Phaidon

Phaidon was the home planet of the time-travelling species known as the Warpsmiths or Warpwrights. (PROSE: Parallel Lives) It orbited binary stars. (AUDIO: Enemy Lines)

At the start of the time war the Daleks invaded Phaidon, reducing its population of 9 billion down to 5000, who escaped in a timeship to Gallifrey. (AUDIO: Celestial Intervention)