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
a co-production of Tigress Productions Limited and Thirteen/WNET New York in association with British Broadcasting Corporation ; producer, Linda Bell ; director, David Allen
a BBC/Discovery/Antena 3 Television S.A./ZDF/Open University/Skai co-production in association with Discovery Canada ; series producer, Vanessa Berlowitz ; producers, Miles Barton, Vanessa Berlowitz, Kathryn Jeffs, Mark Linfield, Dan Rees
BBC Worldwide Ltd. ; British Broadcasting Corporation ; 2 Entertain Video Limited ; a Wildvision/National Geographic Channel US co-production ; series producer, Patrick Morris ; producers, Patrick Morris, Andrew Murray
2 Entertain ; BBC ; BBC Earth ; a BBC/Discovery Channel/France Television co-production ; series producer, Dale Templar ; executive producer, Brian Leith ; BBC Productions Bristol/Wales
a BBC/Discovery Channel co-production in association with Wanda Firms ; series producer, Karen Bass ; produced by Justin Anderson, Peter Bassett, Joe Stevens, Hugh Pearson and Jeff Turner
British Broadcasting Corporation ; series producer, Huw Cordey ; produced and directed by Mark Brownlow, Jonathan Clay, and Chiara Bellati ; a BBC/Discovery Channel co-production
John Downer Productions for BBC and Discovery Channel ; produced by John Downer, Rob Pilley, Philip Dalton and Tilly Parker ; directed and written by John Downer
series producer, Martha Holmes ; executive producers, Michael Gunton, Susan Winslow ; producer/writer, Paul Spillenger ; a BBC/Discovery Channel/SKAI co-production in association with RTI SpA