Even if their respective series are good, they villains might be a bit unremarkable or unoriginal.

Though they resemble nothing more than a standard grey alien, their concept is entirely frightening.

Their signature clicking noises are almost guaranteed to send a chill down anyone’s spine.

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Image by Federico Napoli

Even in the video game, Clickers were among the most dreaded enemy types one could encounter.

Perhaps the worst part about them is that something feels so inexplicably “wrong.”

It’s like watching a kitten hatch from an egg.

Cameron Monaghan as Jeremiah Valeska, holding a robe and smiling in Gotham

Image via Fox

Even ifThe Wheel of Timeisfar from a horror show, these villains are still remarkably creepy.

He has turned his starving hounds loose on countless innocent people, some of them his previous wives.

NEXT:The Best Horror Shows of All Time, Ranked

Gotham Season 5 Poster

Chucky looking really old standing in a room looking into the camera in Season 3

Image via USA

Chucky Tv Poster

A colonist stares deeply into the eyes of a man

Image via 20th Century Fox

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Mads Mikkelsen as Hannibal Lecter looks up at something off camera.

Image via NBC

Hannibal TV Series Poster

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Image via HBO

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Custom Image By Yailin Chacon

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Custom Image By Yailin Chacon

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Custom Image By Yailin Chacon

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A myrddraal exposes its toothy maw

Image via Amazon Prime

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Ramsay Bolton staring off into the distance in Game of Thrones

Image via HBO

Game of Thrones Poster

Demogorgon

Image via Netflix

Stranger Things Season 4 Poster

An angry-looking Pennywise (Tim Curry) stares from between hanging sheets in 1990’s It

Image via ABC

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A Weeping Angel in ‘Doctor Who’

Image via BBC

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Doctor Who (1963)