Guest Stars Jeff Hephner as Jeff Clarke Treat Williams as Benny Severide Michelle Forbes as Gail McLeod Chaon Cross as Heather Darden Brittany Curran as Katie Nolan Larisa Polonsky as Zoja Vedette Lim as Devon Linda Powell as Ingrid Mills Dylan Baker as Doctor David Arata Co Starring Randy Flagler as Firefighter Harold Capp DuShon Brown as Connie Robyn Coffin as Cindy Herrmann John Babbo as Griffin Darden Charlie Babbo as Ben Darden John Gawlik as Officer Banks Victoria Blade as Lisa Rene L. Moreno as Warehouse Worker Anu Bhatt as Tech Ben Marten as Westin Derek Gaspar as Marcus Lisa Murray as Woman Maggie McNabb as Anna Mark Collins as Accountant Uncredited Anne Lockhart voices Dispatcher