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 Sharif Atkins Actor Mekhi Phifer Dr. Gregory Pratt Actor Bruce Weitz Alderman John Bright Guest Star Ed Asner Dr. James McNulty Guest Star James Colby Tom Callahan Guest Star Marcello Thedford Leon Guest Star Liz Torres Sarah Wilson Guest Star Jeannetta Arnette Mrs. Hawkes Guest Star Abraham Benrubi Jerry Markovic Guest Star Erica Gimpel Adele Newman Guest Star Joe O'Connor Mr. Scott Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer