NGHT, Inc. ; produced by Michael Hoff Productions, Inc. for National Geographic Channel ; Victoria Kirk, producer ; Eric Anderson, Victoria Kirk, writers
produced by Pioneer Productions for National Geographic Channel ; executive producers, Simon Andreae and Andrea Florence ; directors, Stefanie Kern and Lorne Townend
produced by Pioneer Productions and Fox Television Studios in association with Channel 4 for National Geographic Television ; produced by Simon Andreae ; written and directed by Yavar Abbas
a production of Nova and National Geographic Television in association with Duncan Copp Ltd. ; NGHT, LLC and WGBH Educational foundation ; produced and directed by Duncan Copp
Eddie Bauer presents ; a National Geographic Film ; a film produced in association with Suzanne and Walter Scott Foundation ; director, Bruce Neibaur ; producers, Lisa Truitt and Jeff T. Miller ; written by Mose Richards