Happy Valley Guest cast, played by Katherine Kelly Episode 2x01: Episode 1 (Feb 9, 2016) Episode 2x02: Episode 2 (Feb 16, 2016) Episode 2x03: Episode 3 (Feb 23, 2016) Episode 2x04: Episode 4 (Mar 1, 2016) Episode 2x05: Episode 5 (Mar 8, 2016) Episode 2x06: Episode 6 (Mar 15, 2016)