Di Bonaventura Pictures ; John Wells Productions ; Stillking Films ; Universal Studios ; Warner Bros. ; produced by John Wells, Lorenzo di Bonaventura ; story by David Callaham ; screenplay by David Callaham and Wesley Strick ; directed by Andrzej Bartkowiak
written, produced and directed by Mark Davis ; a NOVA production by MDTV Productions for WGBH/Boston in association with National Geographic Channel International