Guest Stars Tasso Feldman as Dr. Irving Feldman Jessica Miesel as Nurse Jessica Moore Michael Hogan as Dr. Albert Nolan Patrick R. Walker as Micah Stevens Tate Ellington as Jason Thoms Emily Tosta as Joplin Bird Cyrina Fiallo as Rachel Bird Co Starring Denitra Isler as Nurse Ellen Hundley Vince Foster as Dr. Paul Chu Ethan Corn as Paramedic John Akerman Ann Marie Gideon as Nurse Sylvie Pund Kelly Tippens as Nurse Linda Smith Mary Shaw as Dr. Mary Bolton Nicole Sellars as News Anchor Connie Klein Viviana Chavez as Nurse Reena Reddy Andi Matheny as Dr. Kelly Whitley Jason Turner as Dr. Dale Simich Andrew Hunter Murray as Radiologist Grayson Dees Rico Paris as Medical Assistant Enrique Diaz Kendrick Cross as Chief Medical Officer Ben Kothari John Forbes as Dr. Mark Wilson Melanie J. Newby as Nurse Lora Day Justin Calalay as Paramedic Fred Tanner Adrienne Whitney Papp as Melanie Thoms Devon Hales as Lisa Logan Ian Covell as Charles Simm