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Iolo's River Valleys

Iolo's River Valleys (2025)

May. 06,2025

5.5

| Documentary

Iolo's River Valleys

Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife.

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Iolo's River Valleys

2025

Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife.

Seasons & Episode

Seasons 2 : 2026

4 Episode

Episode 1 - Usk

May. 06,2026

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

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Outcome

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Formula 1: Drive to Survive

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Monarch: Legacy of Monsters

Your Friends & Neighbors

CODA

The Gorge

Eternity

Episode 2 - Tywi

May. 13,2026

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.

Episode 3 - Teifi

May. 20,2026

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.

Episode 4 - Dee

December. 31,1969

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.

Seasons 1 : 2025

4 Episode

Iolo Williams explores four of Wales’s most stunning river valleys from sea to source, uncovering their hidden wonders and remarkable wildlife.