The document summarizes the Hollywood Blacklist period in the 1940s-1950s when the House Un-American Activities Committee (HUAC) investigated Hollywood for alleged communist influence. It describes how 10 people who refused to cooperate with HUAC's questioning became known as the Hollywood Ten and were imprisoned and blacklisted. It then provides biographies of several of the Hollywood Ten, including their careers and how they were impacted by being blacklisted.