Line of Duty season 6 finale: when is the final episode on TV, what will happen and will we find out who is H?

The BBC has teased a tense finale, stating that ‘every investigation has led to this…’.

After six griping episodes, season six of BBC’s hit crime show Line of Duty will conclude on Sunday night (2 May).

The sixth season has become a fixture on the nation’s schedule, being watched by 11 million viewers last week.

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After six griping episodes, season six of BBC’s hit crime show Line of Duty will conclude on Sunday night (2 May) (C) World Productions - Photographer: Steffan Hill

So when is the final episode on TV, and what should viewers expect from the finale?

When is the final episode on TV?

The Line of Duty season six finale will air on BBC One and BBC iPlayer on Sunday 2 May at 9:00pm.

The episode will be 60 minutes long.

Viewers may finally learn who the so-called ‘fourth man’ really is (Mark Hall)

All six seasons are available for catch up on BBC iPlayer.

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What will happen in the final episode?

Line of Duty dropped a short, but explosive, trailer for the much-anticipated season six finale at the start of this week.

The teaser promises that “Every investigation has led to this” before cutting to a shot of AC-12’s investigation board - with a spot yet to be filled by ‘person H’.

This may mean that viewers may finally learn who the so-called ‘fourth man’ really is.

The trailer also showed glimpses of suspected police officers, including Patricia Carmichael (Anna Maxwell-Martin), Chief Constable Philip Osborne (Owen Teale), and the apparently deceased Marcus Thurwel (James Nesbitt).

AC-12 members, Steve Arnott (Martin Compston), Kate Fleming (Vicky McClure) and Chloe Mishop (Shalom Brune-Franklin) were also seen heading to a spot with an armed police operation.

Finally, audiences were shown a shot of a police document featuring the misspelling of the word ‘definite’. A clue that has seen Superintendent Ted Hastings (Adrian Dunbar) pushed forward as a potential suspect because of his misspelling of the word definitely - which he wrote as ‘definately’.