Passionate Productions for BBC ; produced for NOVA by Holt Productions, LLC ; WGBH Boston ; produced and directed by Jemima Harrison and Sarah Holt ; writer for the BBC, Jemima Harrison ; executive producer for the BBC, Richard Klein ; senior executive producer, Paula S. Apsell
produced by Randall MacLowry, Tracy Heather Strain ; written and directed by Tracy Heather Strain ; senior series producer, Susan Bellows ; a Film Posse, Inc. production for American Experience
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
Pontecorvo Productions and Thirteen Productions LLC in association with National Geographic Channel, Sky Vision and WNET ; produced and written by Joe Pontecorvo