Don Kilbourne is a Deputy District Chief with the Chicago Fire Department. He is portrayed by Jack Conley. Kilbourne is known to dislike Jason Pelham due to forcing his friend, Will Stafford, into retirement or face jail time. He hated it when Boden put him on full time at Firehouse 51 and when someone under his command got hurt on a job, he reached out to the firefighter, Sara McBride, and goaded her into fabricating a story to put Pelham at fault. Boden soon learned that Kilbourne spoke to McBride before the grievance was filed and Stafford pointed out that this wasn't the first time he has done it. DC Gloria Hill immediately took action after McBride recanted her grievance and placed Kilbourne on Administrative Leave pending an investigation.