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 John Randolph Mr. Franks Guest Star Douglas Rowe Dr. Arndt Guest Star Liz Vassey Liz Guest Star Ed Cambridge Victor Guest Star John Terry Dr. David 'Div' Cvetic Guest Star Glenn Plummer Timmy Rawlins Guest Star Christine Harnos Guest Star Tobin Bell Hospital Administrator Guest Star Abraham Benrubi Jerry Markovic Guest Star Scott Jaeck Dr. Steven Flint Guest Star