Political Analyst -- Host of "Hardball" on MSNBC - Chris has worked for several Democratic politicians. He was a presidential speechwriter for four years during the administration of Jimmy Carter. He served as a top aide to long-time Speaker of the House of Representatives Tip O'Neill for six years. He worked in the U.S. Senate for five years on the staffs of Senators Frank Moss and Edmund Muskie before running for U. S. House of Representatives from Pennsylvania.  Matthews worked as a print journalist for 15 years, spending 13 years as Washington Bureau Chief for The San Francisco Examiner (1987 – 2000), and two years as a nationally syndicated columnist for The San Francisco Chronicle.

    Political Analyst -- Former Florida Congressman Joe Scarborough hosts “Scarborough Country,” a nightly newscast on MSNBC. He also provides on air political commentary for the network, as well as CNBC and NBC’s “Today Show.” During his tenure, Scarborough served on the Armed Services Committee, the Judiciary Committee, Government Reform and Oversight and the Education Committee. In 1998, he was named Chairman of the Civil Service Committee and while on that committee, Scarborough drafted a bill on Long Term Care, which President Clinton called “landmark legislation." After leaving office, he was named by President Bush as a member of the President’s Council on the 21st Century Workforce, where he served with Labor Secretary Chao, national labor officials, and business leaders.

    Marriage and Family Therapist- Tara Fields, PhD, is a licensed marriage and family therapist with 19 years of experience in the "family systems" approach to dealing with addiction. She is widely recognized for her knowledge, compassion, and ability to provide workable solutions to real-life problems. Dr. Tara earned her master's degree in Psychology from Antioch University. She did her internship at the Maple Center Clinic in Beverly Hills where she focused on adolescent, family, and child psychotherapy; her clinical training included counseling students at Beverly Hills High School. Fields received her MFCC license and started a practice in West Los Angeles. Two years later, she went back to graduate school to complete her doctorate degree in Psychology and thesis on adolescents and alcohol abuse.   To learn more about Tara Fields, visit http://www.drtara.com.

    Gastroenterologist and Clinical Nutritionist - Dr. Aron is the current acting director of the Center of Inflammatory Bowel Diseases at California Pacific Medical Center in San Francisco.  He is actively practicing and conducting research on Irritable Bowel Syndrome, Celiac disease, ulcerative colitis and Crohn's disease. He is the past president of the Board of the Northern California Chapter of the Crohn's Colitis Foundation of America, and was the recipient of its 2002 Premier Physician Award.  He also serves on the board of the American Celiac Society, and, together with his wife, Harriette, has written "Gut-Check: Your Prime Source for Bowel Health and Colon Cancer Prevention". For more about Dr. Aron, visit his website at www.gut-check.com.

    Senior Astronomer (SETI Institution) - Seth is a Senior Astronomer at the SETI Institute, in Mountain View, California. He has an undergraduate degree in physics from Princeton University, and a doctorate in astronomy from the California Institute of Technology. For much of his career, Seth conducted radio astronomy research on galaxies, and has published approximately fifty papers in professional journals. He also founded and ran a company producing computer animation for TV.  Seth has edited and contributed to a half dozen books. His first popular tome, “Sharing the Universe: Perspectives on Extraterrestrial Life” appeared in March, 1998. His most recent books are “Life in the Universe” (2002, textbook with Jeff Bennett and Bruce Jakosky) and “Cosmic Company” (2003, with Alex Barnett).