Pontecorvo Productions and Thirteen Productions LLC in association with National Geographic Channel, Sky Vision and WNET ; produced and written by Joe Pontecorvo
a co-production of JTN Productions and Thirteen ; in association with NDR and WNET.org ; produced and directed by Mike Dewitt ; written by Mike Dewitt, Daniel Jonah Goldhagen
director, Susan Fleming ; writers, Siobhan Flanagan, Gary Lang ; producer, Susan Fleming ; a production of Coy Wolf Inc. in association with Thirteen Productions LLC for WNET
produced by Thirteen in association with WNET.org and National Geographic Channel ; executive producer, Fred Kaufman ; written and produced by Gianna Savoie
written and directed by Klaus Feichtenberger ; producers, Dieter Pochlatko, Nikolaus Wisiak ; a co-production of EPO-Film, ORF/Universum and Thirteen in association with BBC, NDR and WNET New York Public Media
written and produced by Joe Kennedy ; directors, Joe Kennedy, Nic Young ; producer, Katharina Pechel ; an Off the Fence production for Thirteen in association with ARTE and WNET.org