Bullfrog Films presents ; a Judy Jackson film ; directed and written by Judy Jackson ; produced by Judy Jackson, Deborah Parks ; produced by Judy Films Inc. ; produced in association with Knowledge Network, Saskatchewan Communications Network, TVOntario
Petrolio presents; in coproduction with Miramonte Film and ZDF in collaboration with Arte in cooperation with RAI Südtirol ; a Hannes Lang film ; directed and visual concept by Hannes Lang ; written by Mareike Wegener, Hannes Lang ; producer, Hannes Lang
a Frontline co-production with the Palfreman Film Group ; WGBH Educational Foundation ; written by Jon Palfreman and T.R. Reid ; produced and directed by Jon Palfreman