Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Sherry Stringfield Dr. Susan Lewis 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 Carlos Gomez Paramedic Raul Melendez Guest Star Phil Leeds Husband Guest Star Lucy Liu Mei-Sun Leow Guest Star Ellen Crawford Nurse Lydia Wright Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Lily Mariye Nurse Lily Jarvik Guest Star Shay Astar Amy Thompson Guest Star Dennis Burkley Tom Perry Guest Star Ron Eldard Guest Star Laura Innes Dr. Kerry Weaver Guest Star Celia Kushner Elderly Woman Guest Star Michael Crichton Executive Producer John Wells Executive Producer