TV Shows That Are Guaranteed to Freak You Out

For some reason, I love to watch insanely scary and weird shit in the summer — and I'm pretty sure I'm not the only one. But just one movie isn't enough. I want a TV series that will routinely make the hair walk off my head. What do you recommend?

Post pictures, video, and links! I want the scary and the creepy and the please-don't-watch-before-bed-ness!