But when a humble repairman called Patrick Harbottle moves into the house across the street under suspicious circumstances, Huw believes he's got his culprit and makes a pact with himself to bring him down.
"He can’t let it go," said Jason Watkins. "Now he feels he must resolve this case before he dies, really.
But does he succeed? Or does The Ripton Stalker remain undefeated?
The Game ending explained
In the least surprising turn ever, Patrick Harbottle was revealed to be The Ripton Stalker, a confession he himself made to Huw in episode 2, after he’d spiked his drink.
For those expecting a big twist – that Huw had made a horrible mistake and Patrick was in fact innocent, or there were two stalkers, a neighbour, perhaps – you might have felt slightly disappointed.
But who emerged victorious?
Paul was highly suspicious of the repairman and took it upon himself to steal a briefcase from his house, which Huw believed contained irrefutable proof that Patrick was the stalker. But yet again, he was one step ahead.
This time, however, she wasn’t so lucky and her bloody corpse was uncovered by the police.
Patrick also very nearly succeeded in framing Huw for Paul’s murder. He used one of the ex-detective’s kitchen knives to fatally stab him while Huw, who was the first to discover his body and subsequently ended up covered in his blood after trying to save him, was led away in handcuffs.
Thankfully, Huw’s former colleague Jenny arrived just in the nick of time to prevent any physical harm coming to her. But once again, Patrick evaded capture.
Yet, all was not lost. His attack on Margot meant that Huw, who was being held by the police, had very clearly been framed and was subsequently released, leaving him free to bring that son of a gun down.
It was at that moment that Jenny, along with some backup police officers, burst into the room and arrested Patrick, in turn bringing The Ripton Stalker's reign of terror to an end.
When we last left him, he was lying in his wife's arms while they waited for the paramedics to arrive, but it didn't look good.
After the horror he's endured, a happy and peaceful retirement is the least he deserves. But the expression on both Huw and Alice's faces suggest that he may well have reached the end of the road.
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