Hinterland (2013)

Set around Aberystwyth, this was filmed twice, scene by scene, in Welsh as Y Gwyll and in a mostly English version, so you can choose how much Welsh you hear. Richard Harrington's withdrawn DCI Tom Mathias works cases in remote farms, chapels and empty hill country of Ceredigion, where long silences say a lot. Three series; slow and moody rather than twisty.