Guest Stars Randy Flagler as Firefighter Harold Capp Robyn Coffin as Cindy Herrmann Amy Morton as Desk Sergeant Trudy Platt Marina Squerciati as Officer Kim Burgess Nick Gehlfuss as Dr. Will Halstead Patrick John Flueger as Officer Adam Ruzek Yaya DaCosta as Nurse April Sexton Gordon Clapp as Chaplain Orlovsky Brian Tee as Dr. Ethan Choi Colin Donnell as Dr. Connor Rhodes Co Starring Anthony Ferraris as Squad 3 Driver Tony Ferraris Lorena Diaz as Nurse Doris Alex Weisman as Paramedic Allen Chout Marcus Hendricks as Police Officer Ralph Rodriguez as Freddie Clemente Killian Hughes as Alex Amanda Marcheschi as Nurse Dina Garston Ron Stevens, Sr. as Spider Noel Jusino as Wool Cap Michael David Hammond as Big Boy Crystal John-DeMey as Resident Paul Fagen as Oscar T. Murph as Cabbie Uncredited Anne Lockhart voices Dispatcher