

The shooting of a young girl in their neighborhood casts a shadow over Cruz and his brother, Leon, forcing them to confront the life they’d desperately sought to leave behind. The conflict between Chief Boden and McLeod intensifies, while I…

Chief Boden gears up for a decisive move against McLeod, hoping to avert the firehouse’s closure, while the burgeoning affection between Dawson and Casey deepens. Leon gains traction in the gangland murder case, yet Cruz grows increasingly …

Hope appears extinguished for Firehouse 51, threatened with closure largely due to Gail McLeod's actions. Yet, Chief Boden and the firefighters of the house will not stand idly by. A call to a blazing apartment building pushes everyone to t…

Lieutenant Casey’s return to Firehouse 51 follows a brush with death during a building collapse. Shay encounters Allison Rafferty, her new partner, who maintains a polite distance from everyone. Dawson embarks on the demanding training prog…

Haunted by a brush with death during a call, Lieutenant Casey insists to himself and those around him that he is fully recovered. Shay, determined to avoid confronting the painful memory of that same event, deflects the persistent inquiries…

A drunk driver's collision with a transformer plunges the neighborhood into darkness on a bitter Chicago night, and the firefighters of Firehouse 51 find themselves thrust into a role of essential support. As many residents seek refuge at t…

A sense of displacement settled over Severide as he departed Detective Lindsay and the Intelligence Unit, leaving them to pursue the search for his sister, Katie. Elsewhere, Shay received an unexpected lead from Chicago Blackhawks players B…

Impatience gnaws at Severide as Vince Keeler is released. Elsewhere, the Firehouse mobilizes with urgency to rescue a girl trapped within a donation bin. Mouch discovers that Boden’s secretary, Connie, is not to be trifled with. The squad a…

Lieutenant Severide finds himself at the forefront as Detective Lindsay begins compiling a list of suspects with the most compelling motives, determined to locate the person responsible for Katie's abduction. Meanwhile, Jones continues to …

A rescue from a car crash stirs echoes of his own history in Lieutenant Severide, compelling him to offer further assistance. At Firehouse 51, Lieutenant Casey and Chief Boden face a difficult decision regarding Jones, bound by a promise ma…

Lieutenant Severide extends a helping hand to Dave Bloom, a firefighter from Denver battling addiction. Meanwhile, Dawson and Shay escape the city for a weekend retreat at a secluded cabin. Elsewhere, Jones grapples with her father's interf…

Dawson received a suicide note, the unexpected delivery leaving him shaken. Meanwhile, Lieutenant Severide delved into Bloom's troubled history, seeking to understand the darkness that drove him. Back at Firehouse 51, Chief Boden was confro…

Lieutenant Casey and Dawson offer their assistance at a charity run held at Chicago Medical Center, only to find the city plunged into turmoil by a devastating explosion. With one of their own lost in the blast, the firehouse faces its most…

Supported by her colleagues, Dawson prepares for the fireman's exam, making final preparations. However, a call to the field threatens to disrupt her carefully laid plans. Meanwhile, Lieutenant Casey has an important matter to discuss with …

The blaze at the boarding school left Lieutenant Severide deeply unsettled, haunted by the possibility of a different outcome. Back at the firehouse, the team rallied around Dawson as she prepared to retake the fireman's exam, and Lieutenan…