produced by Spectrum Field Productions LLC for Animal Planet ; executive producers, Guy Nickerson, Jim Rapsas ; director, Guy Nickerson ; producer, Sara Helman
written and produced by Anthony Lacques ; producer, Bruce Nash ; created by Bruce Nash ; produced by Actuality Productions, Inc. for History Television Network Productions
a Quest Productions and Kikim Media production for Nova ; in association with the Catticus Corporation ; WGBH Educational Foundation ; senior series producer, Melanie Wallace ; produced and directed by Michael Schwarz and Bill Jersey