Arhimedia presents ; a film by Cosima Spender ; written and directed by Cosima Spender ; written and produced by John Hunt ; an Archimedia production ; produced by James Gay-Rees
National Geographic Television ; Tigress Productions ; produced and directed by Graham Booth, Harvey Lilley, Matthew Thompson ; series producer, Andrew Jackson
Wall to Wall Television for BBC and PBS in association with ITEL ; written and presented by Henry Louis Gates, Jr. ; directors, Nick Godwin, Helena Appio