Special Guest Stars Nick Gehlfuss as Dr. Will Halstead Eamonn Walker as Battalion Chief Wallace Boden Taylor Kinney as Lieutenant Kelly Severide Brian Tee as Dr. Ethan Choi S. Epatha Merkerson as Chief Administrator Sharon Goodwin Guest Stars Annie Ilonzeh as Paramedic Emily Foster Rachel Cerda as FBI Special Agent Julia Cortes David Zayas as Carlos Mendoza Andrew Perez as Juan Mendoza Co Starring Celeste Cooper as Medical Examiner Cooper Sean Michael Sullivan as Bomb Squad Tech Charles Lang Julian Griffith as Patrol Officer Geneva Maccarone as Jane Doe Melissa DuPrey as Carr Steve Haggard as Ward Fernando Del Cuadro as Daniel Mendoza