<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>
<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>
how many episodes of blue planet 2 will there be
how many episodes of blue planet 2 will there be
7
7