Steph McGovern turns her attention to salt's role in our diet. She begins in Wales at the Halen Mon sea salt company, learning how they produce their salt from the waters of the Menai Straits, then moves on to learn more about the wide variety of artisan salts that have become so popular in recent years - from French Fleur du Sel to the beautiful pink Himalayan Rock Salt. She goes on to address the issue of salt and health.

The strangely-named investor state dispute settlement (ISDS) system is built into thousands of treaties between countries around the world. It is a key part of negotiations for a new trade and investment treaty between the US and the EU. Michael Robinson digs into the ISDS mechanism to find out these little-known lawsuits are threatening the democratic process.

India’s Parsi population is in steep decline. Now the government’s funding fertility treatment and advocacy to encourage the community to make more Parsi babies.

Steph McGovern sets out to explain the role of Salt in our history. She hears how it has taken root in our language, visits a chemistry class to find out about how it is produced and its importance to our physical well being. She talks to history professor Peter Wallenstein about the unexpected importance of salt in military strategy right up until the 20th Century.

In 1931, during the Depression, an unknown young black woman took her new-born son to a Pittsburgh orphanage. And so began jazz pianist Horace Parlan´s life. At the age of five, he was struck by polio and lost the use of three fingers on his right hand, yet somehow, against the odds, he managed a long career as a professional musician.

In Ukraine, whilst she reported on MH17, a miner gave the ID of a passenger to Natalia Antelava. A year on, she meets the passenger’s sister, and tries to find the miner.

Izzat Majeed could have retired quietly, but instead he formed the Sachal Jazz Ensemble.

Kuba Nowak lives in London’s East End, a fast-changing part of the city. He loves his street and his neighbours, many of whom have lived there most of their lives. Together they celebrate their community by planting trees, sharing produce from their gardens and holding regular street parties with food, music and dancing. Now rising property prices and new development mean the neighbourhood is changing so rapidly that residents scarcely recognise the place they live.

Denmark’s second city has been attracting attention for its project to prevent its young people from going to Syria to fight for Islamic State. Is the Aarhus Model working?