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 Abraham Benrubi Jerry Markovic Guest Star Amy Aquino Dr. Janet Coburn Guest Star Zachary Browne Jake Leeds Guest Star Khandi Alexander Jackie Robbins Guest Star Gloria Reuben Jeanie Boulet Guest Star Beah Richards Mae Benton Guest Star Ming-Na Wen Jing-Mei Chen Guest Star Kathleen Wilhoite Chloe Lewis Guest Star Lisa Zane Diane Leeds Guest Star Peggy Pope Mrs. Gainsley Guest Star Isabella Martinez Wall Anita Salizar Guest Star Ashley Malinger Janette Ryan Guest Star Michael Crichton Executive Producer John Wells Executive Producer Christopher Chulack Producer Paul Manning Producer