Weeping Angels are fictional creatures from the television series Doctor Who. They appear as stone statues resembling angels, but they can move incredibly fast when not being observed. Their primary method of attack is to send their victims back in time, feeding off the potential energy of the lives their victims could have lived in the present. When a person looks at a Weeping Angel, it becomes frozen in place, resembling a statue. This unique ability makes them one of the most dangerous foes in the Doctor Who universe, as they can only move when they are not being watched.