Ceredigion

S2 E2: DCI Mathias is under pressure; his estranged wife, Meg, has turned up in Aberystwyth, and he’s under investigation by the IPCC following the death of Mari Davies. When a bus driver’s body is found shot on an isolated mountainside, the investigation provides a welcome escape for Mathias. The team have a suspect to question, but Mathias believes he is an unlikely killer.