One of the most frightening Doctor Who villains on this list, at least for younger viewers, are the Weeping Angels. These menacing looking statue-like humanoids can kill people with a single touch and can only move when they're not being looked at, including when people blink. It's a horrifying play on the concept of quantum physics and observations (think Schrodinger's box, only it kills you, not the cat). Mercifully, the angels would "kill" their victims by sending them back in time to live out their lives peacefully while being dead in the present day. The terrifying statues would then feed on the energy of their victims to keep themselves alive. Appearing for the first time back in 2007 and returning a few times since, these frightening statues gave some younger Doctor Who fans a fright that wont soon be forgotten. We suspect the same can be said for a few adults too.
