Unforgotten Guest cast, played by Brid Brennan Episode 3x01: Episode 1 (Jul 15, 2018) Episode 3x02: Episode 2 (Jul 22, 2018) Episode 3x03: Episode 3 (Jul 29, 2018) Episode 3x05: Episode 5 (Aug 12, 2018) Episode 3x06: Episode 6 (Aug 19, 2018)
