Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Eriq La Salle Dr. Peter Benton Actor Noah Wyle Dr. John Carter Actor Julianna Margulies Head Nurse Carol Hathaway Actor Gloria Reuben Jeanie Boulet Actor Laura Innes Dr. Kerry Weaver Actor Alex Kingston Dr. Elizabeth Corday Actor Maria Bello Dr. Anna Del Amico Actor Mariska Hargitay Guest Star Clancy Brown Guest Star Abraham Benrubi Guest Star Lily Knight Mary Cochran Guest Star Rebecca Tilney Judy Cochran Guest Star Jonathan Scarfe Chase Carter Guest Star George Eads Paramedic Greg Powell Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Deezer D Nurse Malik McGrath Guest Star Gedde Watanabe Nurse Yosh Takata Guest Star Emily Wagner Doris Pickman Guest Star Montae Russell Dwight Zadro Guest Star Brian Lester Brian Dumar Guest Star Michael Crichton Executive Producer John Wells Executive Producer