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 Andy Favreau Charlie Guest Star Jack Conley Jonathan Guest Star O'Neill Monahan Doug Guest Star Alex Lange Max Edwards Guest Star Patrick Fabian Owen Guest Star Robyn Lively Pamela Guest Star Antonio Fargas Harold Guest Star Millicent Martin Marjorie Guest Star Shannon Kane Felicia Humphries Guest Star Patricia Belcher Gloria Guest Star Laya DeLeon Hayes Emily Campbell Guest Star Kylie Rogers Sally Guest Star Ramona DuBarry Linda Kerman Guest Star Emily Berry Phoebe Guest Star Aris Mendoza Medic Guest Star Matthew O'Connor Police Boat Pilot Guest Star Jim Titus Paramedic Guest Star Michael Seitzman Executive Producer David Semel Executive Producer Ryan McGarry Executive Producer Marti Noxon Executive Producer Linda Goldstein Knowlton Executive Producer Rebecca Cutter Writer Lin Oeding Director