by Werner Weick, Andrea Andriotto ; directed and produced by Werner Weick ; English version produced by Sheldon Rochlin for Mystic Fire Video ; English version directed by Carlo Altomare
produced by Barak Goodman, Rachel Dretzin ; directed by Barak Goodman ; written by Rachel Dretzin ; a Frontline co-production with 10/20 Productions, LLC ; WGBH Educational Foundation ; WGBH Boston