The Dashrans, also known as Dream-Spinners, were the original inhabitants of Dashrah, a planet in the ninth galaxy. They warped reality according to their whims through detailed computation and mathematical processes. One of the machines which enabled them to do so was acquired by the Trans-Gal Media Group for use in Reel-Life, an innovative way of watching television shows. (AUDIO: The Fourth Wall)
Before their homeworld was placed under the protection of Galactic Heritage, the Dashrans disappeared under mysterious circumstances. (AUDIO: The King of Sontar) This had the effect of making them legendary, the Doctor attempting to find out why they died off. (AUDIO: The Fourth Wall)