The 19 best sci-fi TV shows of all time, according to critics
With network shows like "The X-Files," "Lost," and Netflix's "Stranger Things" tackling the genre over the past few decades, sci-fi shows are reaching a broader audience than ever before. "Orphan Black" has found critical acclaim and premieres its final season June 10.
If you're new to sci-fi or a die-hard fan looking for more, here are the best sci-fi shows according to critics, based on scores from Metacritic, which aggregates reviews of TV shows:
Note: superhero shows based on comic books were left out, along with older shows that don't have Metacritic scores ("The Twlight Zone," the original "Star Trek," the original "Doctor Who").