Although there were concerns that Taylor Kinney’s time on Chicago Fire was coming to an end, Kelly Severide’s subtle return to his prime form in season 13 suggests otherwise. Kinney has starred as Severide since the very beginning of the NBC procedural drama. As a lieutenant at Firehouse 51 and the officer in charge of Squad 3, Severide has always been an important character in the series. So, when he began to lose his classic self in recent Chicago Fire seasons, the One Chicago TV show started to go downhill, which is why Severide’s role in season 13 is so exciting.

https://screenrant.com/chicago-fire-season-13-classic-kelly-severide-return/