Description: Soviet nuclear physicist Valery Legasov (Jared Harris), Soviet Deputy Prime Minister Boris Shcherbina (Stellan Skarsgård), and Soviet nuclear physicist Ulana Khomyuk (Emily Watson) are some of the people who worked to stop radioactive material from spreading further during the 1986 nuclear disaster at the Chernobyl Nuclear Power Plant in this HBO/Sky co-production five-part miniseries.