Witness

In 1984, Russian engineer Alexey Pajitnov invented the popular computer game Tetris. But it was not until American businessman Henk Rogers joined him that the game became an all-time favourite in video game consoles across the world. Chloe Hadjimatheou spoke to both of them about how the idea of the game originated and the challenges of exporting it from the Soviet Union. This programme was first broadcast in 2011.(Photo: Tetris 99. Credit: Getty Images)