"Chicago Fire Season 12: Mouch, Gallo's Exit, and Brett's Rollercoaster Future"
The upcoming season 12 premiere of "Chicago Fire" will address the aftermath of Mouch's fate, Gallo's departure, and Herrmann's injury, while introducing new character Derek Gibson. The season will focus on the theme of change as the firehouse copes with departures and new additions, including Violet stepping into a leadership role. Boden will provide stability amidst the turmoil, and there will be a new medic joining the team as well as the possibility of familiar faces returning.