Britain's Secret Treasures Guest cast, played by Mary-Ann Ochota Episode 1x02: Episode 2 (Jul 17, 2012) Episode 1x04: Episode 4 (Jul 19, 2012) Episode 1x05: Episode 5 (Jul 20, 2012) Episode 2x01: Episode 1 (Oct 17, 2013) Episode 2x05: Episode 5 (Nov 14, 2013) Episode 2x08: Episode 8 (Dec 5, 2013)