In my opinion nothing is more terrifying and dangerous as the Weeping
angels. I mean, come on! They move when you can't see them
for god's sake! That is the scariest thing ever on Dr.Who!
They were at their best in Blink, their first appearence. I couldn't sleep for days!
They really got in my head.
I'm going with two- the weeping angels and the silence. The weeping angels for obvious reasons (there is a church with a weeping angel on the roof RIGHT by my apartment and I have to walk by it most nights) and then the Silence because you can't do anything about them. You look away and simply forget. Though I thought the way they "defeated" them was simply genius. Because seriously, they freaked me the hell out.
To quote Wikipedia (faaaaail sorry) "Actor Matt Smith, who portrays the Eleventh Doctor, called these aliens 'the scariest monsters in the Show's history' and Karen Gillan, who portrays companion character Amy Pond, commented that the Silence could 'actually rival the Weeping Angels in terms of scariness.' "
MY GOD THOSE FSDJFKHJSING WEEPING ANGELS.
The first time i saw the "Blink" episode was with my little brother in a dark room and we literally screamed out loud.
When you're scared as a kid the first thing you want to do is close your eyes and hope it just... goes away. At least that was my instinct. ;__; Those things scared the crud out of me. I still look askance at statues on buildings.
I loved the empty child I do not thing any thing has ever frightend me soo much even hereing the words. "Are you my mummy." Is enought to send chills down my spine, I remember not going to sleep for nights on end in fear of it. 4laugh