Buffy The Vampire Slayer

1. Show: Buffy the Vampire Slayer - Episode: “Hush” - Monster: The Gentleman

Buffy has a long list of effective monsters, but none were as genuinely scary as the Gentlemen. The silent characters did not utter any of the quips we’d come to expect from our Whedon villains. Instead, they floated about with their menacing grins and occasionally cut out a heart from an incapacitated — but awake — student (apparently, they didn’t need any livers, as I’d imagine a university would be a poor place to find a healthy one). Not only do they do this in absolute silence, but they also steal the voices from Sunnydale’s entire population. Like all good horror, it tapped into a primal fear, that of the inability to cry out for help, to be heard in any way. It was bad enough that the things had a nasty habit of collecting still-beating hearts, but it was made so much worse when these gentlemen lacked the courtesy to let their victims scream while they did it.

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http://popvultures.com/2008/02/01/5-creepiest-scariest-tv-monsters/