Beyond the Line: North Wales Traffic Cops Main cast, played by Eiry Thomas Episode 1x01: Episode 1 (Jul 19, 2021) Episode 1x02: Episode 2 (Jul 26, 2021) Episode 1x03: Episode 3 (Aug 2, 2021) Episode 1x04: Episode 4 (Aug 9, 2021) Episode 1x05: Episode 5 (Aug 16, 2021) Episode 1x06: Episode 6 (Aug 23, 2021)