Chicago Fire kicked off the One Chicago franchise in 2012, and since then, NBC has
aired three spinoffs, but they should add another one to the list revolving around Matt
Casey (Jesse Spencer) and Sylvie Brett (Kara Killmer). Spencer was a part of the
original main cast of Chicago Fire in 2012 and was a series regular until he exited the procedural drama in season 10. Meanwhile, Killmer joined the show during the season 3 premiere and was a main cast member until she left in season 12. Given how their stories ended, a spinoff starring Casey and Brett is feasible. Casey and Brett rode off into the sunset at the end of Chicago Fire season 12, episode 6. The two began dating in season 9 but broke up when Casey moved to Portland, Oregon.
Their relationship wasn’t built to withstand the long distance. Consequently, Casey and Brett went their separate ways, but it soon became clear that, despite their breakup, the couple was meant to be together. The perfect opportunity to make Casey and Brett endgame was when Killmer announced she was leaving Chicago Fire in season 12, opening the door for Casey and Brett to get married and live together in Oregon. Kara Killmer’s Chicago Fire exit was ultimately bittersweet as it meant Casey and Brett could finally be together but at the cost of losing the two characters on the show.
As separate characters, Casey and Brett were both beloved by fans. However, together, many viewers enjoyed their relationship and were rooting for it before they officially started dating. It would be quite disappointing if Chicago Fire fans never got to see Casey and Brett again, and a spinoff could change that. A Brett and Casey Chicago Fire spinoff would be quite exciting, especially after their wedding in season 12. The fan-favorite characters would be back on the small screen as husband and wife, which should entice many. Plus, given that the theoretical Chicago Fire spinoff would revolve solely around Brett and Casey, the show could spend much more time on their story and developing their relationship.
