In 1963, three young Welsh nationalists took up arms against the construction of a controversial dam.

The Tryweryn dam would flood a Welsh valley to provide water for an English city.

Photo: Protestors rally against construction of dam.

In 1986, four days of huge public protests brought down President Ferdinand Marcos of the Philippines. Kate McGowan, in Manila, talks to the leading Filipino novelist, Jose Dalisay, about the demonstrations. This edition of Witness was first broadcast in 2011.

PHOTO: A rebel soldier points his gun at a portrait of Ferdinand Marcos during the uprising. (ROMEO GACAD/AFP/Getty Images)

In 1963, a frustrated American housewife, Betty Friedan, published one of the key texts in feminist thought. With its call for women to leave the home and enter the workplace, The Feminine Mystique paved the way for the women's liberation movement and became a bestseller. It called for a shakeup of the job market with maternity pay and subsidised childcare. Jo Fidgen speaks to two of Betty Friedan's children, Johnathan and Emily. The programme also contains archive recordings of Friedan herself.

Photo: The Schlesinger Library, Radcliffe Institute, Harvard University.

In 1995, archaeologists in Egypt's Valley of the Kings made a remarkable discovery.

Alex Last has been speaking to Professor Kent Weeks, who led the team working on the lost tomb of KV5.

Photo: Surveying inside KV5. Copyright: Theban Mapping Project

In February 2003, international protests against plans for war in Iraq reached their height. Millions demonstrated in cities across the world, but some peace activists took things further by driving to Baghdad itself in a small fleet of buses. They planned to act as "human shields", protecting Iraqi civilians against the imminent bombing campaign.

Witness speaks to Joe Letts, a British bus driver who became one of the leaders of the campaign.

PHOTO: The "human shields" on their way to Iraq. (Getty Images)

In February 1942 Britain's stronghold in South East Asia fell to the Japanese. Tens of thousands of Commonwealth soldiers were taken prisoner. They were sent to prison camps across the region and set to work. Maurice Naylor worked on the Thai-Burma railway until World War Two ended.

In the 1990s, the Algerian military was locked in a brutal struggle with radical Islamists. Its estimated that more than 150,000 were killed. The conflict was marked by massacres of entire villages. We report on the massacre of Sidi Hamed.

(Photo: Women mourn victims in Sidi Hamed. Credit: AFP/Getty Images)

In February 1993, a two-year-old boy called James Bulger was murdered in Liverpool. CCTV pictures showed two 10-year-olds leading James from a shopping centre towards his brutal death on a railway embankment. Witness speaks to Superintendant Albert Kirby, the officer in charge of one of the most sensitive investigations in British police history.

PHOTO: Jon Venables and Robert Thompson, the killers of James Bulger. (Press Association)

It is fifty years since the suicide of American poet Sylvia Plath. Hear from the friend Plath stayed with the weekend before she died.

(Photo: Sylvia Plath. Credit: Rex Features)

It is 30 years since the Derby winner was abducted from a stud farm in Ireland. He was one of the most extraordinary racehorses of the time. Hear from one of the men who tried to help negotiate his release.

Photo: Shergar, with Walter Swinburn in the saddle. Press Association.