The Caspian Sea is the largest inland body of water in the world. Bordered by Kazakhstan, Russia, Iran, Turkmenistan and Azerbaijan it spans 371,000 square kilometres and bridges Europe and Central Asia. It’s fed mainly by Russia’s Volga and Ural rivers and the sea is not only rich in oil and gas but is also home to numerous rare and endemic species, including the Caspian seal and 90% of the world’s remaining wild sturgeon. But the Caspian Sea is in crisis. Climate change and the damming of Russia’s rivers are causing the coastline to recede at an alarming rate. The sea’s levels have fallen by a metre in the last 4 years, a trend likely to increase. Recent studies have shown that the levels could drop between 9 and 18 metres by 2100. Last June Kazakh government officials declared a state of emergency over the Caspian. Iran has also raised the alarm with the UN. Antonia Bolingbroke-Kent travels to Kazakhstan for Crossing Continents to report from the shores of the Caspian Sea on what can be done to prevent an environmental disaster.

Presented by Antonia Bolingbroke-Kent Produced by Caroline Bayley Editor, Penny Murphy Sound Engineer, Rod Farquhar Production coordinator, Gemma Ashman Dombyra played by Yelnar Amanzhol

In 1897 British colonial forces attacked and looted the ancient Kingdom of Benin in what is now southern Nigeria. Thousands of precious objects were taken including stunning sculptures made of bronze, brass, ivory and terracotta. Some were decorative, some were sacred. Known collectively as the Benin Bronzes, they were famed for their craftsmanship and beauty. The majority ended up in museums around the world. But ever since Nigerians have been demanding their return. The Bronzes became symbols of the wider global campaign for restitution by former colonial powers. Now finally, some have been handed back. For Crossing Continents, Peter Macjob travels to Nigeria to track the return of the Bronzes, and find out what it means for Nigeria to have these lost treasures come home.

Producer: Alex Last Studio mix: Neil Churchill Production coordinator: Gemma Ashman Editor: Penny Murphy

Last year in Italy the biggest anti-mafia trial in 30 years reached a climax. On the stand were the Calabrian ‘Ndrangheta: they are estimated to run 80 percent of Europe’s cocaine and to make more money in a year than McDonalds and Deutsche Bank put together.

With access to mafioso-turned-collaborator Emanuele Mancuso, journalist Francisco Garcia looks at why Emanuele went against his powerful family. What has this trial meant for the 'Ndrangheta? And has it changed life for Calabrians today? Producer: Ant Adeane Production Coordinator: Gemma Ashman Studio Manager: Neil Churchill Editor: Penny Murphy

It's a quarter of a century since Kosovo emerged from a brutal war, one which pitted local ethnic Albanians against Serbs. Twenty-five years on, the government in Pristina is pressing ahead with reforms that could reinforce its separation from Serbia. They include banning the use of Serb dinars and curbing the import of things like Serb medicines. Pristina says the moves are needed to curb illegality and tax-evasion. But they’ve brought widespread complaints from local Serbs who feel victimised. Is the government justified in claiming there’s a rising risk of violence, or are the restrictions themselves making this more likely?

Producer and presenter: Ed Butler Studio mix: Rod Farquhar Editor: Penny Murphy Production Coordinator: Gemma Ashman

For three decades Armenians ruled Karabakh – literally “Black Garden” – an unrecognised statelet inside neighbouring Azerbaijan. Many saw it as the cradle of their civilisation. But as Azerbaijan retook control last autumn, the entire population fled in just a few days. It was a historic catastrophe for Armenia. But the world barely noticed. How is Armenia coping with its loss? Can 100,000 refugees rebuild their lives? And will the cycle of hatred that caused the conflict ever be broken? Grigor Atanesian reports.

Produced by Tim Whewell Studio mix: James Beard Production Coordinator: Gemma Ashman Series Editor: Penny Murphy

Reggaeton’s the soundtrack to Puerto Rico. The globally popular music reflects what’s going on in the cultural and political scene of the Spanish-speaking Caribbean Island.

It started out as underground music in marginalised communities but was criticised for allegedly promoting violence and being too sexually explicit.

Reggaeton has since been used as an anthem to overthrow a local governor and a way to criticise the island’s complex relationship with the United States.

It’s also evolved from misogynist roots to reach new audiences in the LGBTQ community.

Jane Chambers travels to Puerto Rico to meet the people and hear the music which is both maligned and revered.

Presenter and Producer: Jane Chambers Field Producers: Hermes Ayala and Yondy Agosto Sound Mix: Neil Churchill Production Coordinator: Gemma Ashman Editor: Penny Murphy

Thousands of people every day are on the move across Mexico towards the border with the US. But for migrants, this is one of the most perilous journeys in the world: land routes are dominated by powerful drug cartels and organised crime groups.

In this episode of Crossing Continents, Linda Pressly hears terrifying stories of kidnap and extortion from those who have risked everything to enter the United States.

The US/Mexico border has become the most important battleground for Americans in this year’s presidential election, but it seems no one can stop the men with guns who operate with impunity south of the border in Mexico.

Producer/presenter: Linda Pressly Producer: Tim Mansel Producer in Mexico: Ulises Escamilla Sound: Neil Churchill Production Co-ordinator: Gemma Ashman Editor: Penny Murphy

Belarus has huge numbers of political prisoners - around three times as many as in Russia, in a far smaller country. Almost industrial scale arrests began after huge, peaceful pro-democracy demonstrations swept the country in 2020 after Alexander Lukashenko claimed a landslide victory in presidential elections. Mr Lukashenko has been in power for 30 years. Protestors said the result was a fraud, and that they’d been cheated of their vote. Almost four years on, the authorities are still making mass arrests.

Many of those detained are women. The most prominent woman prisoner, Maria Kolesnikova, a professional flute player, has been incommunicado for over a year, with no word at all reaching her family or lawyers.

Political prisoners are made to wear a yellow patch on their clothes. The women say they kept short of food and made to sew uniforms for the security forces, to clean the prison yard with rags and shovel snow. They speak of undergoing humiliating punishments such as standing in parade grounds under the sun for hours. Yet they also tell us of camaraderie and warmth in their tiny cells as they try to keep one other going. And women on the outside continue to take personal risks to help the prisoners by sending in food, warm clothes and letters.

Presented by Monica Whitlock Producers Monica Whitlock and Albina Kovalyova Sound mix Neil Churchill Production coordinator: Gemma Ashman Editor: Penny Murphy

While recent attention has focused on the Houthi rebel movement in Yemen, BBC correspondent Nawal Al-Maghafi investigates a different, hidden aspect of the country’s long civil war.

The conflict in Yemen began in 2014. It has led to the deaths of hundreds of thousands and created one of the world’s worst humanitarian crises. In 2015, a coalition formed by the United Arab Emirates and Saudi Arabia invaded Yemen. Its stated aim was to return the elected government to power, and to fight terrorism.

However, Nawal Al-Maghafi , from BBC Arabic Investigations has found evidence that the UAE has been funding a method of covert warfare in southern Yemen – assassinating those who have spoken out against the UAE’s operations in the country. Assassinations were initially carried out by a band of former American Special Forces operatives turned mercenaries, who were paid by the UAE. These extra-judicial killings, conducted in the name of counterterrorism, continue to this day. The UAE denies the allegations.

Reporter: Nawal Al-Maghafi Producer: Alex Last Sound mix: Rod Farquhar Series Editor: Penny Murphy Production Co-ordinator: Gemma Ashman Executive Producer for BBC News Arabic: Monica Gansey

Migration is high on the political agenda in countries across Europe, as the number of asylum seekers rises once more. As well as those who risk life and limb on flimsy boats in the Mediterranean, thousands more come via the Balkans, many of them through Turkey and across the border into Bulgaria. They don’t stay there long. Their preferred destinations are further west, Germany perhaps or Britain. And while the migrants’ stories have become well-known in recent years, we hear relatively little from the people who enable their journeys, the people smugglers.

For Crossing Continents, Nick Thorpe has been to the north-west of Bulgaria, where it meets Serbia to the west and Romania across the Danube to the north. There he meets two men who worked as drivers for a smuggling organisation, shuttling migrants from Sofia, the capital, to the border.

Presented by Nick Thorpe Produced by Tim Mansel

Campaigners on the tiny Caribbean island of Barbuda are locked in a battle over its development by foreign investors who are building exclusive resorts for wealthy clients. The development of Barbuda into a high-end tourist destination is supported by the government of Antigua and Barbuda, who say it’s essential to create jobs and for the economic future of the island. But others argue that it will fundamentally change the island’s ecology and unique way of life. Caroline Bayley travels to Barbuda for Crossing Continents to speak to both sides in the heated debate over the island’s future.

Photo: The pristine coastline on Barbuda's south coast, which has become the main focus for new luxury developments (BBC).

Reporter: Caroline Bayley Producer: Alex Last Sound mix by Rod Farquhar Production Coordinator: Gemma Ashman Series Editor: Penny Murphy