Krishnan Guru-Murthy visits Colombia to investigate the plight of some of the one million children fleeing poverty, hunger and medical shortages in Venezuela.

Unreported World goes undercover with a private detective agency in Delhi owned by a woman. The explosion in online dating and matchmaking apps in India has led to a huge rise in the number of private investigators tasked with exposing love cheats or checking out a fiance's suitability. However, as reporter Nelufar Hedayat and director Charlie Mole discover, some agencies are using questionable tactics in their attempts to uncover the truth.

Marcel Theroux travels to North Korea at a time of great change for the secretive nation and takes a tour around some of the sights and witnesses the Mass Games celebrating the DPRK's 70th birthday.

This documentary series offering the lowdown on hard-hitting issues from around the globe continues. Here, reporter Seyi Rhodes and director Eric McFarland visit Johannesburg to meet miners who are risking their lives to descend deep underground in South Africa's abandoned gold mines, hoping to scratch a dangerous living from whatever ore remains. With the mines controlled by violent gangs and surrounded by lawless settlements, the pair's miniature cameras capture the stark reality of life at the end of a gold rush.

Krishnan Guru-Murthy travels to El Salvador to reveal what life is like for deportees from the US who are sent back to the gang-ravaged country following Donald Trump's crackdown on illegal immigration. President Trump says his government's latest crackdown is aimed at removing criminals and illegal immigrants, in particular members of the notorious Salvadoran-American street gang MS-13. However, official figures show that an increasing number of those who are being deported have no criminal record.

Sahar Zand reports from Mauritania in West Africa, where young girls and women are being force fed up to 10,000 calories a day because, when it comes to marriage, big is deemed beautiful.