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 Kathleen Wilhoite Guest Star Christine Harnos Guest Star Ron Eldard Guest Star Scott Michael Campbell Guest Star Laura Innes Dr. Kerry Weaver Guest Star Romy Rosemont Joanne Barris Guest Star Lynn Milgrim Ms. Crandell, Blind Woman Guest Star Al Ruscio Mr. Dellanova Guest Star Marg Helgenberger Karen Hines Guest Star Mary Mara Loretta Sweet Guest Star Michael Crichton Executive Producer John Wells Executive Producer