producer [for Tigress Productions], Sarah Williams ; director, Justine Kershaw ; producers [for WNET-Nature], Jessica Siegel, Jill Clarke ; a Tigress production ; a co-production of Thirteen/WNET and the BBC
National Geographic Television ; Tigress Productions ; produced and directed by Graham Booth, Harvey Lilley, Matthew Thompson ; series producer, Andrew Jackson
Partridge Productions ; written by Phil Agland ; produced by Phil Agland, Michael Rosenberg ; directed by David Heeley ; a presentation of WNET/Thirteen in association with the Nature Conservancy