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 Christine Harnos Guest Star Abraham Benrubi Jerry Markovic Guest Star Tyra Ferrell Dr. Sarah Langworthy Guest Star Brigid Brannagh Jamie Hendricks Guest Star Ving Rhames Walter Robbins Guest Star Beah Richards Mae Benton Guest Star John Terry Dr. David 'Div' Cvetic Guest Star Christian Coleman Mookie 'Slice' James Guest Star Michael Manasseri Michael Kenny Guest Star