writers/directors, Marion Gruner, Christopher Sumpton ; producers, Christopher Sumpton, Robin Benger, Marion Gruner ; produced in association with Arte France, Unité Découverte et Connaissance ; and in association with Canadian Broadcasting Corporation ; Cogent Benger Productions Inc
written and directed by Frauke Sandig and Eric Black ; produced by Frauke Sandig, Umbrella Films and Eric Black in co-production with Hanfgarn & Ufer Filmproduktion, and ZDF/3sat