Hidden will return a for a third and final series, the BBC as confirmed.
Filmed in both English and Welsh, Hidden/Craith airs on S4C in Welsh and on BBC in English.
The third season will air on BBC One Wales on Wednesday, 16 March at 9PM and BBC Four on Saturday, 19 March at 9PM.
The new series of Hidden will see the return of Sian Reese-Williams as DCI Cadi John and Siôn Alun Davies as DS Owen Vaughan.
A teaser shares: “After a local man’s body is found in a remote river, DCI Cadi John gets embroiled in the case which bears the signs of a brutal and frenzied attack.
“Since we last saw DCI Cadi John, her relationship with pathologist Rachel West has flourished – despite the secrets Cadi keeps from her – and she relies on Rachel to help identify the cause of death.
“Nearby, a local labourer Siôn Thomas (Sion Ifan) returns home to his brother Glyn, who has Down’s syndrome. Siôn became Glyn’s carer after the tragic death of their mother years previously. Having perpetually been let down by the various systems that should have protected them, Siôn is frustrated and wants nothing more than to provide for his brother.”
BBC Cymru Wales Head of Commissioning Nick Andrews said: “Hidden has been a superb returning series for BBC Wales and fans of Cadi and co. will be thrilled that she’s back doing her thing. The production team at Severn has already pulled off two genre-defining series and this latest instalment will be no different.
“It’s terrifically dark, gripping and intriguing. If the scripts are anything to go by we’re in for another tasty slice of Cymru Noir.”
Series Producer Hannah Thomas added: “We’re delighted to be back with a third series of Hidden and are thrilled that so many of our cast and crew are able to join us on the journey.
“This series has been a real joy for us all to work on and we’re looking forward to being back in North Wales amongst the splendour of the landscape. As with previous series, we will be veering away from the traditional ‘whodunnit’ and asking the question ‘whydunnit’ as we explore the impact of a brutal murder on the wider community. DCI Cadi John will be back at the helm of the investigation, whilst simultaneously navigating changes in her personal life.
“Whilst the past year has thrown up many challenges for us all, we’re excited to be reacquainted with the characters that we’ve grown to love.”
You can watch the full first two series of Hidden on BBC iPlayer online here.