Rageh Omaar investigates how immigration has affected Britain. Using Enoch Powell's explosive 'Rivers of Blood' speech as a starting point, Rageh explores whether the apocalyptic visions of 40 years ago have any basis in today's reality.

Documentary discovering how our medieval forebears built the wonders of their world.

This programme tells the story of the most extraordinary river in the world - the Ganges. Human life and nature bustle along her river banks, in a kaleidoscope of colour and energy in this dramatic BBC documentary.

A film revealing how political ambition fuelled the Windscale fire of 1957 and then dictated that the heroes of Windscale be made the scapegoats

Dan Cruickshank's visits Windsor Castle, the largest inhabited castle in the world. Inextricably linked to the monarchy through the ages, the castle has also served as a lunatic asylum and a mausoleum

The Conquest of Cold charts the attempts of many great names in science such as Francis Bacon, Robert Boyle, Michael Faraday and Antoinne Lavoisier to grapple with the perplexing mystery of cold.

Absolute Zero is the ultimate limit of cold – a Holy Grail as exciting for scientists as the North and South Poles were to the great polar explorers. The Conquest of Cold is an epic journey from dark beginnings to an ultra-cool frontier.

Dan Cruickshank takes a rewarding trip to Blenheim Palace. Sitting serenely in the picturesque landscape of rural Oxfordshire, the palace is actually a lavish monument to human pride and militarism.

Germaine Greer searches out the best and worst architecture in the East of England and explores options for the future of the region. This programme complements David Dimbleby's series "How We Built Britain"

Reviews the BBC's coverage of the Vietnam war

In 1932, the Nazi party obtained more votes than any other, with forty percent of all Germans choosing to vote for Hitler as their leader. Germany was crippled by losing the First World War and as Lawrence Rees' interviews reveal, economic chaos led many to seek a strong and extreme solution to their problems

Michael Palin travels to Japan, starting at the island of Sado where he meets the famous Kodd Drummers. From there he moves down to Tokyo and is shown around by Mayumi, an early Japanese Monty Python fan.

Michael Palin explores China, staying in the Governor's Castle in Qingdao where Mao slept, meeting the owner of a Chinese vineyard which produces Chardonay and having a street massage. He travels to Shanghai and then by train and boat to the Yangtse Gorge, where a huge engineering project to create a dam is in progress, which will flood the towns and areas in which he is now travelling. Third in the series

The programme asks whether the introduction of the contraceptive pill was a blessing or burden for women in the 1960s

Documentary, featuring specially commissioned research, which reveals for the first time what really happened during the eruption of the volcanic island Krakatoa in 1883

A look at British architecture and its design, influences and development over the centuries. Presented by English Heritage Chief Executive Simon Thurley, who sets out to demonstrate the uniqueness of British architecture and its links to the national character by visiting buildings as diverse as a secret military bunker in Dover and Holkham Hall in Norfolk

Horizon investigates evidence of human sacrifice practised by the Incas. Three mummified remains of humans have been found in the Andes and this programme follows anthropologist Johan Reinhard's search for more proof on the peak of Sara Sara in the Andes

A documentary series in which expert scientific testimony and stunning CGI visuals combine to create the most realistic perfect storms imaginable. This edition speculates on what could happen if a mega-tornado were to strike.

The earliest dinosaurs were pretty small. Eoraptor was only about 1 m long. However the plant-eating prosauropod, Plateosaurus, that appeared at the end of the Triassic period, was a harbinger of things to come.

About 20 million years before the appearance of the first dinosaurs, the biggest extinction the world had ever known had occurred. Towards the end of the Triassic, 220 million years ago, there was another extinction, which wiped out many of the non-dinosaurs including the dicynodonts such as Placerias and primitive archosaurs such as Postosuchus. It was after this that dinosaurs really started to radiate and diversify.

While dinosaurs were ruling on land, the sea was the dominion of an entirely different group of animals: the marine reptiles. The programme concentrates on these amazing creatures that were every bit as awesome as their counterparts on land.

This episode is set in the early Cretaceous, a time when the world’s continents were breaking apart. It follows an enormous journey made by a giant pterosaur and many different geographical regions are covered in the programme.

Wildlife documentary series in which naturalist Nick Baker hunts down some of the strangest creatures on the planet. Nick journeys to the Andes to seek out the giant 'saggy-skinned' Lake Titicaca frog, the world's largest aquatic frog

In 2001, four Pakistani Britons travel to Pakistan for a wedding and in a surge of idealism, decide to see the situation of war-torn Afganistan which is being bombed by the American forces in retaliation to the 9/11 terrorist attacks. Once there they are captured by Northern Alliance fighters. They are then handed them over the American forces who transport them to the prison camps at the Guantanamo Bay base in Cuba.

New archaeological research has given fresh insight into what happened in the Roman amphitheatre.

As Albert Einstein lay on his deathbed, he asked only for his glasses, his writing implements and his latest equations. He knew he was dying, yet he continued his work. In those final hours of his life, while fading in and out of consciousness, he was working on what he hoped would be his greatest work of all. It was a project of monumental complexity. It was a project that he hoped would unlock the mind of God.

It is said that once, the mighty King Solomon ruled an empire that stretched across the ancient world. According to Biblical lore, at the height of his powers he built the ‘First Temple’, the most magnificent building of its day, bedecked in gold, to house the Ark of the Covenant

In the early 1950's, oil geologists discovered the signs of a giant tsunami, half a kilometer high, that hit a remote bay in Alaska. After research, scientists concluded that the tsunami was created by a landslide in the ocean off the coast. Since then, scientists who study tsunamis have discovered several sites around the world where major under water landslides could create giant or mega tsunami

The documentary tells the story of the eruption from the point of view of assorted inhabitants of Pompeii and Herculaneum whose names and occupations are known, including a local politician and his family, a fuller, his wife, and two gladiators.

Olympian Jonathan Edwards narrates the story of Odysseus's hazardous journey back to Ithaca after the fall of Troy, including his encounter with Polyphemus, a one-eyed Cyclops