The Great British Bake Off Guest cast, played by Mat Riley Episode 6x01: Cake (Aug 5, 2015) Episode 6x02: Biscuits (Aug 12, 2015) Episode 6x03: Bread (Aug 19, 2015) Episode 6x04: Desserts (Aug 26, 2015) Episode 6x05: Alternative Ingredients (Sep 2, 2015) Episode 6x06: Pastry (Sep 9, 2015) Episode 6x07: Victorian (Sep 16, 2015)
