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 Tyler Perez Diego Avila Guest Star Angela Relucio Nurse Risa Park Guest Star Chaley Rose Pepper Russo Guest Star Troy Winbush Principal Grant Guest Star Tommy Savas Javi Gomez Guest Star John Garet Stoker Judd Guest Star Chris Coy Larry Guest Star David Starzyk Dave Guest Star Kristina Emerson Shelly Guest Star Clare Frazier Mika Guest Star Michael Seitzman Executive Producer, Writer David Semel Executive Producer Ryan McGarry Executive Producer Marti Noxon Executive Producer Linda Goldstein Knowlton Executive Producer Rob Bowman Director