directed by Gernot Lercher ; narrated by James Lurie ; produced by Yvette Durrenberger, Elisabeth Faber, Gabriele Wistawel, Heike Lettau, Thirteen Productions
BBC Earth, Reliance Entertainment and IM Global Present ; a BBC Earth production ; directed by Mike Slee, Patrick Morris, Neil Nightingale ; produced by Myles Connolly, Neil Nightingale, Amanda Hill