<Li> Esme Coy as Rowella Chynoweth (series 3) </Li> <Li> Will Merrick as Arthur Solway (series 3) </Li> <Table> <Tr> <Th_colspan="2"> Series </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th> Average UK viewers (millions) </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 8 </Td> <Td_colspan="1"> 8 March 2015 (2015 - 03 - 08) </Td> <Td> 26 April 2015 (2015 - 04 - 26) </Td> <Td> 8.11 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 10 </Td> <Td_colspan="1"> 4 September 2016 (2016 - 09 - 04) </Td> <Td> 6 November 2016 (2016 - 11 - 06) </Td> <Td> 6.94 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 9 </Td> <Td_colspan="1"> 11 June 2017 (2017 - 06 - 11) </Td> <Td> 6 August 2017 (2017 - 08 - 06) </Td> <Td> 6.68 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Series </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th> Average UK viewers (millions) </Th> </Tr>

How many episodes of poldark in series 3