BBC four

Dr Helen Czerski investigates the extraordinary science behind the sounds we're familiar with and the sounds that we normally can't hear. She begins by exploring the simplest of ideas: what is a sound? At the Palace of Westminster, Helen teams up with scientists from the University of Leicester to carry out state-of-the-art measurements using lasers to reveal how the most famous bell in the world

Documentary capturing pioneering images to exhibit the dazzling array of mysterious and wonderful creatures that live in China's most beautiful landscapes. The vast Tibetan Plateau is one of the world's most remote places and home to chiru antelopes, wild yaks, foxes and bears. It has a remarkable culture shaped by over one 1,000 years of Buddhism, while its mountains and glaciers provide a vital

In the last episode, Samira Ahmed travels to the crumbling ruins of an ancient walled city and goes back to when Persia faced her gravest threat, Genghis Khan. But from the death and destruction there emerged a golden age of Persian poetry and art. In the fabled city of Isfahan, Samira encounters the dynasty of shahs that succeeded the Mongols – the Safavids, who gave Iran a powerful new identity

In the last episode, Samira Ahmed travels to the crumbling ruins of an ancient walled city and goes back to when Persia faced her gravest threat, Genghis Khan. But from the death and destruction there emerged a golden age of Persian poetry and art. In the fabled city of Isfahan, Samira encounters the dynasty of shahs that succeeded the Mongols – the Safavids, who gave Iran a powerful new identity

Michael Portillo continues his railway exploration of the post-war Britain of his youth on a journey from London to Cambridge. He begins on the capital's South Bank, where during 1951 a Festival of Britain drew more than eight and a half million visitors to admire fantastical buildings designed to inspire and celebrate the best of British in art, science and industry. After a spin on the London Ey

England's south west peninsular is the nation's holiday jewel in the crown, with long sandy beaches, breathtaking sea cliffs, fishing villages, caravan and campsite parks, wild moors and tourist town hotspots. There are 630 miles of unbroken pathways, snaking along the coastlines of Dorset, Cornwall and Devon, which are part of the national trail network. Explorer Paul Rose embarks on a mammoth tr

Elevated to the highest governmental office in unusual circumstances, the Rt Hon James Hacker MP sets about implementing his dream of reshaping Britain, introducing a host of exciting reforms, reinvigorating the economy and cementing his place in political history as a bold public benefactor and inspiring leader. Nothing less than a root and branch upheaval of the stuffy Whitehall machinery will d

Elevated to the highest governmental office in unusual circumstances, the Rt Hon James Hacker MP sets about implementing his dream of reshaping Britain, introducing a host of exciting reforms, reinvigorating the economy and cementing his place in political history as a bold public benefactor and inspiring leader. Nothing less than a root and branch upheaval of the stuffy Whitehall machinery will d

Vanessa Collingridge examines the life of Elizabeth Tudor, with particular interest in how documentary television and the BBC has examined her legacy and interrogated her reign. Using Timewatch and other BBC archive stretching back over 60 years, Vanessa looks at her upbringing, her conflicts with her enemies including Mary, Queen of Scots, and her greatest victory against the Spanish Armada. The

The world could not keep its eyes off two athletes at the 1994 Winter Games – Nancy Kerrigan and Tonya Harding. Just weeks before the Olympics in 1994, at the US Figure Skating Championships, Kerrigan was injured by an unknown assailant. Harding's ex-husband had plotted the attack with his misfit friends to eliminate Kerrigan from the competition. Twenty years later, The Price of Gold takes a fres

Michael Portillo continues his railway exploration of the post-war Britain of his youth on a journey from London to Cambridge. He begins on the capital's South Bank, where during 1951 a Festival of Britain drew more than eight and a half million visitors to admire fantastical buildings designed to inspire and celebrate the best of British in art, science and industry. After a spin on the London Ey

England's south west peninsular is the nation's holiday jewel in the crown, with long sandy beaches, breathtaking sea cliffs, fishing villages, caravan and campsite parks, wild moors and tourist town hotspots. There are 630 miles of unbroken pathways, snaking along the coastlines of Dorset, Cornwall and Devon, which are part of the national trail network. Explorer Paul Rose embarks on a mammoth tr

Documentary capturing pioneering images to exhibit the dazzling array of mysterious and wonderful creatures that live in China's most beautiful landscapes. The vast Tibetan Plateau is one of the world's most remote places and home to chiru antelopes, wild yaks, foxes and bears. It has a remarkable culture shaped by over one 1,000 years of Buddhism, while its mountains and glaciers provide a vital

Michael Portillo ventures deep underground onto London's newest railway: the Elizabeth Line. Emerging into the sunshine in Bedford Square, he recalls the choking smogs which plagued the capital during the 1950s. Back on the Elizabeth Line, Michael travels east to Stratford to visit the Theatre Royal, Stratford East, where pioneering director Joan Littlewood produced groundbreaking plays such as Oh

England's south west peninsular is the nation's holiday jewel in the crown, with long sandy beaches, breathtaking sea cliffs, fishing villages, caravan and campsite parks, wild moors and tourist town hotspots. There are 630 miles of unbroken pathways, snaking along the coastlines of Dorset, Cornwall and Devon, which are part of the national trail network. Explorer Paul Rose embarks on a mammoth tr

Brian Cox looks at our attempts to answer one of the most profound questions we can ask – are we alone in the universe? With scientists sending space probes to the furthest reaches of our solar system and beyond, the scientific search for alien life has begun. Inspired by a childhood love of science fiction, Brian still hopes to hear from ET. In this film, he explains why this search deserves to b

Former Royal Marine and expedition leader Bruce Parry sheds the trappings of a western existence and journeys to meet some of the world's oldest and most remote tribes. Daring to go where other presenters fear to tread, he immerses himself in the traditions and practices of these indigenous people. In this series, he travels to the so-called 'Cradle of Mankind', the Omo Valley in Southern Ethiopia