Sunday, 13 September 2015 - put it in your calendar now because Y Gwyll/Hinterland is back on S4C.

The second series of the ground-breaking, gripping crime drama, starring Richard Harrington as DCI Tom Mathias will be premiered in Welsh on S4C.

It will be broadcast in the prime drama slot of 9.00 on Sunday nights on S4C, with English language subtitles available.

Produced back-to-back in Welsh and English, bilingual versions will be broadcast on BBC Cymru Wales and BBC Four at later dates, yet to be announced.

A feature length Y Gwyll special broadcast on New Year’s Day on S4C has set the scene for the series, with DCI Mathias still very much in emotional turmoil as past demons come back to haunt him.

With his wife Meg, played by the BAFTA winning Romanian actress Anamaria Marinca, appearing out of the blue, the intrigue grows and grows.

The second series continues with four new cases over eight nail-biting 60 minute episodes.