produced by Primitive Entertainment and Films à Trois in co-production with the National Film Board of Canada ; produced in association with Centre National de la Cinématographie ; directed by Nick de Pencier ; narration written by Elizabeth Arledge ; produced for NOVA by Elizabeth Arldege
a Nova/WGBH, La Cinquième, Südwestrundfunk, Gedéon Programmes, Meridian, and NHK co-production ; produced for Nova by Providence Pictures, Inc. for WGBH/Boston ; written and directed by Liesl Clark
produced by Kevin Bachar ; written by Rob Goldberg ; a Pangolin Pictures and Thirteen production in co-production with Terra Mater Factual Studios in association with WNET
a production of Table Mountain Films, Obsessively Creative, and Terra Mater Factual Studios in co-production with Thirteen in association with DTI South Africa ; written and directed by Joe Kennedy ; produced by Stefania Müller
director, Susan Fleming ; writers, Siobhan Flanagan, Gary Lang ; producer, Susan Fleming ; a production of Coy Wolf Inc. in association with Thirteen Productions LLC for WNET
director, Susan Fleming ; writer, Ted Remerowski ; produced in association with the Canadian Broadcasting Corporation ; in association with ARTE France ... [and others] ; produced by A Murder of Crows Inc
written and directed by Erna Buffie ; produced by Merit Jensen Carr ; produced in association with the Canadian Broadcasting Corporation ; a Merit Motion Pictures production
a production of Thirteen and ArgoFilms in association with WNET.org for PBS ; written, produced and directed by Allison Argo ; executive producer, Fred Kaufman ; series producer, Bill Murphy
a production of Pontecorvo Productions and Thirteen in association with Wildlife Media, National Geographic Channel and WNET New York Public Media ; writer, producer, and director of photography, Joseph Pontecorvo