The Great British Bake Off: An Extra Slice Guest cast, played by Jonathan Ross Episode 4x03: Episode 3 (Sep 14, 2017) Episode 5x03: Episode 3 (Sep 14, 2018) Episode 5x08: Episode 8 (Oct 19, 2018) Episode 7x06: Episode 6 (Oct 30, 2020) Episode 9x06: Episode 6 (Oct 21, 2022) Episode 10x10: Episode 10 (Nov 30, 2023)