Ryan Eggold Dr. Max Goodwin Actor Freema Agyeman Dr. Helen Sharpe Actor Janet Montgomery Dr. Lauren Bloom Actor Jocko Sims Dr. Floyd Reynolds Actor Tyler Labine Dr. Iggy Frome Actor Nora Clow Luna Guest Star Opal Clow Luna Guest Star Kerry Flanagan Marsha Guest Star Alan Cox Painter (aka Lyle Redmond) Guest Star Claire Karpen Dr. Michele Goldman OB, GYN Guest Star Omar Ghonim Simon Guest Star Andrew Polk Dr. Melvin Skein Guest Star Dorcas Sowunmi Dr. Iyawa Metzger Guest Star Megan Byrne Gladys Guest Star Shiva Kalaiselvan ED Resident Leyla Shinwari Guest Star Chloe Freeman ED Resident Pavan Carey Guest Star Amaia Arana ED Resident Roxana Zamaya Guest Star Matthew Jeffers ED Chief Resident Dr. Mark Walsh Guest Star Andre Blake Dr. Claude Baptiste Guest Star Jennifer Betit Yen OR Nurse Aimee Kamoe Guest Star Anna Suzuki Sandra Fall Guest Star Greta Quispe ICU Nurse Sabrina Zambrano Guest Star Jenna Hellmuth Battalion Fire Chief Franco Guest Star Edward Heegan Fireman Guest Star Eric Robinson Jr. Brandon Dover Guest Star Teresa Patel Paramedic Harvell Guest Star Olivia Khoshatefeh Dr. Yasmin Turan Guest Star Frances Turner Dr. Lyn Malvo Guest Star Patrena Murray Corrections Ward Guard Guest Star Isabel Keating Mary Wheeler Guest Star Sandra Mae Frank Dr. Elizabeth Wilder Guest Star Conner Marx Ben Guest Star Michael Basile Paramedic Moreland Guest Star Pearl Sun Head of Security Theresa Colgan Guest Star David Schulner Executive Producer, Writer Peter Horton Executive Producer Michael Slovis Executive Producer, Director David Foster Executive Producer Aaron Ginsburg Executive Producer Shaun Cassidy Executive Producer