Severide investigates an old house fire from 10 years back in which Kidd had responded. Carver and Violet search for a mystery medic who abandoned a victim. Novak looks for a roommate.

Cast: Taylor Kinney, David Eigenberg, Joe Miñoso, Christian Stolte, Miranda Rae Mayo, Daniel Kyri, Hanako Greensmith, Jocelyn Hudon, Jake Lockett, Dermot Mulroney