Series 4 poster
6 episodes

Hidden Treasures of the National Trust - Series 4

First aired May 15, 2026Season 4

Another look behind the velvet rope at some of Britain's beautiful and historic houses.

Episodes

A New Agatha Christie Mystery still

Episode 1

A New Agatha Christie Mystery

NR
May 15, 202659 min

The homes of two literary giants reveal personal treasures and the real people behind the pages.

The Duke, His Wife and Their Lover still

Episode 2

The Duke, His Wife and Their Lover

NR
May 22, 202659 min

Two great country houses reveal stories of extravagant Grand Tours, royal luxury and one of Georgian society's most scandalous relationships.

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Episode 3

Puffins and Pilgrims

NR
May 29, 202660 min

Preserving the legacy of St Cuthbert and a colony of breeding seabirds on the remote Farne Islands. And experts in Wales race to save a fragile Bible that shaped Welsh culture.

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Episode 4

Collectomania

NR
Jun 5, 202659 min

Caring for the curious collections at two of the National Trust's most unusual houses, from a boy's suit of samurai armour to stuffed birds and a living collection of rare sheep.

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Episode 5

Bobbins and Hobbit Holes

NR
Jun 12, 202659 min

Exploring workers' lives in the Industrial Revolution: a rare contract of a boy tied to a cotton mill is conserved, and final touches are made to Kinver Edge's rock houses.

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Episode 6

Top Secret Seedlings

NR
Jun 19, 202659 min

Preserving garden designer Gertrude Jekyll's legacy at one of the National Trust's newest properties, and at Nymans, celebrating the flamboyant set designer Oliver Messel.