After ten unforgettable years, Chicago Fire fans are saying farewell to Kara Killmer and her beloved character, Sylvie Brett. From her first appearance in 2014, Brett quickly became a staple at Firehouse 51—balancing her calm-in-the-storm professionalism with heartfelt vulnerability and fierce loyalty. But now, as Season 12 comes to a close, Brett is stepping away from the team—and heading toward a future that fans have long hoped she would finally find.
Brett’s exit storyline couldn’t be more poetic. In the episode titled “Port in the Storm,” she finally marries Matt Casey (Jesse Spencer), the man with whom she’s shared a slow-burn romance filled with distance, heartache, and second chances. Their wedding—charmingly held in a fish store—may seem unconventional, but for Brett, it’s the emotional culmination of a journey that started with being left at the altar years ago. This time, she gets her happy ending.
Reflecting on her departure in an interview with TV Insider, Killmer explained, “I think this is definitely the natural conclusion for Sylvie’s character arc.” It’s a sentiment echoed by many fans who’ve watched Brett evolve from heartbroken paramedic to a confident woman ready to start a new chapter in Portland, Oregon with Casey and her adopted daughter.
And what a send-off it was. Kara Killmer’s final scene as Brett takes place during the wedding reception at Molly’s—a moment filled with laughter, celebration, and, fittingly, a tower of cake. “It doesn’t get much better than that,” she said, clearly savoring the memory.
But is this truly goodbye? Not necessarily.
Just like Casey made brief returns after his initial exit in Season 10, Killmer is leaving the door wide open. “Anytime they want to ask, I will be there, for sure,” she told TV Insider. However, she did have one condition for returning: “If Sylvie makes an appearance at 51 again, she better be pregnant.” With her growing family, fans may yet see Brett visit Chicago as her life continues to evolve.
Brett’s journey reminds viewers that even in a high-stakes world of emergencies and firefighting, personal healing and love still matter. Her departure leaves a noticeable hole at Firehouse 51—not just in terms of paramedic skills, but in the emotional heart of the team.
As Chicago Fire moves forward into Season 13, new challenges and faces will undoubtedly emerge. But Brett’s legacy, her warmth, and her resilience will remain imprinted in every call the team answers.
For now, fans can take comfort in knowing that Sylvie Brett got the closure—and the fairytale—she so richly deserved. And maybe, just maybe, she’ll be back… with a baby in tow.
