Marcia Gay Harden Dr. Leanne Rorish Actor Boris Kodjoe Dr. Will Campbell Actor Harry Ford Dr. Angus Leighton Actor Benjamin Hollingsworth Dr. Mario Savetti Actor William Allen Young Dr. Rollie Guthrie Actor Luis Guzmán Jesse Sallander Actor Rob Lowe Col. Ethan Willis Actor Emily Tyra Dr. Noa Kean Actor Noah Gray-Cabey Dr. Elliot Dixon Actor Emily Alyn Lind Ariel Actor Moon Bloodgood Rox Valenzuela Actor Julitta Dee Scheel Ruby Harris Guest Star Matthew Yang King Pilot Randy Woodman Guest Star Deep Rai Clerk Guest Star Christina Haag Anesthesiologist Guest Star Sarah Brown Elizabeth Harris Guest Star Ronnie Gene Blevins Joe Lawson Guest Star Spencer Garrett Marshall Barnes Guest Star Jenna Willis Maya Carter Guest Star Delpaneaux Wills Nurse Guest Star Yvonne Senat Jones Surgical Nurse Guest Star Samantha Harris On Screen Reporter Guest Star Leonard Concepción Pilot Guest Star Michael Seitzman Executive Producer David Semel Executive Producer Ryan McGarry Executive Producer Marti Noxon Executive Producer Linda Goldstein Knowlton Executive Producer Mike Weiss Writer Randy Zisk Director