Furies (legend)

The Furies were a myth or legend in nearly every civilized culture including planets such as Sontar, Draconia, and Earth.

Madame Kovarian told Melody Pond terrifying bedtime stories about them when she was a child. According to Kovarian's version of the legend, the Furies had powers to rectify any problem in the world by laying a grievance at their feet and punishing a guilty person to death. Kovarian believed the legend was a good foundation to teach Melody about why she needed to kill the Doctor. (AUDIO: The Furies)