Louis Theroux joins the Philadelphia Police Department patrolling the most dangerous part of one of the most violent cities in America.

One of two contrasting views on immigration under the slot title 'Unwelcome Britain?'. The other is 'Immigration is a Time Bomb'

Short series of biographical films showing the debt Britons owes to pioneers of multi-racial Britain. Mary Seacole was an accomplished Jamaican nurse who, on deciding to help during the Crimean War, had to travel there at her own expense and risk because Florence Nightingale's organisation rejected her for being 'too dark'. One there, she saved the lives of thousands of British soldiers.

As the world swaps theories on global warming, Five Disasters Waiting To Happen looks at how some of the world's leading cities are dealing with the practical reality of climate change.

Father and son duo Peter and Dan Snow lift the lid on Britain's last taboo. We don't talk about it with our friends, and two-thirds of us keep it secret from our partner, but why are we all so secretive about what we get paid? Peter and Dan reveal who earns what in Britain, asking if the people who work the hardest get paid the most.

In this fascinating series, Nick Crane investigates eight epic and challenging journeys, following in the footsteps of our greatest indigenous explorers.In the 1930s and 40s, HV Morton undertook the first tour of Scotland in a motor car, creating a new type of travel writing.

Documentary celebrating the 50th anniversary of the first satellite, Sputnik, which launched the space age in 1957. The film explores how satellites have affected almost every aspect of our lives, from spy satellites and GPS transforming the military to the communications revolution kickstarted by Telstar. But recent events in China have revealed just how vulnerable we might be, for they suggest we might be on the verge of another new age, one of satellite terrorism.

China is a vast country with an astonishingly diverse landscape. Through unprecedented access, this six-part series reveals the little-known natural treasures and secret wildlife havens of China's wildest regions.

Documentary celebrating the triumph, tragedy and human comedy that was Manchester record company, Factory. Started by the late Tony Wilson, Alan Erasmus, Peter Saville and Martin Hannett in the late 1970s, it became known as the home of Joy Divsion, New Order and Happy Mondays and for creating the Hacienda club.

Documentary series. Dr Iain Stewart reveals the role natural forces have played in the creation of the planet Earth, beginning with volcanoes

Charts the golden age of 'photographic journeys' and how the use of colour slowly became a credible medium for 'serious' photographers.

Particle physicist and ex D:Ream keyboard player Dr Brian Cox wants to know why the Universe is built the way it is. He believes the answers lie in the force of gravity

A Panorama investigation earlier this year showed how paedophiles were using the internet to groom unsuspecting youngsters for sex.

Documentary that looks back to the furore caused by Princess Margaret's affair with Peter Townsend, a divorced commoner. Billed as a constitutional crisis, Margaret's dilemma was the first modern royal scandal which would shape the future of royal relations with the media. In 1955 she chose to sacrifice love for duty by ending the affair, but new evidence presented here suggests that hers was a needless sacrifice.

It is unique in the Roman World. A spectacular and complex stone barrier measuring 74 miles long, and up to 15 feet high and 10 feet thick. For 300 years Hadrian's Wall stood as the Roman Empire's most imposing frontier and one of the unsung wonders of the ancient world.

In the 1950s and '60s, one million Britons voluntarily migrated to what had been a former penal colony only a hundred years earlier. The Ten Pound Pom scheme to Australia was one of the largest planned migrations of the 20th Century.

Theoretical physicist and futurist Michio Kaku shows how, in the 21st century, artificial intelligence is going to become as ubiquitous as electricity, how robots with human-level intelligence may finally become a reality, and how we'll even be able to merge our minds with machine intelligence. As the challenges and choices are literally mind-bending, Dr Kaku asks how far we will ultimately go.

Since his breakout from the New Jersey Shore in the 1970s, Bruce Springsteen has produced both arm-pumping rock classics and introspective acoustic ballads. His lyrics talk of the struggles of working class America and are interwoven with a cast of intriguing characters. He has become one of the greatest American storytellers since Samuel Clemens.

The so-called Golden Age of Piracy (1689-1718) is a storybook of rogues who robbed and murdered on the seas of the New World. One character has transcended history and sailed into legend…

Elizabeth, Countess of Shrewsbury (otherwise known as Bess of Hardwick), was one of the most capable and ambitious women in Elizabethan England. Hardwick Hall has become her lasting monument and is full of coded references to her desire for one of her descendents to sit on the throne of England.

Dispatches reveals how key politicians at the heart of the vicious fighting in Somalia - described as the world's worst humanitarian crisis - enjoy incredibly close links to Britain.

Ancient, dramatic and full of bizarre animals, Australia is like no other place on earth. Wild Down Under explores the extraordinary landscapes and breathtaking array of strange and often dangerous wildlife that lives around this beautiful continent.

Ten years on from the Good Friday Agreement, Declan Lawn returns to Northern Ireland to see how far lives have changed.

Girls as young as 12 are being sold for sex by organised gangs on the streets of Britain, Gerry Northam investigates for Panorama.

Panorama's John Sweeney investigates the row behind Shaken Baby Syndrome following the conviction of childminder Keran Henderson.

Richard Bilton looks at the dilemma of whether to tackle vandals and teenage gangs or to surrender the streets and thus create more victims.

Jane Corbin returns to Iraq as Britain hands over security control for Basra Province and tells the story of the last British fight in southern Iraq.

This is the remarkable story of two baby elephants struggling to survive their first six months in the oldest desert on earth. The desert elephants of Namibia suffered a 'poaching holocaust' in the 1980s. As the most endangered elephant population in the world recovers, every calf is vital.

This is the moving true story of a man who came to New Mexico in 1893 to kill a wolf but ended up saving the American wilderness instead. Ernest Thompson Seaton's epic duel with the wolf that he called Lobo became a pivotal moment in American history. Based on the personal diaries of Ernest himself and incorporating dramatic early footage, this film presents the methods he used to track wolves and to finally catch the big prize, Lobo himself.

This fascinating programme takes you deep into the secret world of the badger, following one family throughout the course of a year. Explore the habits, behavior and survival techniques of one of our country's most shy and elusive creatures.