Weeping Angels

The Weeping Angels are a predatory race that resembles stone statues.

History
The Angels are believed to be one of the most ancient races in the universe, possibly existing as long as the universe itself.

The Doctor and Jess encountered a Weeping Angel onboard the Nihil's TARDIS. Another tried to ambush the Shalka Doctor and Caldril in the Death Zone.

Physical Appearance
The Angels resemble stone statues, bearing the winged image of the traditional depiction of angels. When they are being observed, they will stay still, maybe covering their faces so as to avoid looking at each other. When on the attack, their faces may take on a demonic look.

Powers and Abilities
One touch from an Angel will send its victim back in time. The Angel will then consume the energy from the days they might have said. The Angels can move extremely quickly but are inhibited by their inherent quantum lock: when they are being observed they are forced to stand still. They are unable to look at each other, as if that happened they wouldn't be able to move at all.

Season 1 (2015-2016)

 * 1) Devour
 * 2) The Dawn of Time