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 Abraham Benrubi Guest Star Lucy Liu Mei-Sun Leow Guest Star Nicole Nagel Hulda Guest Star John Finnegan Mitchell Guest Star Ron Eldard Guest Star Joe Costanza Ed Menke Guest Star Laura Innes Dr. Kerry Weaver Guest Star Kathleen Wilhoite Guest Star Vanessa Marquez Nurse Wendy Goldman Guest Star Yvette Freeman Nurse Haleh Adams Guest Star David Spielberg Dr. Neil Bernstein Guest Star Deezer D Nurse Malik McGrath Guest Star Carlos Gomez Paramedic Raul Melendez Guest Star Michael Crichton Executive Producer John Wells Executive Producer