Killmer has played Sylvie Brett on the NBC show since 2014. A brand new episode airs Wednesday, March 10 at 9 p.m. ET/PT on NBC. ET exclusively debuts a first look from Wednesday's two-hour event ...

Since joining "Chicago Fire" in Season 3, Kara Killmer's Sylvie Brett has become ... but the actor has indicated that he isn't making a full return anytime soon. Some fans think Brett's big ...