a Mitchell Beazley Television, RM Arts/Channel Four co-production in association with the Nigerian Television Authority ; written and presented by Basil Davidson ; produced by John Percival ; directed by John Percival, Christopher Ralling, Andrew Harries, and Mick Csaky
produced by the National Geographic Society and WQED, Pittsburgh ; executive producers, Dennis B. Kane, Thomas Skinner ; produced and photographed by Stanley Breeden, Belinda Wright ; written by Stanley Breeden
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
produced by Atlantic Productions in association with PBS and Devillier Donegan Enterprises ; series producer, Anthony Geffen ; series written & directed by Cassian Harrison