Interview with a Vampire,
Twilight zone was really good
Love Dark Shadows (old version) not exactly scary but…Love the 1st season in American Horror Story, and Walking Dead 
Walking dead! Can’t handle it for very long tho!
American Horror and Twilight Zone
There are just so many! Supernatural is one of my favorites along with Stranger Things.
Tales from the crypt
Hands down it has to be “The Twilight Zone”@
Chucky seed of chucky bride of chucky
I loved watching Twilight Zone when I was a kid.
Grimm was creepy, we still attribute actor’s attributes when we see them in other shows… Ooh, she’s a Hexen Beast… Seconarily was Monster’s Inc. with my 3 year old granddaughter…
Dark Shadows—it’s older. I just remember being scared too death when I was younger
Tales from the Darkside!
Walking dead!! 
♂ I’m addicted to the series .
The Haunting of Hill House! Crazy scary
Supernatural The Walking dead
My favorite is Halloween with Micheal myers.i love every one of them.
Amityville Horror 
Nightmare on Elm Street
Lots of people not understanding the question and listing movies instead of TV series is pretty scary but my favorite was Twilight Zone because it was always different each week.