Fans have been gripped to the edge of their seats to find out the identity of 'H' and they haven't got long until they find out, as the finale of Line Of Duty airs on Sunday 2 May.
Ahead of the final episode of the series on BBC One, bookies have released the latest odds and it looks like Patricia Carmichael is favourite to be revealed as 'H'.The love-to-hate copper currently has odds of 2/1, followed by Chief Constable Philip Osborne who has odds of 4/1 to be unveiled as the mysterious fourth man.Third in line is Ted Hastings at 8/1 while Marcus Thurwell ranks in fourth place, at 11/1.
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