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
a Nova production co-produced by Pioneer Film and Television Productions Limited with China International TV Corporation with CCTV-10 and PAAN Media Holdings Co. Limited, with KBS Korea in association with PBSd, for WGBH and KBS ; series director, Kate Dart ; senior series producer, Melanie Wallace
Pontecorvo Productions and Thirteen Productions LLC in association with National Geographic Channel, Sky Vision and WNET ; produced and written by Joe Pontecorvo