What you need to know ahead of the Line Of Duty finale

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Contains spoilers...
Lies, affairs, murder, evidence tampering, amputation, a man in a balaclava going postal with a baseball bat: this season of Line Of Duty has pretty much had it all. But ahead of this Sunday's finale episode, there are still so many questions that we're not 100% confident the show can answer them all in its 60 allotted minutes.
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Who killed Tim the forensics guy? Was it the same person who took his fingers on their way out? Why did Maneet go rogue mere days before disappearing on maternity leave? Was the smarmy lounge-lizard ACC Hilton actually the Caddy's patron, or - unthinkably - was it in fact Ted Hastings?
Since the newly one-armed Roz Huntley had her hapless husband hauled off in a police car at the end of episode five, Twitter has been awash with theories, jokes, intrigue, hints and expressions of total bamboozlement. Here are some of the best.
1. Who is Balaclava Man?
This is, hands down, the most important question on everyone's minds, regardless of what's going on IRL.
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Most seem to be coming round to the idea that flashy lawyer Jimmy Lakewell is the most likely.
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And these rumours were not helped by the actor's appearance on GMB this week...
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But there are plenty of other theories out there. Is it actually the jobsworth stand-in DCI Buckells?
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While there are a few who don't think it's one person at all...
2. Jodie is a lickspittle toady kiss-arse and she needs to go
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3. What actually happened to poor old Tim Ifield the fingerless forensics wonk?
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3b. And what happened to his fingers?
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4. Maneet has let us all down
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5. If you've learned one thing over the past six weeks, it's this...
6. Steve's recovery and return to work presents its own questions...
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7. The upstanding Ted Hastings is beyond reproach and we won't have it said otherwise
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7b. Though all these twists and turns have thrown even that into doubt
8. Sunday night cannot come soon enough
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