Guest Stars Allison Wilson-Forbes as Nurse Alice Jess Salgueiro as Nurse Serena Cabrera Pauline Wong as Nurse Pauline Nicole Underhay as Kristine Fields Shaun Benson as Lane Berkley Genelle Williams as Shelby Hart Raven Dauda as Nurse Raven Michael Kaplan as John Doe / Bomber Michael Rhoades as Detective Lozio John Bregar as Adam Hart Jeff Clarke as Mr. Calhar Natalia Jonas as OR Nurse Nathan Hoppe as Angry Man #3 Louis Adams as Angry Man #1 Shakura S'Aida as Cora Boullot Victor Chiu as Injured Person #1 Peter Bailey as Angry Man #2 Tye Evans as Injured Runner #3 Brandon Rollo as Injured Runner #2 Lisa Rose Snow as Reporter Penny Eizenga as Injured Person #2 Diana Cofini as Injured Runner #1