a Nova production by MDTV Productions for WGBH/Boston in association with ARTE France and Caldecott Productions International ; written, produced and directed by Mark Davis
a Nova production by Lion Television, All 3 Media, Medialab for WGBH/Boston in association with Channel 4 and Arte France ; produced and directed by Ian Bremner ; produced by Su-Mae Khoo
a series by Ambrica Productions in association with WGBH Boston and Channel 4 Television UK ; executive producer, Judith Vecchione ; written produced and directed by Sue Williams
presented by Zeitgeist Films ; written, produced and directed by Sue Williams ; Ambrica Productions in association with WGBH Boston and Channel 4 Television UK