a Maya Vision production in association with the BBC and PBS ; written and presented by Michael Wood ; directed by David Wallace ; produced by Rebecca Dobbs
an ArtMattan Productions release ; Periscope Productions and BBC, ZDF, Arte, IKON, VRT, RTBF, YLE, and in association with History Television, SBS Television, and Danmarks Radio ; produced by Paul Pauwels, Nick Fraser, Olaf Grunert, Wessel van der Hammen, Philippe Van Meerbeck, Bill Binnemans, and Iikka Vehkalahti ; written and directed by Peter Bate
produced by Patricia Asté ; directed by Noland Walker ; written by Margaret Koval, Noland Walker ; produced by Koval Films, LLC, in association with NBPC ; co-production of Koval Films, LLC, the Independent Television Service and Oregon Public Broadcasting