Chicago Fire Season 11 Finale: Shocking Twists and Resolutions.
During the Season 11 finale of "Chicago Fire," Mouch, played by Christian Stolte, was hit by shrapnel during a call with a live shooter. While the firehouse was initially alerted that he was recovering, in the final moments of the episode, Mouch flat-lined. The finale also marked the final appearance of showrunner and co-creator Derek Haas, and the departure of original "Chicago Med" star Nick Gehlfuss.