Dublin Murders is 'about the terrible things we do when we think no-one can see us'

Sarah Phelps proves why she's the queen of gripping adaptations with a masterful screen reworking of Dublin Murders. Gemma Dunn finds out more about the series, filmed in Belfast and Dublin, from its creator and stars Killian Scott and Sarah Greene

Irish actors Sarah Greene and Killian who star in Dublin Murders, the upcoming BBC/RTÉ adaptation of Dublin-based US author Tana French's hit crime novels
Irish actors Sarah Greene and Killian who star in Dublin Murders, the upcoming BBC/RTÉ adaptation of Dublin-based US author Tana French's hit crime novels

SARAH Phelps is showing off her latest tattoo – in her own words "a rather clumsy hawthorn leaf".

The British screenwriter – best known for her work on EastEnders and various serial adaptations – admits it was in fact inspired by an episode of Countryfile.

"They were in Northern Ireland and they interviewed this guy who had a Marxist-Leninist cap, an amazing swoosh of grey hair and an anorak with loads of pin badges," she recalls.

"He was protesting about a motorway that was going to destroy a hawthorn tree, which was the 'magic fairy tree of Ireland' – [stating] 'If you cut it down, everything will be disrupted, you cannot upset the fates'.

"He won because at some deep, metaphysical level every person involved [must have] woken up at 4am and thought 'What if he's right?'" she quips. "What if you cut down that tree and all hell breaks loose? That was the thing that made me sit bolt upright."

Phelps is talking at the screening of her latest, and rather fitting project, Dublin Murders.

The BBC One crime thriller – drawn from American-Irish crime fiction author Tana French's compelling Dublin Murder Squad novels – is billed to deliver 'a dark psychological mystery with a taproot that drops deep down into Ireland's past, foreshadows the future and brings insight to its present'.

Set at the height of the Celtic Tiger financial boom, the eight-part series will focus on two murder investigations led by ambitious Detectives Rob Reilly and Cassie Maddox, played by Killian Scott and Sarah Greene, who lead a majority-Irish cast that also includes Tom Vaughan-Lawlor, Moe Dunford and Conleth Hill.

It was a huge undertaking for creator and writer Phelps, who opted to blend French's first two novels, In The Woods and The Likeness, into one text.

"I plaited them because the first one is all about Rob and Cassie as the baseline and then it's all about Cassie and another detective – and I thought, 'I don't want to do that!'" reasons the energetic writer, whose has written screen adaptations of everything from Agatha Christie and Charles Dickens to JK Rowling.

"This is about friendship, shared secrets and shared lives; it's about compromise and heartbreak and the dark places we go to and the things that scratch at the back of our skulls," she says.

"I put them together, so the consequences are overwhelming for both of them at the same time. When you say that out loud it sounds easy, but I was like... I've actually got to do it!'"

What can its lead stars tell us?

"It follows Rob and Cassie in Dublin as they investigate a murder in 2006," begins Scott (34) who, somewhat ironically, had to shield his own Irish roots to perfect an English accent for his part.

"And then, due to the location of the body, there's a suspicion, between themselves, that it might be connected to a historic case 20 years ago when three children went into the woods."

"The whole show is about their secrets," says Cork actress Greene (35). "They're thick as thieves and they're really good partners who finish each other's sentences. But I think they have a shared guilt of surviving.

"They both survived traumas in their pasts and that binds them together," adds the Penny Dreadful actor, who was nominated for an Olivier Award for her performance in the West End and Broadway productions of Martin McDonagh's The Cripple of Inishmaan. "They're each other's keeper of secrets and it might not be the healthiest of relationships between the two of them."

"There's an outsider quality to both of them," Scott says of their bond. "Rob is someone who's really disturbed but has been managing to keep a facade on it to this position alongside Cassie as a hotshot detective.

"It's a performance that's been very effective thus far, but it seems to be coming to a point now where that mask is beginning to crumble," reveals Scott, who rose to prominence in hit Dublin gangland series Love/Hate and who has also starred in Strike, the BBC adaptation of JK Rowling's Cormoran Strike detective novels. "It's about keeping things together but there's a breaking point."

And with high emotion, high action and a seven-month shoot that spanned Belfast and Dublin, it wasn't just the characters that needed a breather.

"We were very lucky in terms of the company of people we had; Sarah is wonderful and it was a very easy process," the Dubliner enthuses.

"But you do get to a stage where you're exhausted. Although that's not the worst place for an actor to be because they're turning off their critical brain and just doing it."

"I agree completely with Killian," adds Greene. "I felt completely satisfied by the work, but I was pretty broken by the end of it. I took two months off."

"Productions have their own energy, they become their own beast," Phelps joins in. "Over eight episodes and seven months, you've taken people who look like normal human beings and broken them into a thousand tiny pieces.

"The theory on this one [was] no-one is allowed to go to bed," she declares. "We are in this totally immersive world and we end these characters' stories at the end. We can't end one story in the middle and start another story, they've got to be plaited. There's no room to breathe."

She continues: "This world of the wood is immersive, and it holds these two characters in this bell jar which is not going to let them escape unless one of them punches through it."

So what's the overriding message?

"The world of Dublin Murders is part psychological thriller, part police investigation, with a shiver of modern Gothic," says Phelps, who has already shown interest in a second run.

"It's about the borderlands between memory and forgetting, madness and sanity, between the present and the voracious pull of the past," she states. "With taproots sunk deep into the oldest folk tales of children who go under the hill, fetches and feys.

"It's a story about the terrible things we do when we think no-one can see us, when we think we can get away with it," she concludes.

"It's a love story about the search for forgiveness, for some tiny shining tenderness to guide us home."

:: Dublin Murders starts on BBC One on Monday October 14. The series will also air on RTÉ and on Starz in the US and Canada.