In 1964 the British popstar Dusty Springfield went on tour in apartheid South Africa. She said she would only play to racially mixed audiences but the authorities didn't approve. She was forced to leave the country before she had finished her tour.

Photo: Dusty in 1964 - BBC.

In the 1990s it became clear that a brain disease could be passed from cows to humans. The British government introduced a ban on beef on the bone. But for some people it was too late, members of their families were already sick.

Photo: BBC.

In December 2003 Colonel Gaddafi announced Libya was giving up trying to make weapons of mass destruction. United Nations weapons inspectors were immediately sent to Tripoli to check. One of them has been speaking to Witness.

Photo: AFP/Getty Images

It is 40 years since the last moon mission returned to earth. One of the three astronauts on board was geologist Harrison Schmitt. He looks back on those moonwalks, and the discoveries they made.

Photo credit: Harrison Schmitt/Science Photo Library.

In 1912, Britain's top paleontologists were tricked by one of the biggest hoaxes in scientific history - a skull thought to be the "missing link" in human evolution.

The remains were discovered in a gravel pit in rural Sussex and became known as Piltdown Man.

Witness tells the story of the hoax using contemporary accounts of what happened.

The programme also hears from Dr Miles Russell of Bournemouth University, author of 'Piltdown Man: Case Closed'.

Presented and produced by Simon Watts.

First broadcast on BBC World Service December 2012.

How exiles from the Nazis helped British intelligence listen in on German prisoners-of-war.

Ninety-three-year-old Fritz Lustig, a refugee from Nazi Germany, is one of the last surviving members of the secret "M Room".

He helped glean vital information from German POWs about Hitler's war machine.

Photo: Sgt Fritz Lustig, circa 1942 (courtesy of Lustig family)

Twenty years ago a former economist from France, Franck Goddio, began underwater excavations which unearthed a 2000 year old palace belonging to Cleopatra.

PHOTO: A diver eye-to-eye with a sphinx.

In the late 1960s a young black American woman rolled up in 'Swinging' London. Although Marsha Hunt says she couldn't sing, she ended up a star in a West End musical - Hair. And she had an affair, and a daughter, with Mick Jagger of the Rolling Stones.

Photo: Associated Press

In 1992, a Paraguayan human rights activist called Martin Almada discovered a huge cache of documents in a run-down police station.

The files showed the true extent of repression during the long military rule in Paraguay of General Alfredo Stroessner.

And what became known as the "Archive of Terror" also proved that military dictators across South America had swapped prisoners and intelligence in an Operation codenamed Condor.

Witness speaks to Martin Almada and the Paraguay expert, Andrew Nickson.

PHOTO: AFP/Getty Images

The story of the 1992 film which launched Nigeria's hugely successful movie industry.

It was called "Living in Bondage".

We speak to one of the stars of the film, Kanayo O. Kanayo.