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 Richard Short Drake Guest Star Laura Leighton Sonya Guest Star Gatlin Kate James Delia Guest Star Jordan Belfi Andrew Guest Star Marta Méndez Cross Gabriella Guest Star Linda Purl Madeline Guest Star Levi Fiehler Jake Guest Star Shanti Lowry Tiffany Guest Star Laya DeLeon Hayes Emily Campbell Guest Star Zac Badasci Dash Guest Star Jessica Leigh Gonzales Paramedic Guest Star Braden Lynch Medavac Medic Guest Star George Lako Medavac 2 Guest Star Joseph Piccuirro Medic 1 Guest Star Braylon Owens Dominic Guest Star Dominic Owens Dominic Guest Star Michael Blum Morgan Guest Star Michael Seitzman Executive Producer David Semel Executive Producer Ryan McGarry Executive Producer Marti Noxon Executive Producer Linda Goldstein Knowlton Executive Producer Barbie Kligman Writer Jennifer Chambers Lynch Director