The BEST episodes of Hinterland – Y Gwyll season 3

Every episode of Hinterland – Y Gwyll season 3, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Hinterland – Y Gwyll season 3!

Tom Mathias comes to Aberystwyth having abandoned his life in London. He's a brilliant but troubled man. Despite his faults he is an excellent detective, who knows that the key to solving the crime lies not in where you look for truth, but how you look. From the windswept sand dunes of the coastline to the badlands of the hinterland, Y Gwyll is a series of stories that are original and local, yet timeless and universal.

Last Updated: 7/22/2026Network: S4/CStatus: Ended
Aftermath
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#1 - Aftermath

Season 3 - Episode 1 - Aired 10/30/2016

The killing of a local minister leads DCI Mathias and DS Rhys to a remote mountain community.

A Poacher's Discovery
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#2 - A Poacher's Discovery

Season 3 - Episode 2 - Aired 11/13/2016

Mathias is on the case when the body of a young curator is discovered in a remote woodland.

Both Barrels
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#3 - Both Barrels

Season 3 - Episode 3 - Aired 11/27/2016

Following a fatal shooting, local man Llew Morris is the chief suspect.

Return to Pontarfynach
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#4 - Return to Pontarfynach

Season 3 - Episode 4 - Aired 12/18/2016

DCI Mathias investigates the death of Catrin John, convicted killer and former resident of the Pontarfynach Children's Home. As Mathias and Mared investigate Catrin's death, they begin to suspect it might be linked to the death of former police officer Iwan Thomas. As Mathias delves deeper into the past, the pressure on him to close the case increases. Will Mathias toe the line or will he risk everything in pursuit of the truth?