So, they decided not to wait four months to get married, but to do it the following week, which in TV time is this week in the “The Magnificent City of Chicago” episode and the season 10 finale. And, as promised, Firehouse 51 welcomes back Matthew Casey (Jesse Spencer) for the occasion as he will serve as best man. He returns with Sylvie Brett (Kara Killmer), who has been in Portland visiting him. “This episode, I feel that people are going to be frustrated, delighted, verklempt, and touched,” Killmer says in this exclusive video. “There’s going to be so much anticipation that led up to this episode for 10 years, especially for Kelly Severide. Let’s take that guy off the market! You know what I’m saying? It’s been 10 years. He’s been fighting it for so long. He finally bagged himself a Grade A gal and he looks so good in his tux, let’s not waste it. All of the ladies in America are going to cry. He’s taken ladies. It’s happening.” Also on Wednesday night’s episode, Emma Jacobs’ (Caitlin Carver) plans to replace Violet (Hanako Greensmith) come to a shocking end. Can we say hallelujah?! The Chicago Fire season finale airs Wednesday, May 25 at 9 p.m. ET/PT on NBC. Next, She’s Back! Chicago Fire‘s Miranda Rae Mayo on the Return of Stella Kidd