Marcia Gay Harden Dr. Leanne Rorish Actor Boris Kodjoe Dr. Will Campbell Actor Melanie Chandra Dr. Malaya Pineda Actor Harry Ford Dr. Angus Leighton Actor Benjamin Hollingsworth Dr. Mario Savetti Actor Jillian Murray Dr. Heather Pinkney Actor William Allen Young Dr. Rollie Guthrie Actor Luis Guzmán Jesse Sallander Actor Rob Lowe Col. Ethan Willis Actor Noah Gray-Cabey Dr. Elliot Dixon Guest Star Emily Tyra Dr. Noa Kean Guest Star Cress Williams Cole Guthrie Guest Star Angela Relucio Risa Park Guest Star Abigail Klein Nurse Eloise Guest Star Jay Harrington Dr. Leo Fields Guest Star William Stanford Davis Emmanuel Guest Star Britt Adams Lola Guest Star Rita Khori Rima Guest Star Eyal Podell Devon Guest Star Tyler Young Jared Guest Star Tracey Heggins Tracy Guest Star Reece Cody Jack Harris Guest Star Nawal Bengholam Interpreter Guest Star Jim Titus Paramedic 1 Guest Star Terrence Edwards Paramedic 3 Guest Star Christopher Darga Larry Guest Star Kane Lieu Paramedic 4 Guest Star Brandon Brown First-Year Guthrie Guest Star Aiden Berryman Child Guthrie Guest Star Lance Irwin Fire Chief Guest Star Michael Seitzman Executive Producer, Writer David Semel Executive Producer Ryan McGarry Executive Producer Marti Noxon Executive Producer Linda Goldstein Knowlton Executive Producer David Von Ancken Director