The loss of a comrade leaves a bitter residue of guilt and recrimination. Lieutenant Matthew Casey, commanding the Truck company, struggles to maintain composure, finding himself in constant conflict with Lieutenant Kelly Severide of the Re…

Severide carries a hidden wound – a serious shoulder injury he earned in the fire that claimed Andy Darden’s life. The pain is compounded by guilt as he battles to save a construction worker from a building collapse. His burden deepens at t…

Casey is under mounting pressure to shield the son of a police officer, a young man whose drunken driving caused a devastating accident that left a teenager paralyzed. Elsewhere, Severide disregards his doctor's cautions, aware that his nec…

Chief Boden faces accusations of abandoning a homeless man in a warehouse fire after directing his officers to clear the area, a situation that has generated unfavorable publicity and strained relations within the department. Elsewhere, Lie…

Casey challenged Detective Voight regarding his aggressive methods, declaring his intention to resist any intimidation. His defiance, however, would have consequences. Elsewhere, Dawson faced repercussions for her actions while working. Sim…

With suspension looming, Dawson finds an unexpected ally in the very woman she had aided, the same girl now facing the disciplinary board as a consequence of those procedures. Lieutenant Casey’s patience wears thin as Detective Voight relen…

Following a call to a daycare center where they encountered a makeshift methamphetamine laboratory, every member of the firehouse is required to undergo drug testing. Severide hesitates, apprehensive about the potential exposure of his inju…

The scene of the train wreck left Peter Mills profoundly shaken. The sight of a young victim’s lifeless form stirred within him a deep and unsettling grief, casting a shadow of doubt over his future as a firefighter. Elsewhere, Dawson and S…

Following a devastating fire at an auto machine shop, Jose Vargas is sidelined by injury and forced into disability, a circumstance that compels him to leave the life he has always known as a firefighter – a transition proving profoundly di…

Following a kitchen fire at a luxurious townhouse, Casey, Herrmann, Mouch, Cruz, Otis, and Mills find themselves embroiled in accusations of theft – a $50,000 diamond necklace vanished from the premises, sparking an internal investigation. …

Consumed by remorse over Flaco’s death in the blaze, Cruz seeks out Casey to confess his burden. As Shay recovers from her head injury in the ambulance crash, Severide asks Dawson for assistance in managing his own pain. Casey finds himself…

Severide sought out Chief Boden to finally discuss his injury, and in doing so, began to make significant choices about his life's path. Elsewhere, Casey wrestled with personal family issues, while Dawson, upon discovering a lone young girl…

Chief Boden’s unease deepens when a man perishes in a hardware store fire ignited by Ernie, the troubled teenager he's struggled to guide, along with Ernie’s Uncle Ray. Simultaneously, Severide contemplates his path forward and seeks conne…

A shared history surfaces for Severide and Lieutenant Eric Whaley, the newest addition to the firehouse. Dawson confides in Shay, revealing a long-held secret, while Casey wrestles with personal matters. Elsewhere, a contaminated heroin sup…

Dawson tries to assist her brother Antonio in piecing together the complexities of his drug and gang investigation, and in doing so, she secretly seeks help from an unexpected quarter. Casey and his mother, Nancy, navigate the challenges of…

The weight of past mistakes presses down on Cruz, threatening to compromise the safety of himself and his team. Casey and his sister Christie grapple with unresolved tensions surrounding their mother and with each other. Elsewhere, Severide…

The arrival of Lieutenant Severide’s father, Bennie, stirs up old pain, particularly when he finds himself in conflict with Chief Boden regarding the death of a shared friend. Elsewhere, Mills offers aid to a shaken driver responsible for a…

The simmering conflict between Chief Boden and Bennie Severide reached a breaking point when Mills confronted Severide about the fire that took his father's life. Separately, Severide, Casey, and Bennie began to unravel the truth behind two…

A rescue effort at a tenement building ends in sorrow, and the men and women of Firehouse 51 are deeply affected by the loss. Severide’s decision to accelerate Mills' advancement from the Truck company to the Squad team creates friction amo…

A shadow of resentment falls upon Mills as certain colleagues view Severide's support for his ambition to join Squad with disapproval. For a few shifts, a paramedic candidate named Tara joins Dawson and Shay on calls. Elsewhere, Shay offers…

Following accusations of sexual misconduct brought by a former paramedic candidate, Severide confronts a precarious future, navigating threats to his career within the Firehouse and a daunting legal battle. Detective Voight reappears, seeki…

Severide, wrestling with a frustrating predicament, seeks counsel from an unexpected source. Elsewhere, Casey discovers a burgeoning contentment in his private life, a contrast to the personal struggles facing both Mills and Dawson. The fir…

Circumstance compels Lieutenant Casey to collaborate with the Intelligence Unit, now overseen by Voight, whose character seems remarkably unchanged by his time behind bars. Shay anticipates the joys of parenthood with increasing enthusiasm,…

A call from Cook County Jail plunges the squad into a precarious situation, demanding they navigate a rapidly escalating crisis. Shay clings to the hope of motherhood, while Hermann’s wife, Cindy, enters labor with their fifth child. Elsewh…