PBS ; a production of KERA ; produced in association with Once TV-Mexico City ; produced by Andrea Boardman, Ginny Martin, Rob Tranchin ; written by Rob Tranchin ; directed by Ginny Martin
co-production of The Kirk Documentary Group, Ltd. and WGBH Educational Foundation ; written, produced and directed by Michael Kirk ; produced and reported by Jim Gilmore
produced by Michael Kirk, Jim Gilmore, Mike Wiser ; written by Michael Kirk & Mike Wiser ; directed by Michael Kirk ; a Frontline production with Kirk Documentary Group ; WGBH Educational Foundation ; a production of WGBH Boston
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