A small group known as the “Hollywood Ten” resisted, complaining that the hearings were illegal and violated their First Amendment rights. They were all convicted of obstructing the investigation and served jail terms. Pressured by Congress, the Hollywood establishment started a blacklist policy, banning the work of about 325 screenwriters, actors and directors who had not been cleared by the committee. Those blacklisted included composer Aaron Copland, writers Dashiell Hammett, Lillian Hellman and Dorothy Parker, playwright Arthur Miller and actor and filmmaker Orson Welles.

Some of the blacklisted writers used pseudonyms to continue working, while others wrote scripts that were credited to other writer friends. Starting in the early 1960s, after the downfall of Senator Joseph McCarthy, the most public face of anti-communism, the ban began to lift slowly. In 1997, the Writers’ Guild of America unanimously voted to change the writing credits of 23 films made during the blacklist period, reversing—but not erasing—some of the damage done during the Red Scare.