Chicago Fire‘s 12th season, which is now airing, has seen the return of Taylor Kinney,

who’s portrayed Lieutenant Kelly Severide since the show’s 2012 premiere, and the exit

of Kara Killmer, who joined the procedural as paramedic Sylvie Brett in its third season.

In other words, it’s been an emotional rollercoaster. Here are all the must-have details about Chicago Fire Season 12, including cast updates and episode descriptions.

Yes. NBC renewed Chicago Fire in April 2023 and Season 12 was expected to air in September, but NBC delayed the show because of the WGA and SAG-AFTRA strikes, which have since both ended. The 12th season is currently airing.

What was the release date for Chicago Fire Season 12?

Chicago Fire Season 12 premiered Wednesday, Jan. 17 at 9 p.m. ET on NBCSpoilers ahead! The Chicago Fire Season 11 finale was full of cliffhangers, making the premiere of Season 12 a hotly anticipated one. Lieutenant Matthew Casey (Jesse Spencer) returned to propose to paramedic Sylvie Brett (Kara Killmer), and we don’t know yet whether she accepted (viewers also learned that Sylvie was adopting a baby girl). Meanwhile, Mouch was injured by shrapnel and taken to the hospital, where he was at first ruled stable, but then started bleeding out and coding. Kara Killmer, who stars as Sylvie Brett, left the show during its current 12th season. Her character’s arc ended in episode 6, with her wedding to Matt Casey (Jesse Spencer).“It is more sweet than bitter,” Killmer told Parade of her exit. “I am selfishly delighted over the fact that Sylvie’s arc as a character started when she was left at the altar by her high school boyfriend, and she comes to Chicago to start over because she’s a jilted bride. And then she ends up across the aisle from Matt Casey, the most eligible and honorable bachelor in all of Chicago and Portland.”After four seasons as Blake Gallo, Rosende is saying goodbye to Chicago Fire. He made one last appearance in the Season 12 premiere.