I love a drama, correction, I love a Welsh drama and back with a new offering for Sunday nights in May is a six-part psychological thriller Y Golau.

With an all star cast including Alexandra Roach (Killing Eve), Joanna Scanlan (Iaith ar Daith), Iwan Rheon (Misfits), Hannah Daniel (Un Bore Mercher/Keeping Faith), Siân Reese-Williams (Craith/Hidden) and Annes Elwy (Craith/Hidden).

Sharon Roberts, played by Joanna Scanlan, has never stopped grieving the loss of her daughter, Ela. Joe Pritchard (Iwan Rheon), a quiet, unassuming gardener, was arrested for Ela’s murder after her DNA was found at his caravan.

Alexandra Roach stars as Cat Donato (Picture: S4C)

Joe confessed to killing Ela but wouldn’t, or couldn’t, say why or what he did with her body.

Journalist Cat Donato (Alexandra Roach), originally from the same town as Ela, has always been obsessed by her murder. Ela had been part of her circle of friends but prior to her murder Ela had been ostracised over a silly teenage squabble, a fact that Cat has tried her best to forget.

The news of Joe’s parole hearing and the prospect of his release causes both women to confront the past and the part they played in Ela’s final days.

With so many questions unanswered, Joe’s return to the community could be a way to get to the bottom of the mystery once and for all. If Joe Pritchard did kill Ela, why did he do it, and where is the body?

A total Misfit for Iwan Rheon as Joe Pritchard (Picture: S4C)

Alexandra Roach said: “I was drawn to Y Golau as it’s a story of a woman coming home. I’ve felt the pull back to Wales ever since I left for college. It feels really special to be acting in Welsh again on Y Golau especially as it’s set in the area that I grew up. I’m so excited to bring this story and Cat Donato to your screen – and to showcase Sir Gaerfyrddin (Carmarthenshire) to the world.

Joanna Scanlan was brought up in Wales and has been learning to speak Welsh. Y Golau, which was filmed at locations in West Wales including Llandeilo, Llandovery and Carmarthen is the Bafta Leading Actress winner’s first role in the Welsh language.

Filmed in both Welsh and English Y Golau was co-produced by S4C, Channel 4, independent producers Duchess Street Productions and Triongl in association with APC Studios, and with the support of Welsh Government through Creative Wales. The English version will air on Channel 4 and All4

Y Golau will begin on S4C on Sunday, 15 May at 9.00pm and will also be available on S4C Clic and BBC iPlayer.