Mania: When Heroes premiered in 2006, it quickly became NBC’s highest rated drama. The show was not only a ratings success but a critical success, earning numerous Emmy, Golden Globe, and People’s Choice Award nominations. But as hot as the show started, it cooled just as quickly. With the exception of the season premiere, every episode of season two was rated lower than every season one episode. Likewise, every season three episode was rated lower than every season two episode and so on with the fourth season.