Hinterland Guest cast, played by William Thomas Episode 3x03: Episode 3 (Nov 13, 2016) Episode 3x04: Episode 4 (Nov 20, 2016) Episode 3x05: Episode 5 (Nov 27, 2016) Episode 3x06: Episode 6 (Dec 4, 2016) Episode 3x07: Episode 7 (Dec 11, 2016) Episode 3x08: Episode 8 (Dec 18, 2016)