Another 'Chicago Fire' Star Officially Exits Season 15

Image via NBC Published Jul 31, 2026, 2:54 PM EDT Ryan O'Rourke is a Senior News Writer at Collider with a specific interest in all things adult animation, video game adaptations, and the work of Mike Flanagan. He is also an experienced baseball writer with over six years of articles between multiple outlets, most notably FanSided's CubbiesCrib. Whether it's taking in a baseball game, a new season of Futurama or Castlevania: Nocturne, or playing the latest From Software title, he is always finding ways to show his fandom. When it comes to gaming and anything that takes inspiration from it, he is deeply opinionated on what's going on. Outside of entertainment, he's a graduate of Eureka College with a Bachelor's in Communication where he honed his craft as a writer. Between The IV Leader at Illinois Valley Community College and The Pegasus at Eureka, he spent the majority of his college career publishing articles on everything from politics to campus happenings and, of course, entertainment for the student body. Those principles he learned covering the 2020 election, Palestine, and so much more are brought here to Collider, where he has gleefully written on everything from the SAG-AFTRA and WGA strikes to Nathan Lane baby-birding sewer boys. Sign in to your Collider account This article covers a developing story. Continue to check back with us as we will be adding more information as it becomes available.On network television, the One Chicago universe still represents one of the most ambitious undertakings. Formulated by the powerhouse trio of Derek Haas, Michael Brandt, and Dick Wolf under the Law & Order titan's Wolf Productions, the interconnected trio of shows has remained among NBC's most consistent winners year after year, even helping the network to become the most-watched among its peers on Wednesday nights. The enduring success made renewing all three an easy call to make this spring, with the franchise locked in to return to screens nationwide on October 7. However, there will be a few noticeable changes to the franchise's next chapter. Firehouse 51 is about to lose another of its veteran members. Earlier this week, ahead of the premiere of Season 15 on NBC, Chicago Fire bade farewell to Joe Miñoso, who had been with the procedural since 2012 and had starred in 290 episodes. Now, Dermot Mulroney will be joining him. Deadline reported today that the actor, who led the series as Chief Dom Pascal, will wrap up his storyline and depart early on in the upcoming season. Release Date October 10, 2012 Network NBC Showrunner Andrea Newman Cast Taylor Kinney Kelly Severide David Eigenberg Christopher Herrmann Directors Michael Brandt Writers Michael Brandt Creator(s) Michael Brandt, Derek Haas