It's hard to imagine many of the shows on this list existing if not for the brilliance of The Twilight Zone. More than 60 years after its premiere, Rod Serling's classic anthology series remains one of the best and most essential horror shows ever made. (And if you're looking for a place to jump in, try "Time Enough at Last," "The Monsters Are Due on Maple Street," "Nightmare at 20,000 Feet," or "Eye of the Beholder.")
Watch The Twilight Zone on Hulu.