The Front is a 1976 comedy-drama film set against the Hollywood blacklist in the 1950s. It was written by Walter Bernstein, directed by Martin Ritt and stars Woody Allen and Zero Mostel.
Because of the blacklist, a number of artists, writers, directors and others were rendered unemployable, having been accused of subversive political activities in support of Communism or of being Communists themselves.
Several people involved in the making of the film ? screenwriter Bernstein, director Ritt, and actors Mostel, Herschel Bernardi, and Lloyd Gough ? had themselves been blacklisted. (The name of each in the closing credits is followed by "Blacklisted 19--" and the relevant year.) Bernstein was listed after being named in the Red Channels journal that identified alleged Communists and Communist sympathizers.
(Summary from Wikipedia)