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 Robert Costanzo Pernicious Anemia Man Guest Star June Squibb Social Security Daughter Guest Star Laura Cerón Guest Star Troy Evans Frank Martin Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Montae Russell Dwight Zadro Guest Star Gedde Watanabe Nurse Yosh Takata Guest Star Richard Biggs Bruce Storchester Guest Star Kevin Brief Walter Brosnich Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer