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In fact, many have said it's his best role ever, which is some praise given his lengthy career.
Clunes plays Detective Chief Inspector Sutton, who is tasked with tracking down one of the UK's most dangerous sexual predators, nicknamed 'The Night Stalker'.
In truth, the crimes were perpetrated by Delroy Grant, who operated a 17-year spree that left thousands of elderly people in London, Kent, and Surrey, living in fear between 1992 and 2009.
Martin Clunes is great in #Manhunt on ITV
- Freddie Hodkin :blue_heart: (@FreddieHodkin) September 20, 2021
I thought Martin Clunes was excellent in Manhunt.
- lomelindi12 (@lomelindi12) September 21, 2021
The second part of four episodes based on the diaries of Colin Sutton - portrayed by Clunes - airs tonight, and fans are already keen to see how the case will develop, and see Clunes throw himself into the role.
After the first episode aired last night, one person wrote: "Seen Martin Clunes in a lot of stuff since Men Behaving Badly but this detective in #Manhunt is easily his best role."
Another said: "Almost by accident ended up watching #Manhunt last night. It's very good, largely (though not entirely) because of the brilliant Martin Clunes."
A third simply commented: "Martin Clunes is seriously good in #Manhunt"
I watched that first episode of Manhunt: The Night Stalker last night with Martin Clunes and honestly not even lying it's one of the best performances I've ever seen.
- Levi Miah ' Cœur (@levimiah) September 21, 2021
Best TV by far at moment is #Manhunt #MartinClunes beer work ever, glad it's on daily as no way can wait a week
- Rodney Jackson (@ralpheboy) September 21, 2021
In real life, it is thought that Grant attacked potentially as many as 600 people before he was brought to justice.
They were aged between 68 and 93 and it was believed that some of his victims suffered from dementia at the time of the attacks.
In 2011, he was found guilty of 29 offences including rape, burglary, and sexual assault, He was sentenced to four life sentences and to spend at least 27 years behind bars.
By the time he was captured, many of those he'd harmed were already dead.
The show is a sequel to the 2019 series which told the real-life story of how the murder of Amelie Delagrange on Twickenham Green in 2004 was eventually linked to the murder of Marsha McDonnell in 2003 and the abduction and murder of Milly Dowler in 2002.
Speaking ahead of its release, the series' writer Ed Whitmore said that reading through the victims' accounts was an incredibly distressing experience.
He said: "When you read victim account after victim account and, at a certain point, you just have to put it down because the terrible thing is that so many lives of these elderly victims ended in the most awful circumstances.
"Although technically he wasn't a murderer, there's no doubt that he hastened their ends in what he did and there's no sort of redemption there.
"Many of the victims died before he was apprehended.
"So the awfulness of that I found particularly hard to bear [was] the injustice of it and just the sort of extraordinary fact that he was offended so, so regularly - not exactly the same streets, but he would reappear in the same streets and they just couldn't catch him."
Manhunt: The Night Stalker continues tonight at 9:00pm on ITV.
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