The movie's star, Rosaura Revueltas, was deported during the shooting of the film, requiring the producers to use a double in some scenes and to shoot film of others and record her narration in Mexico. The home of one of the union members/actors and the union hall were burned down shortly after the end of shooting. Clinton Jencks, the Mine Mill organizer depicted in the film, was thereafter convicted of falsely stating he was not a communist on the affidavit required of all union representatives under the Taft-Hartley Act; his conviction was overturned by the Supreme Court in "Jencks v. United States," 353 U.S. 657 (1957).