Hidden Beneath the Cities uncovers the extraordinary worlds lying just below modern urban centers. Beneath the streets of stone, soil and concrete exist hidden realms shaped by survival, ritual and imagination. Episodes reveal Malta's Ħal Saflieni Hypogeum, with its 5,000-year-old burial chambers; Turkey's vast caves in Midyat, which sheltered whole communities; and Iran's qanats, which sustain desert life.

A British intelligence officer races against time to uncover a UK politician's potential ties with the Kremlin, risking her reputation and family, as a murder and election loom.

A chemistry teacher diagnosed with inoperable lung cancer turns to manufacturing and selling methamphetamine with a former student to secure his family's future.

In 1812, young British aristocrat Edmund Talbot travels by ship to Australia, and learns more about himself and about life than he had ever bargained for.

A British intelligence officer races against time to uncover a UK politician's potential ties with the Kremlin, risking her reputation and family, as a murder and election loom.

A chemistry teacher diagnosed with inoperable lung cancer turns to manufacturing and selling methamphetamine with a former student to secure his family's future.

In 1812, young British aristocrat Edmund Talbot travels by ship to Australia, and learns more about himself and about life than he had ever bargained for.

Japan's most famous fortune-teller, Kazuko Hosoki, once held the nation in her thrall. Was she a savior or a devil? Wealth, fame, romance she had it all. But what shocking, untold half-life lay behind it?

Follows DCI Joe Mottram, a star detective with the Metropolitan police who, after a personal tragedy, retreats to Capri in Italy with his daughter to stay with his Italian in-laws for the summer.

Japan's most famous fortune-teller, Kazuko Hosoki, once held the nation in her thrall. Was she a savior or a devil? Wealth, fame, romance she had it all. But what shocking, untold half-life lay behind it?