<Tr> <Th> 9 </Th> <Td> David Mitchell </Td> <Td> 5 August 2009 (2009 - 08 - 05) </Td> <Td> 4.55 </Td> </Tr> <Tr> <Th> 10 </Th> <Td> Kim Cattrall </Td> <Td> 12 August 2009 (2009 - 08 - 12) </Td> <Td> 6.27 </Td> </Tr> <Tr> <Td_colspan="4"> Cattrall researches her maternal grandfather, George Baugh's mysterious disappearance in 1938 . She discovers that he became a bigamist in 1939 and had four more children . The episode reveals that Baugh's new family immigrated to Australia in 1961, and had lived there until Baugh's death in 1974 . </Td> </Tr> <Tr> <Th> 11 </Th> <Td> Martin Freeman </Td> <Td> 19 August 2009 (2009 - 08 - 19) </Td> <Td> 6.48 </Td> </Tr>

Who do you think you are uk season 15