Including 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.

This episode looks at how laser scanning has brought a totally new dimension to the history of a quarry in North Wales. Plus, the rediscovery of a medieval fish trap in Fishguard harbour and an architect who built his ideal village at 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.

There's the house that time forgot near Raglan, a visit to the best preserved World War I training trenches at Penally in Pembrokeshire, and a look at new plans to open a visitor centre at Parys Mountain in Anglesey, once the biggest copper mine in the world.

The legacy of a Tudor lord who wanted to turn Denbigh into the capital of North Wales is investigated, and there's a visit to a spectacular cliff-top fort in Pembroke to look at how Iron Age people lived close to the edge. Plus, how Cistercian monks created Wales's first multinational sheep business.