a film by Lorenz Knauer ; a NEOS Film GmbH and Co. KG, CC Medienproduktion GmbH & Co. KG, Sphinx Media GbR production in association with Animal Planet [and others] ; produced by Philipp Schall, Philipp Wundt, Michael Halberstadt ; written and directed by Lorenz Knauer
a film by Brett Morgen ; a National Geographic Studios production in association with Public Road Productions ; National Geographic Documentary Films presents ; produced by Brett Morgen, Bryan Burk, James Smith, Tony Gerber ; written and directed by Brett Morgen