the children from this episode of Star Trek
http://www.tvsquad.com/2007/10/24/all-time-scariest-tv-characters-10-gorgan/Really, to get technical, both Gorgan and his followers freaked me out. To paraphrase Hank Hill: "Those kids ain't right." Well, why should they be "right" when they were being controlled by their "friendly angel" Gorgan so he could find a planet to control? Plus, the fashion sense of those kids was just out of control. Lord, the late '60s was just a nightmare for clothing!
What really scared me was what happened at the end of the episode. As Kirk is showing the kids' a tricorder video of their dead parents, Gorgan begins to deform. I remember thinking back when I originally saw the episode on WPIX that the effect reminded me of what happens when film gets caught in a projector and begins to burn. Before he disappeared he was so deformed that I couldn't help but to stare in fascination at his horrible face.