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 Andrew J. Ferchland Ozzie Sheff Guest Star Annabella Price Mrs. Sheff Guest Star Patricia Healy Priscilla Guest Star Tyra Ferrell Dr. Sarah Langworthy Guest Star Ving Rhames Walter Robbins Guest Star Abraham Benrubi Jerry Markovic Guest Star Rick Rossovich Dr. John 'Tag' Taglieri Guest Star Ken Lerner Harry Stopak Guest Star Betty Carvalho Vilma Zevallo Guest Star Elaine Kagan Mrs. Shearer Guest Star