'Line of Duty's' Anna Maxwell Martin shrugs off fan Morse code theory: 'I was just bored'

WARNING: Embargoed for publication until 00:00:01 on 13/04/2021 - Programme Name: Line of Duty S6 - TX: n/a - Episode: Line Of Duty - Ep 5 (No. n/a) - Picture Shows:  Carmichael (ANNA MAXWELL MARTIN) - (C) World Productions - Photographer: Screen Grab
Anna Maxwell Martin stars in Line Of Duty. (World Productions/BBC)

Line Of Duty star Anna Maxwell Martin has shrugged off a fan theory that her character tapped out the Morse code for "H" during an interview scene, claiming she was "just bored".

Keen viewers of the hit BBC police procedural have been scouring series six for clues as to the identity of police corruption boss H, or The Fourth Man, and thought they'd uncovered a big one during a lengthy interview scene in episode six.

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Maxwell Martin's character DCS Patricia Carmichael is Superintendent Ted Hastings' (Adrian Dunbar) nemesis and has been brought in to replace him as the head of AC-12, but fans have been suspicious that she could be part of a corrupt officers network.

It seemed she had given away a spoiler on Sunday night when Carmichael tapped her pen against the desk in Morse code for H, but the actor told This Morning that fans have got it wrong – she was just trying to cope with the boredom of a long shoot.

Laughingly saying she had no idea it was Morse code, she added: "I think I was just bored. Those scenes are very long. I think I was like, ‘What am I saying next?’"

The interview scene, where Carmichael, Hastings and DI Steve Arnott (Martin Compston) grilled DS Jo Davidson (Kelly Macdonald) about her links to organised crime, ran to nearly half an hour of the hour-long episode and the apparent spoiler sparked a number of tweets from viewers.

But along with her co-stars, Maxwell Martin managed to keep series creator Jed Mercurio's next plot twists a secret by claiming that she couldn't remember much about filming the series.

Read more: Test your Line Of Duty knowledge with our quiz

She told This Morning hosts Phillip Schofield and Holly Willoughby: “When I was filming Line Of Duty, I was filming Motherland at the same time, so I was rushing on to each set and I just can’t remember anything.

"Either that, or they play tricks on you and when they drop you off at Belfast airport and they blank your mind, so you can’t remember anything.”

Programme Name: Line of Duty S6 - TX: 25/04/2021 - Episode: Line Of Duty - Ep 6 (No. n/a) - Picture Shows:  Superintendent Ted Hastings (ADRIAN DUNBAR), Carmichael (ANNA MAXWELL MARTIN) - (C) World Productions - Photographer: Steffan Hill
Adrian Dunbar and Anna Maxwell Martin play bitter rivals in Line of Duty (Photo: World Productions/BBC - Photographer: Steffan Hill)

Macdonald appeared on BBC Breakfast on Monday morning and also stayed vague on the details of what would unfold in the final episode of series six.

She said: "I'm in this weird world where I'm not watching it and I'm also not going online, so I'm not too aware...

"13 million, that's a lot of people watching it, but I am not one of them. I watched the first episode and I also went online and it took me a week to not be mental any more."

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