Documentary series · BBC One Wales

Iolo's River Valleys

Name: Iolo's River Valleys
Genre: Documentary
Cast: Iolo Williams, Carys Peotto

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2025 –2 seasons · 5 episodes~29 min per episodeReturning series

Who's in it

Cast

The principal ensemble across the run of the series.

Iolo Williams

Self - Presenter

8 eps

Carys Peotto

Self

1 eps

The story

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

The run

2 seasons · 5 episodes.

Poster unavailableSeries 1
Season 1 · Complete
Series 1
20254 episodes
Iolo Williams explores four of Wales’s most stunning river valleys.
Poster unavailableSeries 2
Season 2 · Complete
Series 2
20264 episodes
Iolo Williams explores four of Wales's longest river valleys from sea to source.