Season 1

1. Episode 1

Iolo Williams tracks Wales' rarest and most elusive mammal, the pine marten, and sees ospreys fishing in the Cambrian Mountains of mid-Wales.

2020-08-06 • 29 min

2. Episode 2

Iolo Williams looks for cuckoos in the Elan Valley, red squirrels genetically unique to the Cambrian Mountains, and golden plover on the hills surrounding Plynlimon.

2020-08-13 • 29 min

3. Episode 3

Iolo Williams tracks goshawks and finds remnants of prey and chicks in a huge nest. He also looks for rare nesting curlew and a stunning day-flying moth called the Welsh clearwing.

2020-08-20 • 29 min

4. Episode 4

In his final trek, Iolo looks for a bird you wouldn't expect to see in Wales as it is meant to be extinct here. But a golden eagle is secretly living in the Cambrian mountains.

2020-08-27 • 29 min