David Thomson - called "without doubt, the greatest living film historian" by the LA Times - is the author of The New Biographical Dictionary of Film, a biography on Nicole Kidman, a novel co-written by Marlon Brando, and The Whole Equation: A History of Hollywood. He'll be talking about his latest "Great Stars" series that looks at the Hollywood backstories of Humphrey Bogart, Ingrid Bergman, Bette Davis, and Gary Cooper. 5m6q73