123Movies. A detailed look at the events leading up to the blacklisting of Hollywood writers and artists. In October 1947 nineteen Hollywood personalities were subpoenaed by the House Committee on Un-American Activities to testify about their knowledge or possible involvement in the American Communist Party. The first ten to be called refused to cooperate, claiming their first amendment rights, were cited for contempt of Congress and sent to prison. They became known as the "Hollywood Ten" and this is their story.