Special Guest Stars Nick Gehlfuss as Dr. Will Halstead Eamonn Walker as Battalion Chief Wallace Boden David Eigenberg as Lieutenant Christopher Herrmann Taylor Kinney as Lieutenant Kelly Severide Kara Killmer as Paramedic Sylvie Brett Christian Stolte as Firefighter Randy "Mouch" McHolland S. Epatha Merkerson as Chief Administrator Sharon Goodwin Jesse Spencer as Matthew Casey Torrey DeVitto as Dr. Natalie Manning Joe Miñoso as Firefighter Joe Cruz Annie Ilonzeh as Paramedic Emily Foster Yaya DaCosta as Nurse April Sexton Dominic Rains as Dr. Crockett Marcel Miranda Rae Mayo as Firefighter Stella Kidd Guest Stars Randy Flagler as Firefighter Harold Capp Kathleen Munroe as Dr. Andrea Danover Kyla Kenedy as Amanda Alberto Rosende as Candidate Blake Gallo Daniel Kyri as Candidate Darren Ritter Aaron Serotsky as Dr. David Seldon Paloma Nozicka as Carrie White Seldon Eileen Galindo as Mama Garcia Co Starring Alejandro Raya as Patrol Officer Caswith Anthony Ferraris as Squad 3 Driver Tony Ferraris Andrea Adams as Patrol Officer Lorena Diaz as Nurse Doris Amanda Marcheschi as Nurse Dina Garston Ricky Bartlett as Security Guard #1 Javier Gutiérrez as Driver Jeremy Shouldis as Dr. Marty Peterson Julian Hester as John Sorenstein Grant Stokes as Board Member #1 Sheri L. Winkelmann as Woman Paul Zinke as Jordan Brett Lee as Shipp Ben Wilson as Officer Murphy Louise Lamson as Dr. Heather Holcomb Scott Morton as Board Member #3 Christopher R. Ellis as FTO