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Uploaded on Jan 15, 2012
Possessing a natural and unique defence mechanism, the Angels are quantum locked. This means that they can only move when no other living creature, including their own kind, is looking at them. As soon as they are observed, they instantly turn to stone and cannot be killed. The Angels have the ability to send other beings into the past. This allows the Angels to feed on the potential time energy of what would have been the rest of their victim's lives. In The Time of Angels the Doctor and Amy along with River Song went hunting for a solitary Angel but discovered an army of them waiting in the Maze of the Dead! Although the Lonely Assassins vastly outnumbered their prey the Doctor was able to outwit them using gravity and the army was defeated. But there's no telling where the Weeping Angels might strike next... the Doctor must remain on his guard against these beautiful but merciless killers.