10 Sci-Fi Sleeper Hits That Got So Much Better After Season 1

Throughout the years, many of history’s best science fiction shows have been instant success stories, showing just how immensely popular this genre has always been on the small screen. Many other great sci-fi shows, however, have been sleeper hits which may have started out quieter, subtler, and with relatively lower ratings; but as their run continued, they became hugely popular.