Profile

Chris Bowlby profiles the South Korean pop star Psy, sudden global star whose Gangnam Style has topped the UK singles charts, and whose video is the most popular video ever on Youtube. How has a Korean star swept the world, what lies behind his success, and why is he now selling fridges? And how has the world's most closed society, North Korea, responded to the global Gangnam craze? Producer: Smita Patel.

Edward Stourton profiles Justin Welby, former oil executive and now Bishop of Durham, emerging as one of the most striking candidates for the post of Archbishop of Canterbury. He became a priest after a long business career, and has chaired an NHS trust along the way. When he was Dean of Liverpool he allowed bellringers to play John Lennon's 'Imagine' from the cathedral bells. He has visited Africa regularly, and played a key role in attempts to resolve disputes between parts of the Anglican Communion. So how has someone who has been a bishop for less than a year become a candidate for the top Anglican job? Those who know him, and have followed his career from inside and outside the Church, offer their insights. Producers:Smita Patel and Chris Bowlby.

It is Andy Murray's year: he missed out in the men's singles at Wimbledon but made up for it by winning an Olympic Gold by defeating Roger Federer in straight sets in the men's singles. Now the Scotsman has won his first grand slam in the US Open against Novak Djokovic. It has taken Murray grit and determination to get where he is. He has struggled with a fiery temper and his own demons as well as a problem with his knee which forced him to stop playing tennis for at least six months. He has also faced difficulties in his personal life. When he was eight, he attended Dunblane Primary School where lone gunman Thomas Hamilton killed 16 children and their teacher. His parents separated when he was around ten and his promise as a young tennis player took him to a tennis academy in Spain far away from home.Producers: Mark Savage and Arlene Gregorius.

Edward Stourton profiles Pete Cashmore, one of the world's most popular bloggers and tweeters, who founded the successful social media news website Mashable.He started it as a teenager in his bedroom in Scotland seven years ago and hired his first writer two years later. His company is now based in the US and employs 80 staff. His website attract millions of readers, and three million follow him on Twitter. The 27 year old has been described as "the Brad Pitt of the blogosphere".Cashmore is also one of the founders of the Social Good Summit, which takes place in New York this weekend to coincide with UN Week. The conference aims to connect people from all over the globe via social media. So will Pete Cashmore become a billionaire web entrepreneur and philanthropist? And what does he mean when he says he has been a "lifelong fan of unicorns"? Producers: Arlene Gregorius and Hannah Barnes.

The new Conservative party co-chairman Grant Shapps is a man with a colourful past. The former grammar schoolboy is a pilot, rapper and successful businessman - but he's also battled cancer and survived a near fatal car crash. Geeta Guru-Murthy profiles the pugnacious and sometimes controversial politician tasked with bringing home the Tory vote.Producer: Chris Bowlby.

Claire Bolderson profiles Frances O'Grady, soon to become the first woman to lead the Trades Union Congress. She hears from colleagues and close observers of the trade union scene about how she has risen so far, how she has dealt with the macho traditions of union leadership, and what kind of challenge she may mount to the government as austerity bites.Producers: Chris Bowlby and Anna Meisel.

If nine-times gold medal winner Lee Pearson adds a further three golds to his collection at the London 2012 Paralympics, he could surpass the modern era record haul of 11.Dressage champion Pearson was born with a condition called arthrogryposis which twisted his limbs.He won a Children of Courage medal in 1980 aged six, with Margaret Thatcher insisting on carrying him up the stairs of number 10.An outspoken character on various issues, including the levels of funding in disabled sport and the recognition that goes with it, Pearson has a 100% record in his field, having won gold in every event at every Games he has ever competed in.So what drives him? And how will he cope with the pressure knowing that if he continues his winning streak in London in the coming weeks, he will be one of the most successful Paralympians in history?Presenter: Gerry Northam Producer: Kate O'Hara.

The most senior official at the Home Office is resigning after a 33-year civil service career. Dame Helen Ghosh - who has led the department since January 2011 - will take up the role of director general of the National Trust. She is one of a number of permanent secretaries who have left the civil service this year. She said she was "torn about leaving" but the chance to work for the National Trust was "a rare opportunity". Dame Helen Ghosh has worked in Government since 1979 for both Conservative and Labour Ministers. Her tenure included controversy at Defra over the Rural Payments Agency and more recently at the Home Office with concerns over the Border Agency. Chris Bowlby assesses her career and the qualities that propelled her to the senior ranks in Whitehall and asks what they tell us about the approach she is likely to bring to her new role. Producer: Ian Muir-Cochrane.

British cycling is enjoying unprecedented success and cyclists are now household names. Dave Brailsford, the performance director of the British cycling team, has been widely credited with Britain's rise to the top. His winning methods include combining an encyclopaedic knowledge of the sport with an obsessive work ethic, relentlessly crunching numbers and other data in a constant quest for any competitive advantage, however small. But he's not just a numbers man. Ruth Alexander talks to those who know Brailsford, and finds out what motivates the quiet cycling supremo.Presenter Ruth Alexander Producer Ben Crighton.

With his trademark blonde hair and a reputation for colourful antics, Boris Johnson has had a seemingly unstoppable rise through the ranks of UK politics. After seizing a second term as London mayor earlier this year and thanks to the Olympic games coming to London, he's become firmly associated with the city on the world stage. But alongside his various careers as mayor, journalist, author and quiz show panellist, it seems his political prospects within the ranks of the Tory party also remain strong. Recent polls suggest a groundswell of support for him as a potential future leader of the party. James Silver charts the rise and rise of a unique politician.Producer - Gail Champion.