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The Worst Episodes of Iolo's River Valleys

Every episode of Iolo's River Valleys ranked from worst to best. Explore the Worst Episodes of 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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BBC One Wales
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Episode Rankings

  1. #1 Worst Episode
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    Iolo's River Valleys Season 1 Episode 1 - The Rheidol Valley
    0.0/10(0 votes)

    #1 - The Rheidol Valley

    S1:E1

    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.

    Director:Unknown
    Writer:Unknown

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  2. Iolo's River Valleys Season 1 Episode 2 - The Dyfi Valley
    0.0/10(0 votes)

    #2 - The Dyfi Valley

    S1:E2

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

    Director:Unknown
    Writer:Unknown

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  3. Iolo's River Valleys Season 1 Episode 3 - The Conwy Valley
    0.0/10(0 votes)

    #3 - The Conwy Valley

    S1:E3

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

    Director:Unknown
    Writer:Unknown

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  4. Iolo's River Valleys Season 1 Episode 4 - The Vale of Clwyd
    0.0/10(0 votes)

    #4 - The Vale of Clwyd

    S1:E4

    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.

    Director:Unknown
    Writer:Unknown

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Worst Episodes Summary

"The Rheidol Valley" is the worst rated episode of "Iolo's River Valleys". It scored /10 based on 0 votes. Directed by Unknown and written by Unknown, it aired on 5/6/2025. This episode scored 0.0 points lower than the second lowest rated, "The Dyfi Valley".