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?

Harvey Weinstein was once one of the most successful producers in Hollywood history, but beneath the glitz and glamour, there was a dark story of threats, bullying and allegations of sexual assault. As Hollywood prepares to celebrate the 90th Academy Awards, Panorama investigates Weinstein's spectacular fall from grace and the extraordinary efforts he made to silence his accusers. This one-hour special, co-produced with PBS Frontline, examines the complex web of lawyers, journalists and private detectives deployed to keep Weinstein's secrets hidden.