On Assignment - Season 6

James Mates returns to Greece, three months on from the devastating fires which killed almost 100 people in the town of Mati. Rohit Kachroo is in Serbia attending a Russian-inspired 'military patriotic' youth camp that hopes to strengthen ties between this former Yugoslavian state and close friend and ally, Russia. Charlene White travels to Budapest, home of this year's EuroSkills Championships, to meet the British joiners, engineers and restaurant staff competing to be the best in Europe.

This time, as the NHS prepares to start offering a more accurate blood test for Down's Syndrome to expectant parents in England, Nina Hossain is in Denmark, where the same test has been available for a year. Nina explores a unique partnership between hospitals and families, which aims to provide more information about raising a child with Down's. Nearly thirty years after the city's last serious earthquake Geraint Vincent hears how San Franciscans are preparing for the next seismic shock. And Peter Smith travels to Berlin to explore 'Free Body Culture' and other intriguing aspects of the German phenomenon of 'Ostalgie' - the sentimental nostalgia for Communist East Germany.

Rageh Omaar travels to Genoa to investigate the collapse of the Morandi Bridge. Romilly Weeks is in Moscow, to find out whether the renewed popularity of medical leeches reveals problems in Russia's healthcare system. And as we approach the 100-year anniversary of the end of World War One, John Irvine travels from France to Belgium to find out whether many lives could have been saved in the final hours of the Great War.

Juliet Bremner travels to a small town in North Carolina, to meet troubled ex-soldiers enrolled in a Veteran Treatment court. A year on from the end of Mugabe's reign in Zimbabwe, John Ray returns to see just what has and hasn't change. And Tom Clarke visits 'Nemo's Garden' in Italy, where they're growing crops underwater. Could this be the future of farming in a world growing ever scarce of resources?

China was the first country in the world to declare internet addiction as a clinical disorder. Debi Edward visits one of the country's 300 treatment clinics, trying to cure patients with military-style bootcamps for children, teens and adults. Neil Connery travels to Madrid to meet Venezuelans who've fled the economic crisis in their country and Rageh Omaar explores the fascinating resurgence of Viking culture in Denmark.