Marcia Gay Harden Dr. Leanne Rorish Actor Bonnie Somerville Christa Lorenson Actor Raza Jaffrey Dr. Neal Hudson Actor Luis Guzmán Jesse Sallander Actor Melanie Chandra Malaya Pineda Actor Harry Ford Angus Leighton Actor Benjamin Hollingsworth Mario Savetti Actor William Allen Young Dr. Rollie Guthrie Actor Kevin Dunn Dr. Taylor Guest Star Emily Nelson Hannah Reynolds Guest Star Angela Relucio Risa Park Guest Star Ellia English Isabel Mendez Guest Star Edwin Kho Medic 1 Guest Star Dana Davis Laura Guest Star Regan Burns Jake Willis Guest Star T.J. Linnard Brian Wellborn Guest Star Rebecca Lowman Becca Guest Star Devin Dileo Tara Guest Star K Callan Ruth Guest Star Marlene Forte Lucia Guest Star JD Cullum Edward Darius Guest Star Charles Carpenter Stan Rocksickler Guest Star Landon Ashworth Dana Garrett Guest Star Mikaela Brown Medic 2 Guest Star Theo Breaux Medic 3 Guest Star Michael Seitzman Executive Producer, Writer David Semel Executive Producer Ryan McGarry Executive Producer Marti Noxon Executive Producer Linda Goldstein Knowlton Executive Producer Christopher Misiano Director