Every One Chicago Actor Leaving In 2024 (& 1 Who Is Returning in 2025)

NBC’s One Chicago television shows, Chicago Fire, Chicago PD, and Chicago Med, are returning with new seasons in 2024, and at least one cast member from each will be exiting their respective series in the upcoming episodes, while one is coming back. These shows are not unfamiliar with the prospect of characters leaving, seeing as there seems to be a revolving door of series regulars every season that goes by. Characters have died, quit their jobs, left the Windy City, and so on since Chicago Fire premiered in 2012. No one is safe, and anyone (even if they have been there from the very start) could exit Dick Wolf’s Chicago franchise at any time.

Following the end of the 2023 Writers Guild of America (WGA) and Screen Actors Guild-American Federation of Television and Radio Artists (SAG-AFTRA) strikes, production has resumed on every One Chicago show. Chicago Fire, Chicago PD, and Chicago Med are all set to premiere their new seasons on January 17, 2024. While fans will finally get answers to questions from the previous finales, they will also have to say goodbye (and hello) to many beloved characters.

5Nick Gehlfuss

Will Halstead in Chicago Med

Nick Gehlfuss surprised everyone when his character, Will Halstead, quit his job at Gaffney Chicago Medical Center in the Chicago Med season 8 finale. Gehlfuss had been a series regular in the One Chicago series since the pilot episode in 2015, and he was one of the few remaining original cast members. However, the actor decided to exit the show after appearing in 157 episodes, so Halstead will not be returning to Chicago Med in season 9 in 2024.

Halstead handed in his letter of resignation to Sharon Goodwin at the end of the season 8 finale because he was determined to take the fall for purposefully sabotaging OR 2.0 during Jack Dayton’s surgery, which let Grace Song off the hook. The doctor felt okay about taking the blame because he had been upset with the direction the hospital had been going in for a while. So, Halstead packed up his things, walked out of the hospital while his former colleagues gave him a round of applause, and hopped on a plane to Seattle, where Halstead reunited with Natalie Manning and her son, Owen.

4Kara Killmer

Sylvie Brett in Chicago Fire

Given how the Chicago Fire season 11 finale concluded, it was not completely surprising to learn that Kara Killmer, who played Sylvie Brett, was leaving the NBC drama series. The previous episode featured Matt Casey unexpectedly proposing to Brett (even though they had previously broken up because of the strain of a long-distance relationship) and ended before the audience could hear her answer. Since Casey still had priorities to attend to in Oregon (and Brett had just adopted a baby), it seemed like the worst time for him to propose. However, Killmer’s exit suggests that Brett agrees to marry Casey.

Killmer announced she would leave Chicago Fire in 2024 after being a series regular for nine seasons. Details surrounding her character’s departure are unknown (even the episode that will serve as her swan song). But it would make sense if the season 11 finale cliffhanger related to Brett deciding to leave Firehouse 51. She likely won’t die, given her new status as a mother (and possible fiancée), but only time will reveal the explanation behind Brett’s exit.