Shira Leibowitz Schmidt is best known for the book she co-authored with Nobel Prize laureate Roald Hoffman, “Old Wine, New Flasks: Reflections on Science and Jewish Tradition.” From her perch in the Chassidic enclave of Kiryat Sanz, where the film Hidden Face was shot, she has interviewed dozens of Holocaust survivors who were helped by the Sanz-Klausenberger Rebbe to rebuild their lives.