Blink. The First Episode I Ever Saw Of #DrWho

The Weeping Angels (also known as the Lonely Assassins) are an ancient race of aliens from the Doctor Who television series. Their usual mode of feeding is to send their victims back in time, which creates time energy to feed on. When they are not being observed by another being, they can move very quickly and silently, but when they are being observed they become "quantum-locked", occupying a single position in space, becoming stone. In this state, they are frozen and difficult to destroy. They cannot suppress this reaction. If two Weeping Angels were to look at each other at the same time (or one were to look at a mirror), they would be trapped in stone form until an outside force moves them apart. To prevent this, they often cover their eyes while moving - this makes them look like they are weeping.

The episode "Blink" was the first episode I ever saw of Doctor Who. It was a random channel surfing accident and I've made appointments with the Doctor ever since.