BBC Four HD

Programmes start at 7.00pm.

Liz McIvor recounts the tales of the men who built the canals - the navigators or navvies - focusing on their work on the Manchester Ship Canal.

Rugby legend Gareth and wife Maureen visit their top family holiday spot, St Davids.

For a long time we've known that plants can move, but recent studies reveal other secrets.

The Eden Project is a world of different habitats created in a single Cornish quarry and probably the unlikeliest place to find the robin. So why have they set up home there.

Documentary series with explorer Bruce Parry, who this week treks into the high mountains in the tiny Himalayan kingdom of Bhutan to live with the isolated Layap people.

A ballet celebrating the centenary of the birth of artist LS Lowry, inspired by his industrial landscape paintings. Starring Christopher Gable and Moira Shearer. From 1987.

Sam Willis looks at how castles survived into the Tudor era. But these strategic seats of power had to become palaces to impress monarchs such as Elizabeth I.

Art critic Matt Collings explores the most famous equations in science and realises that concepts of beauty and elegance have been used by many scientists to advance their work.

Liz McIvor recounts the tales of the men who built the canals - the navigators or navvies - focusing on their work on the Manchester Ship Canal.

Documentary series with explorer Bruce Parry, who this week treks into the high mountains in the tiny Himalayan kingdom of Bhutan to live with the isolated Layap people.

Sam Willis looks at how castles survived into the Tudor era. But these strategic seats of power had to become palaces to impress monarchs such as Elizabeth I.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Liz McIvor explores how the nation's canals were saved following years of postwar neglect, becoming places of tranquillity and popular for boating holidays.

Gareth and Maureen enlist in tank school and gear up for a drive like no other. In the Brecon Beacons, they discover if they've finally cracked the art of narrowboating.

Celebrating the 50th anniversary of a great Scottish landmark, the Forth Road Bridge.

Murder, conspiracy and espionage are the thrilling themes of Buchan's gripping adventure novel set against the backdrop of WWI. BAFTA-nominated actor John Hannah reads.

A man is pursued by the police for a murder he did not commit and by an international spy ring for information he does not possess. Classic Hitchcock mystery.

Comedy drama based on the true story of 12 Yorkshire ladies who find a compelling way to raise money for charity: a nude calendar. Stars Helen Mirren and Julie Walters.