 In Australia, the series premiered on 15 February 2017 on the Nine Network.As for New Zealand, it aired from 9 July 2017 at Prime channel.The series debuted in Canada and the United States on 18 February 2017, with the Canadian broadcast on the local BBC Earth channel (which recently launched), In the United States, the series premiered with a three-network simulcast across BBC America, AMC, and SundanceTV (owned by AMC Networks, who manages BBC America on behalf of BBC Worldwide).