In 2007 Panorama made a programme in Blackburn, which was becoming segregated along ethnic and religious lines. Now Panorama has returned and found a town that is even more divided. Some parts of Blackburn are almost entirely Muslim Asian, while other parts are only lived in by white residents. This kind of social segregation has been described as a national crisis, despite decades of government policy aimed at bringing people together. So why do such divisions persist? Panorama visits one town to answer that question and illustrate the impact of social segregation on local communities.

Panorama investigates what Bitcoin is and what it means, going inside a Bitcoin mine in Iceland - where currency is made - and spending time with the Bitcoin millionaires of Silicon Valley. The programme also hears from others who have been scammed out of their life savings and investors who think the cryptocurrency is an enormous scam and that the writing is on the wall.

In Britain, and around the world, authorities are sounding the alarm that Bitcoin is too risky - is it too late, or too crazy, to try to become a Bitcoin millionaire?