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All Seasons

Season 1

  • S01E01 The Rheidol Valley

    • May 6, 2025
    • BBC One Wales

    Iolo Williams explores the Rheidol valley and looks for elusive pine martens. He’s also treated to views of red kites nesting in a village and explores a remote zinc mine.

  • S01E02 The Dyfi Valley

    • May 13, 2025
    • BBC One Wales

    Iolo Williams explores the Dyfi Valley, from the Ynyslas dunes and the Cors Fochno bog to ospreys at Cors Dyfi and wild beavers near Machynlleth.

  • S01E03 The Conwy Valley

    • May 20, 2025
    • BBC One Wales

    Iolo explores fascinating woodlands, searches for curlew chicks and uncovers the history of an ancient burial chamber nestled in the beautiful Conwy valley.

  • S01E04 The Vale of Clwyd

    • May 27, 2025
    • BBC One Wales

    Iolo Williams explores the Vale of Clwyd, from coastal lizards and rare butterflies to a tame raven and elusive red squirrels, uncovering the valley's hidden wonders and wildlife.

Season 2

  • S02E01 Usk

    • May 6, 2026
    • BBC One

    Iolo Williams explores the Usk valley, from Newport’s urban wildlife to ground-nesting birds, a huge lesser horseshoe bat roost and scarce firecrests.

  • S02E02 Tywi

    • May 13, 2026
    • BBC One

    Iolo Williams explores the Tywi river valley, from Llansteffan’s coastal dunes to fallow deer ruts, ancient oak woodlands, and the remote heights of the Tywi Forest.

  • S02E03 Teifi

    • May 20, 2026
    • BBC One

    Iolo explores the Teifi river valley, and finds a slow worm hunting, meets a coracle fisherman, is thrilled by a fishing Otter, and watches a pair of kestrels at their nest.

  • S02E04 Dee

    • May 27, 2026
    • BBC One

    Iolo explores the stunning Dee valley, from wintering birds along the estuary, to displaying black grouse on moorland, rare freshwater-pearl mussels, and spawning sea trout.