In the final episode of Season 10, Matt Casey returns to town for the wedding, and in the Season 11 premiere, he returns to Oregon. At the same time, Sylvie Brett crosses paths with an ex-boyfriend, which causes her to reflect on her current relationship. Coming to a personal conclusion, Brett calls Casey to explain that things aren’t working out between them right now, but mentions that they might be a couple again one day.
In an interview with TVLine, co-showrunner Andrea Newman was asked why Brett and Casey broke up and the reasons behind this particular decision. She explained, “So, she made a lot of decisions based on those relationships and became a stronger and more independent woman. So as much as she loves Casey, and it’s undeniable, she is now making decisions that are for her own future and for her life with this paramedical cause that is truly near and dear to her.” Newman continued, “We’re going to put it on the map and you’ll see her grow a lot and you’ll hear her talk about it. So it’s very fun to watch. , independent physician. When she arrived, she needed to grow up a little, and she did. It’s interesting to watch.”
Co-showrunner Derek Haas added that the door is still open for the relationship to continue later, and that we may not have seen Bretsy for the last time. Either way, this change in dynamic represents another chapter in Brett and Casey’s story, and hopefully fans will see their love rekindled in the next episode.