Peter Stephen Paul Brook was an English theatre and film director. He worked first in England, from 1945 at the Birmingham Repertory Theatre, from 1947 at the Royal Opera House, and from 1962 for the Royal Shakespeare Company (RSC). With them, he directed the first English-language production in 1964 of Marat/Sade by Peter Weiss, which was transferred to Broadway in 1965 and won the Tony Award for Best Play, and Brook was named Best Director. He also directed films such as an iconic version of Lord of the Flies in 1963.

Peter Ulrich Weiss was a German writer, painter, graphic artist, and experimental filmmaker of adopted Swedish nationality. He is particularly known for his plays Marat/Sade and The Investigation and his novel The Aesthetics of Resistance.