When an Ethiopian woman called Eleni disappeared amid the chaos of the Beirut blast there seemed little hope of discovering what had happened to her. In the wake of the explosion that devastated the Lebanese capital, rescuers searched through the rubble to try to locate hundreds of dead and missing people. As the death toll mounted, the only clue to Eleni’s fate was a pool of blood on her employer’s kitchen floor. It fell to two complete strangers - who had never met Eleni or each other - to try to solve the mystery using social media. Presenter: Reha Kansara Producers: Najib Deeb, Abiy Getahun & Yadeta Berhanu Editor: Ed Main Photo: Graphic showing a highlighted profile picture of a woman among lots of other social media profile pictures. Photo credit: BBC

If a lazy student in London or New York goes online to pay somebody to do their essay, the chances are the work will actually end up being done by somebody in Kenya. So who are the African ghost writers who are paid to help wealthy foreigners fake their way to unearned success, and what do they think about what they do? Kenya has become a key hub in the international cheating industry, because it is an English-speaking country with a good education system, but where there are often limited economic opportunities, particularly for younger people. Thousands of people are making a living supplying faked assignments commissioned by unethical students in other countries, through websites mainly based in the US and Eastern Europe. Many of those employed to do this work are students themselves. Although essay selling offers some a route out of poverty, universities say it is increasingly undermining the integrity of education around the world. And there are calls, even from within Kenya, for action against this booming online industry. Presenter: Reha Kansara Producer: Michael Kaloki Editor: Ed Main Photo: Graphic of hand writing an essay while another hand takes it and offers cash Photo credit: BBC

Could your favourite song be used to cover up the misdeeds of the police? Officers across the US have been filmed playing music - out loud - on their phones in public. They weren’t hoping this unusual display would make them go viral on social media. In fact, the aim was quite the opposite. Some officers believe that by blasting music while being filmed, the videos would get blocked by automatic copyright protection software and activists wouldn’t be able to post them online. Should we be concerned by these attempts to evade scrutiny by gaming technology, and do they even work? Presenter: Sam Judah Editor: Ed Main Image: A graphic of a police officer with a mobile phone in his breast pocket blaring out music. Image copyright: BBC

Nesara is a decades-old conspiracy theory whose followers believe all their debts will be magically cancelled in a radical reset of the world’s economic system. It’s a bizarre and baseless idea whose promoters peddle a vision of a financial neverneverland that is always just round the corner. Many of those who get sucked in, develop an almost cult-like belief in Nesara that inspires them to make horrific financial decisions that they think will make them rich. It’s a fantasy whose real life impact is dividing families and ruining lives. So why during the Covid-19 pandemic has Nesara become more popular than ever? Presenters: Jonathan Griffin & Shayan Sardarizadeh Additional reporting: Olga Robinson Editor: Ed Main Photo: A graphic of a banknote with an N at the centre. Photo credit: BBC

Think you’re safe being an anonymous TikTok troll or cyber bully? Think again. The Great Londini could be your worst nightmare come true. You might think you’re anonymous - but if you leave a threatening, racist or homophobic comment on someone’s video, Londini will find out who you are. If you’re a kid, he’ll contact your parents or your school. If you’re an adult, he'll really tell on you. In just a few months, the mysterious online vigilante has gained a huge following for his efforts to clean up TikTok. Londini says he’s doing the job that the platform should be. But does social media need moderation vigilantes - or are they a problem in themselves? Presenter: Sophia Smith Galer Editor: Ed Main Photo: The Great Londini Photo credit: BBC