produced & directed by Giles Badger ; a BBC Studios Natural History Unit production ; co-produced with BBC America, Tencent Penguin Pictures, ZDF, France Télévisions and China Media Group CCTV9
A production of the Educational Film Center and Christenson Associates ; writers, Louis Barbash, Patrick Prentice ; producer/director, Ira H. Klugerman
a Nova production by Bsquared Media for WGBH Boston in association with Arte France ; written by David Murdock & Bonnie Brennan ; produced and directed by Bonnie Brennan