HBO's 'Chernobyl' Is the Top-Ranked Show of All-Time The five episode miniseries has a 9.7 star average rating on the movie and television database website, IMDB. Chernobyl is now ahead of Breaking Bad, Game of Thrones and Planet Earth II. 140,000 users have rated the show. The series is a dramatization of the worst nuclear power plant disaster in history. In 1986, reactor four of the Chernobyl nuclear power plant — located in the former Soviet Union — exploded during a safety test. The explosion released more that fifty tons of radioactive material into the atmosphere. Created by Craig Mazin, the series stars Jared Harris, Stellan Skarsgaard and Emily Watson.
