Profile

The last couple of weeks of the election campaign - and the erroneously narrow polls which highlighted the role of The Queen in the event of a hung parliament - brought to the attention of the public a man who has held arguably one of the most important jobs in Britain since 2007, but who remains largely unknown. He's Sir Christopher Geidt, Private Secretary to The Queen. He is her adviser on political and constitutional matters, and her line of communication to the Government. But who is he?Presenter: Mark Coles Producers: Joe Kent and Charlotte Pritchard.

Earlier this week, Loretta Lynch was sworn in as the new US Attorney General. Brought up in North Carolina the daughter of a Baptist minister father and a mother who picked cotton as a young girl, Lynch is the first black woman to hold the position of the nation's top law enforcement official. Harvard-educated Lynch worked at several private law firms and has been a federal prosecutor, winning high-profile cases against corrupt New York lawmakers, sex traffickers and mafiosi. But there has been criticism, too. She is accused of being soft on Wall Street wrongdoing. Edward Stourton has been speaking to people who know her well.Producer: Chloe Hadjimatheou.

Mark Coles profiles Aidan Turner, the Irish actor who stars in Poldark, the BBC's most successful drama for a decade. Turner has won legions of fans as the brooding, scythe-wielding Cornish hero in the classic costume drama remake.Producers: Ben Crighton and Chloe Hadjimatheou.

With five World Championship titles already under his belt, Ronnie 'The Rocket' O'Sullivan will compete in Sheffield this weekend hoping to secure a sixth. He is seen by many as the greatest snooker player in history. O'Sullivan arrived on the professional snooker scene when he was just a teenager, and immediately caused a storm. His talent was never in doubt. When on form, he is unbeatable. But his public battles with alcoholism, drugs and depression have plagued him throughout his career. Which Ronnie will be on display at the Crucible over the next few weeks? Presenter: Mark Coles Producers: Hannah Barnes and Ben Crighton.

We learned this week that Jane Horrocks, Jim Broadbent and Fearne Cotton are to voice a new run of the hit children's TV series Teletubbies. It's estimated that around a billion children in over 120 countries have watched Teletubbies but there have been no new episodes since 2001, and the imminent return of Tinky Winky, Dipsy, Laa-Laa and Po has made news around the world. But who, or what, are the Teletubbies? And why have they proved such an enduring cultural phenomenon?Presenter: Becky Milligan Producers: Ben Crighton and Hannah Barnes.

This week Comedy Central announced that South African comedian Trevor Noah is to take over from Jon Stewart as host of The Daily Show.It was a surprise to many that a relative unknown was set to take on one of America's leading talk shows, but Noah's star has been rising fast in recent years.Already a well-known face on British TV and radio, thanks to his award-winning Edinburgh Fringe show back in 2012, the 31-year-old has certainly shown the confidence to take on one of TV's biggest jobs - critics might call it arrogance.Young, good looking, mixed race - Noah is said to be an ad-man's dream, and it's said Comedy Central will be looking to cash in on his global appeal. However, his reputation has already been slightly tarnished as the media began to dig into his Twitter feed and found some distasteful jokes.Noah said he shouldn't be judged on gags which didn't land, and his new bosses backed him up - but whether those same execs will be quite as forgiving once he takes the hotseat is yet to be seen.Trevor Noah says he is a fan of rollercoaster rides. He loves them so much, he often builds his comedy tours around cities that have the biggest rides. His fantasy is a chair that spins while doing a 360 degree loop and a backwards somersault.Stepping into Jon Stewart's shoes just might provide his scariest ride yet.Presenter: Mark Coles Producer: Richard Fenton-Smith.

On Thursday evening seven party leaders will meet in an ITV studio for the much-anticipated general election debate. Some of them are - it's fair to say - rather less well known than others. Many viewers - in England, at least - will not know all that much about Leanne Wood, the Plaid Cymru leader. So, on Profile this week, Mark Coles has been finding out what makes her tick.Producer: Gemma Newby.

Italy's famous couture couple Dolce & Gabbana have fallen out with Elton John over off-colour comments they made about IVF babies and gay families. But they have no shortage of fans. Becky Milligan profiles the characters behind one of the world's greatest - and most valuable - fashion empires.Producer: Chloe Hadjimatheou.

Mark Coles profiles the DUP's leader at Westminster, Nigel Dodds, one of a number of possible post-election kingmakers. Dodds, furious to find his party excluded from the leaders' debates, is now being watched carefully to see which - if any - other parties he might support in coalition. Nigel Dodds is conservative and religious. He is opposed to gay marriage and abortion and believes Britain would be better off outside of the EU. But does that really tell us where he might put his support?Producer: Smita Patel.

Iraqi army and militia forces are fighting to take back Tikrit from the so-called Islamic State. Pulling the strings on the Iraqi side is an Iranian: Major-General Qassem Suleimani, the 'shadow commander' who has been described as the single most powerful operative in the Middle East. As the leader of the foreign branch of Iran's Revolutionary Guards - the Quds Force - Suleimani has emerged as Iran's leading foreign strategist. He has been arming and training Bashar al-Assad's military in Syria and leading the Shia militias fighting ISIS on the frontline in Iraq - where the US blames him for countless attacks on American soldiers. He has the ear of the supreme leader and has been influencing politics from Yemen to Bahrain. Mark Coles tells his extraordinary story.Producer: Chloe Hadjimatheou Editor: Richard Knight.