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 Lisa Nicole Carson Guest Star David Denman Jeremy Willia, Angel Guest Star Trace Vilar Doris Guest Star Merrin Dungey Daphina Guest Star Joel de la Fuente Med Student Ivan Fu Guest Star Justin Henry Med Student James Sasser Guest Star Nicholas Sadler Ricky Melgato Guest Star Christine Harnos Jennifer Simon Guest Star Lillian Hurst Mrs. Landeta Guest Star Peter Allas Arresting Officer Guest Star Michael Crichton Executive Producer John Wells Executive Producer