Interior Design Masters with Alan Carr Guest cast, played by Matthew Williamson Episode 1x01: Episode 1 (Aug 14, 2019) Episode 1x08: Episode 8 (Oct 2, 2019) Episode 2x08: Episode 8 (Mar 23, 2021) Episode 3x01: Episode 1 (Mar 9, 2022) Episode 3x08: Episode 8 (Apr 27, 2022)