Fans are already at the edge of their seats waiting to find out the truth after tuning into series six of Line of Duty, which has been explosive. So many theories have been circulating about who H is and who else might be corrupt. Hopefully all will be revealed in the concluding episode, but Steve Arnott actor Martin has dismissed one theory as being "totally wrong".
Many viewers believe Patricia Carmichael (played by Anna Maxwell Martin) is H.
The assumption makes sense, after all, Patricia is adamant on ending Ted Hastings' (Adrian Dunbar) career and investigations into the Organised Crime Group (OCG).
Eagle-eyed fans have also picked up on some suspicious clues.
Taking to Twitter, one viewer posted recently: “We all know Patricia Carmichael is H. Jimmy Lakewell said ‘look beyond the RACE CLAIM to find H’.Insurance Loans Mortgage Attorney Credit Lawyer
“So take the letters of RACE CLAIM from the letters of CARMICHAEL. What do you get? H. Solved it.”
READ MORE: Steve Arnott exposed as final H with season 1 OCG plot
Line of Duty: Martin Compston ends theory (Image: BBC)
Line of Duty: Jo Davidson has also been suspected (Image: BBC)
Another added: “Carmic-H-ael. Just saying. #LineOfDuty,” as a third posted: “Carmichael is so bent, I swear she is H #LineOfDuty.”
"As a newbie to the #LineOfDuty party I just want to note that Carmichael tapped her pen four times. Seems suspicious, just saying," another wrote.
But Martin has quashed this idea. Talking about the various theories on The Jonathan Ross Show recently, Martin suggested himself that Carmichael is not H.
He said: "Do you know what I love about that one? It’s so spot on, but that line never got said.
Line of Duty: Will H be exposed on the final episode? (Image: BBC)
Line of Duty: Martin Compston said