Line of Duty's Martin Compston hints a major character from series 2 could ...

Line of Duty's Martin Compston has hinted a major character from series two could return for the final on Sunday night - and could even be 'H'. 

The actor, 36, - who plays DI Steve Arnott - shared a new video to his Twitter on Friday larking around with Mark Bonnar, who played DCC Mike Dryden. 

In the 13-second clip, Martin sang the alphabet, but when he got to the letter H, Mark popped up beside him and stared into the camera. 

Clue? Line of Duty's Martin Compston has hinted a major character from series two could return for the final on Sunday night - and could even be 'H'

Clue? Line of Duty's Martin Compston has hinted a major character from series two could return for the final on Sunday night - and could even be 'H'

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Martin then said: 'Oh, hello Mark,' before the pair both burst out laughing.   

The new video appears to hint that DCC Dryden will return for the final after serving a suspended sentence for perverting the course of justice in series two.  

It was revealed in that series that he was having an affair with DS Lindsay Denton -played by Keeley Hawes - before pressuring her into having an abortion.

Funny: The actor, 36, - who plays DS Steve Arnott - shared a new video to his Twitter on Friday larking around with Mark Bonnar, who played DCC Mike Dryden

Funny: The actor, 36, - who plays DS Steve Arnott - shared a new video to his Twitter on Friday larking around with Mark Bonnar, who played DCC Mike Dryden

Coming back? The new video appears to hint that DCC Dryden will return for the final after serving a suspended sentence for perverting the course of justice in series two

Coming back? The new video appears to hint that DCC Dryden will return for the final after serving a suspended sentence for perverting the course of justice in series two

He then used then OCD leader Tommy Hunter's sex trafficking victim Carly Kirk and authorised the operation that got Hunter murdered, which Denton was then framed for. 

Fans went wild over the video, as they questioned if DCC Dryden is in fact the notorious 'H'.    

One commented saying: 'Ehhhhh he just stopped before he said H!!!!!!! He popped up on H!!!!!!!'

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Hint? In the 13-second clip, Martin sang the alphabet, but when he got to the letter H, Mark popped up beside him and stared into the camera

Pals: Martin then says: 'Oh, hello Mark,' before the pair both burst out laughing

Hint? In the 13-second clip, Martin sang the alphabet, but when he got to the letter H, Mark popped up beside him and stared into the camera

Rumours: The new video was posted ahead of the highly-anticipated final which will air on Sunday night

Rumours: The new video was posted ahead of the highly-anticipated final which will air on Sunday night

Another wrote: 'Oooo why are they together, is he going to be 'H'?

A third said: 'Is this a clue', while another wrote: 'H...I, J....oh hang on. I see what ye've done there!!

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