<P> The series is airing in Canada and the United States on 20 January 2018 . In Canada, it will broadcast with a three - network simulcast across BBC Earth, Cottage Life and T + E channel . In the United States, the series will premier the first episode - with a five - network simulcast across BBC America, AMC, IFC, WE tv and Sundance TV, while the remaining episodes will continue to be air every Saturday on BBC America . It is also available on BBCAmerica.com and the BBCA app . </P> <P> As for Australia, the series will premiere on Nine Network and 9Now on 17 February 2018 . In New Zealand, it premiered on 12 November 2017 on TVNZ 1 . </P> <Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Produced by </Th> <Th> Original air date </Th> <Th> UK viewers (millions) </Th> </Tr> <Tr> <Th> - </Th> <Td> "The Prequel" </Td> <Td> N / A </Td> <Td> 27 September 2017 (2017 - 09 - 27) </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="5"> A 5 - minute clip introduction which focus for the upcoming stories from the ocean depths . </Td> </Tr> <Tr> <Th> </Th> <Td> "One Ocean" </Td> <Td> Jonathan Smith </Td> <Td> 29 October 2017 (2017 - 10 - 29) </Td> <Td> 14.01 </Td> </Tr> <Tr> <Th> </Th> <Td> "The Deep" </Td> <Td> Orla Doherty </Td> <Td> 5 November 2017 (2017 - 11 - 05) </Td> <Td> 13.97 </Td> </Tr> <Tr> <Th> </Th> <Td> "Coral Reefs" </Td> <Td> Jonathan Smith </Td> <Td> 12 November 2017 (2017 - 11 - 12) </Td> <Td> 13.45 </Td> </Tr> <Tr> <Th> </Th> <Td> "Big Blue" </Td> <Td> John Ruthven </Td> <Td> 19 November 2017 (2017 - 11 - 19) </Td> <Td> 13.11 </Td> </Tr> <Tr> <Th> 5 </Th> <Td> "Green Seas" </Td> <Td> Kathryn Jeffs </Td> <Td> 26 November 2017 (2017 - 11 - 26) </Td> <Td> 12.62 </Td> </Tr> <Tr> <Th> 6 </Th> <Td> "Coasts" </Td> <Td> Miles Barton </Td> <Td> 3 December 2017 (2017 - 12 - 03) </Td> <Td> 11.45 </Td> </Tr> <Tr> <Th> 7 </Th> <Td> "Our Blue Planet" </Td> <Td> Orla Doherty, Will Ridgeon </Td> <Td> 10 December 2017 (2017 - 12 - 10) </Td> <Td> 11.91 </Td> </Tr> <Tr> <Td_colspan="5"> Examining the role of human anthropogenic activity on the oceans . Microplastics and pollution are an increasing problem for the world's seas, threatening the lives of marine life and ultimately affecting the ecosystem . Can humans reverse their activity to protect the seas and the wildlife that inhabit it? </Td> </Tr> <Tr> <Th> - </Th> <Td> "Oceans of Wonder" </Td> <Td> N / A </Td> <Td> 1 January 2018 (2018 - 01 - 01) </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="5"> A 90 - minute compilation episode which highlights the wonders of our world's oceans as well as filming some extraordinary animal behaviours which were never seen before . </Td> </Tr> </Table> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Produced by </Th> <Th> Original air date </Th> <Th> UK viewers (millions) </Th> </Tr>

How many episodes of blue planet 2 will there be