Huw Edwards and the history detectives discover a lost church, search for the oldest castle gate in Europe and find out how the great engineer Thomas Telford built the highest aqueduct in the UK.

Huw Edwards and his team decipher the writing on a stone pillar, recreate what an iron age fort would have looked like and uncover an 18th century copper works.

This time, Huw Edwards and his team examine a Tudor house, a Roman theatre and a chapel.

Huw Edwards and his team interpret the strange humps and bumps in the Welsh uplands.

Huw Edwards investigates the case of the disappearing house near Holyhead and searches for a lost castle at Portmeirion.

Huw Edwards narrates a look at Stonehenge's link to the Preseli Hills, Swansea's medieval beginnings and bomb-damaged streets, plus the secrets of the highest house in Wales.

A look at how laser scanning helped uncover the history of a quarry in North Wales, the rediscovery of a medieval fish trap in Fishguard harbour and a visit to Llanfairfechan.

Discovering what may be a Roman villa in Mid Wales, uncovering the hidden secrets of a Renaissance ceiling at St David's Cathedral, and observing the preservation of a major sculpture at a leading Welsh college.

A look at the house that time forgot near Raglan, and a visit to the World War I training trenches at Penally in Pembrokeshire.

A look at the legacy of a Tudor lord who wanted to turn Denbigh into the capital of North Wales.