Kurt Gerstein—a member of the Institute for Hygiene of the Waffen-SS—is horrified by what he sees in the death camps. he is then shocked to learn that the process he used to purify water for his troops by using Zyklon-B, … Ulrich Tukur, Mathieu Kassovitz, Ulrich Mühe, Michel Duchaussoy, Marcel Iureș, Ion Caramitru, Friedrich von Thun Added on HBO 2022-06-17. Youtube Trailer