The Great British Treasure Hunt Main cast, played by Henry Cole Episode 1x01: Episode 1 (Mar 14, 2022) Episode 1x02: Episode 2 (Mar 15, 2022) Episode 1x03: Episode 3 (Mar 16, 2022) Episode 1x04: Episode 4 (Mar 17, 2022) Episode 1x05: Episode 5 (Mar 18, 2022)