Around the turn of the millennium, science fiction TV was undergoing a period of intense evolution. In the late 1990s and early 2000s, shows were turning towards a serialized format just as cable networks began taking bigger creative swings. It was the cusp of the prestige television era, and sci-fi was getting bigger, weirder, and more cinematic. In the decades since, many defining sci-fi series from the era have returned in some form.