A fifth of Wales is designated national parkland - a breathing space for the people. Each park can be reached less than an hour's drive from practically any home in Wales. And yet how much do we know about these jewels in our environmental crown? Who are the guardians of our heritage in Pembrokeshire, Snowdonia and Brecon Beacons? Big Country tells the stories of the men and women who dedicate their lives to looking after our National Parks.

In episode two, nostalgia and sadness as the long-time evicted visit their childhood homes on a Pembrokeshire firing range. Jon and Sam help the Ospreys Choir as they plan to sing on top of a waterfall against all odds, and conservationist Paul finds his role on Mynydd Myddfai one of damage limitation. Eco warriors gather in force in the Brecon Beacons, and in Snowdonia wild goats are terrorizing the locals. Show less