in U.S. history, 10 motion-picture producers, directors, and screenwriters who appeared before the House Un-American Activities Committee in October 1947, refused to answer questions regarding their possible communist affiliations, and, after spending time in prison for contempt of Congress, were mostly blacklisted by the Hollywood studios. The 10 were Alvah Bessie, Herbert Biberman, Lester Cole, Edward Dmytryk (Dmytryk, Edward), Ring Lardner, Jr., John Howard Lawson (Lawson, John Howard), Albert Maltz, Samuel Ornitz, Adrian Scott, and Dalton Trumbo (Trumbo, Dalton).

The group originally included the German writer Bertolt Brecht (Brecht, Bertolt), but Brecht fled the country on the day following his inquest, and the remaining 10 were voted in contempt of Congress on Nov. 24, 1947. Convicted in federal court the following year, they were given sentences of six months to one year in prison. (While in prison, Dmytryk broke with the rest and agreed to cooperate, admitting being a communist and giving the names of 26 others.)

With the exception of Dmytryk, the group was severely blacklisted by the film industry. Most were never again employed in Hollywood, but some did write scripts under pseudonyms. As “Robert Rich,” Trumbo won an Academy Award Oscar for best screenplay for The Brave One (1956). The red blacklist disappeared by the early 1960s, and Trumbo and Lardner subsequently wrote screenplays under their own names.