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Line of Duty theories - who is Jo Davidson's secret relative?
Line of Duty is famous for linking everything in the series to what has come before and this season is no exception.Ryan Pilkington, Terry Boyle, Steph Corbett, Ian Buckells, Jimmy Lakewell, Blackthorn Prison, Lee Banks, even Jackie Laverty all have reappeared on the show to add to its twisted mythology.We should not be surprised then that the latest episode showed another link, this time between Jo Davidson, played by Kelly Macdonald, and a mystery character.The end of episode four revealed that Acting Det Supt Jo Davidson is the blood relative of a key character already known to AC-12.They ran Jo’s DNA and found she is related to someone with a criminal record, someone shocking enough to elicit a “Mother of God” from Ted Hastings.When
