Anthony Edwards Dr. Mark Greene Actor Eriq La Salle Dr. Peter Benton 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 Cyril O'Reilly Prisoner Mike Kinney Guest Star Christina Hendricks Joyce Westlake Guest Star Matthew Settle Brian Westlake Guest Star Lisa Vidal Sandy Lopez Guest Star Mary McDonnell Eleanor Carter Guest Star Michael Gross John 'Jack' Carter Jr. Guest Star Efrain Figueroa Julio Echevarria Guest Star Hallee Hirsh Guest Star Ed Lauter Fire Captain Dannaker Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Laura Cerón Nurse Chuny Marquez Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer