<Tr> <Td> </Td> <Td> </Td> <Td> 6 </Td> <Td> 20 November 2012 </Td> <Td> 19 December 2012 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 6 </Td> <Td> 19 November 2013 </Td> <Td> 24 December 2013 </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> 6 </Td> <Td> 28 December 2014 </Td> <Td> 1 February 2015 </Td> </Tr> <P> The series premièred to overnight ratings of 6.160 million viewers, 25.6% of the available audience, as the highest rated show at 9 pm on 20 November . The series finale, airing 19 December 2012, also won its time - slot, achieving an overnight series high of 6.290 million viewers, 26.6% of the available audience . Consolidated figures released by the Broadcasters' Audience Research Board (BARB) revealed that the series première achieved a consolidated rating of 7.304 million viewers, whilst the finale had 7.480 million . The overall series average in terms of viewing figures was 7.316 million viewers . The Independent reported that the early consolidated ratings received by the programme made it the highest rated new mid-week television drama of 2012 . In September 2013, the series began airing on the American broadcast television network PBS . </P>

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