Guest Stars Randy Flagler as Firefighter Harold Capp Steven R. McQueen as Jimmy Borrelli Nick Gehlfuss as Dr. Will Halstead Brian Geraghty as Sean Roman Brian White as Captain Dallas Patterson Oliver Platt as Dr. Daniel Charles Fredric Lehne as Deputy District Chief Ray Riddle Rachel Nichols as Jamie Killian Andy Ahrens as Firefighter Danny Borrelli Co Starring Anthony Ferraris as Squad 3 Driver Tony Ferraris DuShon Brown as Connie Jennifer Weigel as Melissa Brosh-McKenna Mindy Bell as Suzie Wilder Mark Hengst as Roger Maddox Stephen Eugene Walker as Commander Nick Duffy Leah Bostic as Resident Erin Noel Grennan as Neonatal Nurse Campbell Lyric Ross as Girl Charin Alvarez as Tricia Cam Dupre as Damon Joe Bianco as Sketchy Guy Jose Santiago as Steve D'Wayne Taylor as Dad LaQuis Harkins as Mom Michael Kingston as Building Engineer Frederic Stone as Elevator Engineer Regie Cashaw as Mr. Travers Cathleen Coyle as Waitress Ben Hertel as Stabbing Victim Uncredited Anne Lockhart voices Dispatcher