Matt Czuchry Dr. Conrad Hawkins Actor Bruce Greenwood Dr. Randolph Bell Actor Manish Dayal Dr. Devon Pravesh Actor Malcolm-Jamal Warner Dr. AJ Austin Actor Jane Leeves Dr. Kit Voss Actor Jessica Lucas Billie Sutton Actor Anuja Joshi Dr. Leela Devi Actor Denitra Isler Nurse Ellen Hundley Guest Star Kaley Ronayne Dr. Kincaid Sullivan Guest Star Summer Selby Carol Austin Guest Star Alan Aisenberg Zach Brooks Guest Star David A. MacDonald Agent Todd Baker Guest Star Jeena Yi Dr. Jayci Lee Guest Star Shirley Chen Alicia Zhou Guest Star Tiffany Kyle Phoebe Moffit Guest Star Michael Tow Nathan Zhou Guest Star Gary Perez Bruno Camacho Guest Star Elaine Del Valle Miranda Camacho Guest Star Derek Russo Taron Drakos Guest Star Tsi Chin Li-McCall Eileen Zhou Guest Star Christopher Fisher Fire Chief Eli Joe Guest Star Shanessa Sweeney Janaya Purcell Guest Star Omer Mughal EMT Alex Guest Star Bryan Gael Guzman Man (Maximo) Camacho Guest Star Tina McCoy Mitchell EMT Serena Guest Star Jennica Hill Circulating Nurse Diana Guest Star Antoine Fuqua Executive Producer Amy Holden Jones Executive Producer David Boorstein Executive Producer Oliver Obst Executive Producer Phillip Noyce Executive Producer Todd Harthan Executive Producer Rob Corn Executive Producer