Across nearly 1,000 television episodes spanning 60 years, the franchise has produced some of the most genuinely terrifying hours in science fiction television history. Here are the best of them. 7.

"This whole evil alien trope seems to me to be a mirror held back to how our civilization has interacted with itself." ...

Originally conceived in the 1980s as a high-concept sci-fi film of ideas crossed with a police procedural, 1995's Species ...

Netflix's 8-part sci-fi horror series intertwines survival in space with profound existential questions about humanity.

Neil deGrasse Tyson has turned his lifelong fascination with aliens into a new book, “Take Me to Your Leader: Perspectives on Your First Alien Encounter.” ...

From Markiplier to Curry Barker, it seems like the future of horror just might be in the hands of your favorite YouTubers.