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 Alan Rosenberg Samuel Gasner Guest Star John Terry Dr. David 'Div' Cvetic Guest Star Kimberly Scott Sandy's Mother Guest Star Liz Vassey Liz Guest Star Christine Harnos Guest Star Abraham Benrubi Jerry Markovic Guest Star Sam Anderson Dr. Jack Kayson Guest Star Cathy Lind Hayes Elaine Gasner Guest Star Scott Jaeck Dr. Steven Flint Guest Star Ellen Crawford Nurse Lydia Wright Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Vanessa Marquez Nurse Wendy Goldman Guest Star John LaMotta Ivan Gregor Guest Star