Anthony Edwards Dr. Mark Greene Actor Noah Wyle Dr. John Carter Actor Laura Innes Dr. Kerry Weaver Actor Alex Kingston Dr. Elizabeth Corday Actor Goran Visnjic Dr. Luka Kovac Actor Maura Tierney Abby Lockhart Actor Paul McCrane Robert Romano Actor Ming-Na Wen Actor Sherry Stringfield Dr. Susan Lewis Actor Eriq La Salle Dr. Peter Benton Actor Paul Benjamin Al Ervin Guest Star Kay Panabaker Melissa Rue Guest Star Sharif Atkins Guest Star Chris Burke George Guest Star Ellen Crawford Nurse Lydia Wright Guest Star Deezer D Nurse Malik McGrath Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Lily Mariye Nurse Lily Jarvik Guest Star Montae Russell Dwight Zadro Guest Star Troy Evans Frank Martin Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer