a BBC Studios Natural History Unit production ; a co-production with BBC America, Tencent, WDR, France Televisions and CCTV9 ; a BBC Open University partnership ; executive producer, James Honeyborne ; series producer, Mark Brownlow ; producers, Miles Barton, Orla Doherty, Kathryn Jeffs, Will Ridgeon, John Ruthven, Jonathan Smith
an Otter Films production for BBC and WGBH Boston ; produced by John Aitchison ; prologue produced by Anna Lee Strachan ; senior executive producer, Paul S. Apsell
A Films for the Humanities & Sciences presentation ; BBC Productions ; series producer, James Van der Pool ; series editor, Andrew Cohen ; written & directed by Helen Shariatmadari