a film by Maria Finitzo ; produced in association with the British Broadcasting Corporation, Canadian Broadcasting Corporation, SBS-TV Australia ; produced by Kartemquin Educational Films
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
a film by Maria Finitzo ; executive producer, Gordon Quinn ; produced in association with The British Broadcasting Corporation, The Canadian Broadcasting Corporation, SBS-TV Australia ; produced by Kartemquin Educational Films, Inc
produced by 90th Parallel Film & Television Productions Ltd. ; produced in association with ARTE France, Unitâe Dâecouverte et Connaissance ; produced in association with Canadian Broadcasting Corporation ; produced and directed by Mike Sheerin ; writers, Norman Doidge, Mike Sheerin
A production of Clearwater Documentary Inc. ; produced in association with Canadian Broadcasting Corporation ; The Nature of Things ; Directed and written by Tom Radford, Niobe Thompson ; produced by Niobe Thompson