hosted and narrated by Chris Morgan ; written and produced by Joseph Pontecorvo ; Pontecorvo Productions and Thirteen in association with Wildlife Media, National Geographic Channel and WNET New York Public Media
hosted and narrated by Chris Morgan ; written and produced by Joseph Pontecorvo ; Pontecorvo Productions and Thirteen in association with Wildlife Media, National Geographic Channel and WNET New York Public Media
narrated by Liam Neeson ; produced and written by Joe Pontecorvo ; Pontecorvo Productions and Thirteen Productions LLC in association with National Geographic Channel, Sky Vision and WNET
hosted and narrated by Chris Morgan ; written and produced by Joseph Pontecorvo ; Pontecorvo Productions and Thirteen in association with Wildlife Media, National Geographic Channel and WNET New York Public Media