Bettany Hughes' Treasures of the World (2021) : 1x2

The historian travels to Malta in search of ancient artefacts, and leads the first TV crew to be allowed to film in the Hypogeum, a recently discovered underground temple that provided a burial place for up to 7000 individuals. Before a major restoration project starts, Bettany is invited to film in the Queen and Prince Philip's romantic hideaway, the Villa Guardamangia, and explores in a series of underground tunnels from the Second World War.