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Line Of Duty: 8 Things The Series 6 Finale Absolutely Must Deliver

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“Every investigation has led to this.”

After six weeks of intense drama, Line Of Duty is about to air what could be its most significant episode ever, as the hunt for “the fourth man” – otherwise known as “H” – reaches its climax on Sunday night.

It’s the moment fans of the hit BBC cop show have been waiting more than four years for, as the first mention of “H” goes as far back as series four.

If the finale plays out in the way many are hoping it will, it means that not only will another corrupt officer be unmasked, but various story strands from the show’s 10-year history will get tied up, along with many other loose ends from the current series.

Here’s what absolutely has to be included in the blockbuster episode...

1. A resolution to Davidson’s story

If there’s a phrase we’d happily never hear again after that penultimate episode, it’s “no comment”.

DCI Jo Davidson’s AC-12 interrogation didn’t exactly deliver much in the way of fresh information about the elusive character, her motivations or her connections to the OCG beyond her blood links to Tommy Hunter. As a result, her story feels somewhat incomplete.

Who did she believe her father was? What’s her connection to Marcus Thurwell? Why has she taken the rap for Pilkington’s death?

From the series finale trailer, it looks like there might be something in the way of a conclusion for Davidson, as she is seen being transferred in a van with a corrupt prison officer.

This suggests she could meet the same fate as her birth father. Hunter was killed in series two, when bent officers staged an ambush on his police convoy to stop him revealing their identities, after he’d agreed to co-operate with police in exchange for witness protection.

Hopefully Davidson manages to speak out before any attempt on her life.

2. Answers about Hastings

Question marks have been hanging over........

© HuffPost

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