Bill Browder's fund made billions in the wake of the Soviet Union's collapse. But in the new Russia, the cost of doing business could be counted in more than cash. When Bill caught wind of widespread financial corruption in the country, he decided to act - making powerful enemies in the process. Vanessa Kirby unravels a story of money, power and terrible sacrifice. Would YOU challenge the powers that be? From SPYSCAPE, the home of secrets. A Cup And Nuzzle production. Series producer: Gemma Newby. Produced by Mariana Des Forges. Music by Nick Ryan. Correction: The original programme stated that Japan, Australia and New Zealand have all passed Magnitsky acts. It has been corrected to reflect that these countries are only debating passing Magnitsky-style acts.