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 Abraham Benrubi Jerry Markovic Guest Star Lili Flanders Ms. Brown Guest Star William H. Macy Guest Star Christine Harnos Guest Star Ving Rhames Walter Robbins Guest Star Beah Richards Mae Benton Guest Star CCH Pounder Dr. Angela Hicks Guest Star Lisa Zane Diane Leeds Guest Star Robert Carradine John Koch Guest Star Sanford Meisner Joseph Klein Guest Star Julie Fulton Swanson Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Nancy Youngblut Sarah Howe Guest Star Milana Vayntrub Tatiana Guest Star Danny Dayton Art Guest Star