Frank Skinner is one of Britain's most controversial comedians but even he felt the comments broadcast last year by Jonathan Ross and Russell Brand on BBC Radio went too far. As he experiments with reducing the expletive count in his own stand-up show, Frank sets out to discover if the Ross-Brand storm really was a watershed in broadcasting's debate about bad language and offence.

Jeremy Vine reveals the problem of sexual bullying in our schools and hears from experts, parents and teachers - but most importantly from the kids themselves - on what we can do to tackle it.

This moving film reveals the differing fortunes of a mother polar bear and a mother grizzly bear, and their new-born cubs, in a rapidly-changing world. The shrinking Arctic ice may be making life much tougher for polar bears, but it is offering new opportunities for grizzly bears to the south.

Tiger experts in Bangladesh have a problem: how can they encourage local people to protect the beautiful and endangered Bengal Tiger when these animals have developed a taste for human flesh?

Mark Meakin attempts to unravel the mysterious wanderings of the biggest fish in the sea.

Just how does the cuckoo trick other birds into accepting its eggs and raising its young? In this film, new photography is combined with archive footage and the latest scientific findings to solve a puzzle which, as narrator David Attenborough explains, has perplexed nature-watchers for thousands of years.

Coverage of President Obama's Inauguration, with Huw Edwards and Matt Frei in Washington.

Clive Myrie traces the life story of Barack Obama, America's first black president.From Obama's broken home childhood in Hawaii, through his political awakening in the rough neighbourhoods of Chicago, to his arrival in Washington, Myrie follows the extraordinary journey that transformed the son of a Kenyan student into the most powerful man in the world.

Jonathan Dimbleby explores ten thousand miles of one of the world's most awe-inspiring countries. Summer 2006. Having lived through the Cold War, Jonathan makes his first stop in the city of Murmansk, which stands as a reminder to the years when England and Russia were close allies in a war of survival against the Nazis.

The unexpected marriage of high-tech glamour with the gritty reality of 1970s Northern Ireland captured the public's imagination but this early optimism would end in failure. Although the cars looked great, the windows leaked and the engines seized; as his financial problems mounted the maverick DeLorean faced charges of drugs trafficking. Adrian Dunbar narrates the story.

Jimmy Doherty, pig farmer, one-time scientist and poster-boy for sustainable food production is on a mission to find out if GM crops really can feed the world.

We are in the grip of an allergy epidemic. 50 years ago one in 30 were affected, but in Britain today it is closer to one in three. Why this should be is one of modern medicine's greatest puzzles.

Margo MacDonald, the firebrand, independent politician, is one of Scotland's most popular public figures. But she also has Parkinson's Disease and, earlier this year, she spoke openly of her desire to choose the moment of her death. Now, in this deeply personal film, she uncovers the truth about assisted dying, meeting those with illnesses like hers who are desperate to die, and exploring how British law could be changed to allow them to choose when they can.

Following on from the BAFTA-shortlisted Panorama programme Taking on The Taliban, Ben Anderson catches up with 24-year-old Lance Corporal Jack Mizon of the Queen's Company, Grenadier Guards.

Controversial celebrities of the 20th century. Jazz singer Billie Holiday is remembered today for her turbulent personal life as much as for her artistic achievements - addicted to drink, drugs and abusive men, the enduring image is of a tragic victim. However, archive footage and interviews with friends reveal a different Lady Day - a strong woman, determined to satisfy her voracious appetite for sex, drugs and music.

Cork producer and wildlife enthusiast Francisco Garrett explains what will be lost if cork stoppers are replaced by plastic or screwtops.

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.