Katahdin Productions and Match&Spark present, in association with ARTE and NDR, and The Emanuel Ringelblum Jewish Historical Institute ; a film by Roberta Grossman ; written, produced and directed by Roberta Grossman ; consulting scholar, Samuel D. Kassow ; executive producers, Nancy Speilberg, Ronald S. Lauder, Al Berg, Ori and Mirit Eisen, Anna Różalska, Philippa Kowarsky