Where do you come from? Tracing your ancestry in the USA is one of the most popular hobbies along with gardening and golf. TV is awash with advertising for the do-it-yourself genetic testing kits which have become much sought after gifts, especially at Christmas time. The kits have revolutionised family tree research and gone are the days of sifting through old documents. But, as Lucy Ash reports, the DNA results are now revealing far more than many had bargained for. How do you react when you find out your mother had a secret affair half a century ago…and the man who raised you isn’t your dad? Produced by Charlotte McDonald.

China is accused of locking up as many as a million Uighur Muslims without trial across its western region of Xinjiang. The government denies the claims, saying people willingly attend special "vocational schools" to combat "terrorism and religious extremism". But a BBC investigation has found important new evidence of the reality - a vast and rapidly growing network of detention centres, where the people held inside are humiliated and abused. Using detailed satellite analysis and reporting from a part of the country where journalists are routinely detained and harassed; China correspondent John Sudworth offers his in-depth report on China's Hidden Camps.

An investigation into the 'killing machine' of one of Africa's most repressive and secretive countries. Three years ago there was widespread unrest in the East African country of Burundi when the country’s president ran for a third term. Protestors said he was violating the constitution that limits presidential terms to just two. Since then street protests have ended but a BBC investigation has now uncovered evidence of government sponsored torture and killings designed to silence dissent. The government has always denied any human rights violations, and declined to comment on the allegations in this programme. Reporter Maud Jullien. Producers Charlotte Atwood and Michael Gallagher.

*This programme contains graphic scenes of torture and killing.

(Image: A computer generated image of an alleged detention house in Burundi’s capital, Bujumbura. A red liquid, which looked like blood, was seen pouring from its gutter. Credit: BBC)

In a Cambodian hospital, a group of terrified new mothers nurse tiny babies under the watch of police guards. They're surrogates, desperately poor women promised $10,000 to bear children for parents in China. But they were arrested under new anti-trafficking rules, and now they face an agonising choice: either they agree to keep children they didn't want and can't easily afford to bring up, children who aren't genetically theirs - or they honour their surrogacy contracts, and face up to 20 years in jail. Tim Whewell reports on the suffering as country after country in Asia cracks down on commercial surrogacy - and asks whether the detained mothers are criminals - or victims.

Nigerian patients held in hospital because they can’t pay their medical bills.

In March 2016, a young woman went into labour. She was rushed to a local, private hospital in south-east Nigeria where she gave birth by caesarean section. But when the hospital discovered this teenage mother didn’t have the money to pay for her treatment, she and her son were unable to leave. They remained there for 16 months – until the police arrived and released them.

This is not an isolated case. In Nigeria, very few health services are free of charge, and campaigners estimate that thousands have been detained in hospitals for failing to pay their bills. It’s become an increasingly high-profile issue – one couple have been awarded compensation after going through the courts.

For Crossing Continents, Linda Pressly explores a widespread abuse – meeting victims, and the hospital managers attempting to manage their budgets in a health system under enormous pressure, where only 5% of Nigerians are covered by health insurance.

Producer: Josephine Casserly

(Photo: Ngozi Osegbo was awarded compensation by a court after she and her husband were detained in a hospital because they couldn't pay their medical bills. BBC PHOTO)

Simon Cox is in Austria where the authorities have launched an unprecedented operation against a new far right youth organisation, Generation Identity. They prosecuted members of the group including its leader, Martin Sellner, for being an alleged criminal organisation. They are currently appealing the judge's not guilty verdict. The Austrian group is at the heart of a new pan European movement that is vehemently opposed to Muslims and immigration. GI says it is not racist or violent. In Germany more than 100 offences have been committed by its members in just over a year. And the group's co leader in Britain stepped down after he was revealed to have a Neo Nazi past.

Simon Cox reporting. Anna Meisel producing.

The dark secrets of Chile's Catholic Church. El Bosque is the wealthy Santiago parish where Fernando Karadima, a charismatic priest, attracted hundreds of young men to the priesthood. In 2010, he was exposed as a paedophile after survivors revealed he had sexually abused them. The Vatican sentenced Karadima to a life of penance and prayer. But this was no one-off, rogue priest. This year the scale of Chile's abuse scandal has been revealed - multiple allegations of sexual exploitation and cover-up are now being investigated across this Andean nation, including allegations made by a congregation of nuns. At first Pope Francis failed to respond. Subsequently he was forced to send his experts in sex crime to Santiago to hear evidence. Most recently, bishops have resigned, and nearly a hundred priests are being investigated by Chile's prosecutors. For Crossing Continents, Linda Pressly travels to Chile to meet survivors of sexual abuse, whistle-blowers and devout Catholics, and explores a story that continues to haunt the Francis papacy.

Presenter: Linda Pressly

(Photo: Javier Molina, survivor of clerical sexual abuse. When he reported the abuse in 2010, the Catholic Church took no action.).

In parts of Nevada, prostitution is legal - the only such state in the US. The 'live and let live mentality' is a hangover from the gold rush days and in certain counties, brothels have been officially licensed since 1971. Today no fewer than seven of them are owned by one man, Dennis Hof, a gun-toting restaurateur, entrepreneur and reality TV star. He calls himself the "Trump from Pahrump," - after a town where he recently won the Republican primaries for the Nevada State Legislature. Now though, there is a backlash from religious and social activists who have managed to get a referendum on the ballot during this November's mid-term elections. Voters in Lyon County will be asked if the legal brothels there should be allowed to continue to operate - and ultimately, the campaigners aim to end legal sex work across the whole state. They say it is an exploitative, abusive trade and prevents other businesses from investing in the area. But some sex workers are worried that a ban could push them onto the streets where they would face potential danger. Lucy Ash talks to Dennis Hof, the women who work for him, and those who are pushing for change.

Producer Mike Gallagher.

'He was using prisoners like oxen for ploughing for his own gain'. An ex-convict recalls the prison officer in charge of the prison farm he worked on in Uganda. The country has one of the most overcrowded prison systems in Africa. It also has one of the continent's most developed systems of prison labour. For Crossing Continents, Ed Butler reports from Uganda where most of the country's 54,000 inmates are now serving an economic purpose, working for the benefit of an elite collection of private farmers and other business interests - even though half of them have not been convicted of any crime. He speaks to current and former prisoners, to find out how the system works, and asks: is the country breaking its international pledges on prisoner treatment?

Presented and produced by Ed Butler.

(Image: Prisoners at Patongo Prison, Uganda. Credit: David Brunetti).

When someone in Jamaica emigrates to the UK, it is said they have 'gone to foreign'. Over the past 70 years several hundred thousand Jamaicans have done this, following in the footsteps of the so-called 'Windrush generation' who first arrived in Britain in the late 1940s. But the spirit of adventure and optimism those early pioneers bought with them has changed over the years and a recent political scandal now finds some of them unwanted and rejected by Britain. Following changes to immigration law and failing to comply with citizenship requirements, they have been designated illegal immigrants. On returning from holiday in the Caribbean, some of the children of the Windrush generation (now in their 50s and 60s) have been refused entry back to Britain, and others have been deported from Britain back to the Caribbean. For Crossing Continents, Colin Grant travels to Jamaica to meet two men who, despite having lived in the UK for decades, working and paying taxes, find themselves in limbo, trapped and unable to return to the place they call home. What happens when you are stranded in a place you were never really familiar with, an island which you have little memory of, and may not have returned to for half a century? Grant hears of their endeavour to return to the UK and how they have struggled to keep up hope in the face of a very painful and public rejection.

Colin Grant reporting and producing.