Judith Malina was a German-born American actress, director and writer. With her husband Julian Beck, Malina co-founded The Living Theatre, a radical political theatre troupe that rose to prominence in New York City and Paris during the 1950s and 1960s. The Living Theatre and its founders were the subject of the 1983 documentary Signals Through The Flames.

Julian Beck was an American actor, stage director, poet, and painter. He is best known for co-founding and directing the Living Theatre, as well as his role as Reverend Henry Kane, the malevolent preacher in the supernatural horror film Poltergeist II: The Other Side (1986). The Living Theatre and its founders were the subject of the documentary film Signals Through the Flames (1983).