Carthedia was aplanet which acted as agovernment state for theSunlight Worlds. It was recorded as a member of theEarth Alliance but was more closely affiliated with theDalek Foundation.

Terrin andAlyst Blakely, along with their children,Sabel,Ollus andJenibeth, all came from Carthedia, as didHellic Dansard.

On a mission fromGethria to Carthedia, the charter shipKS55NZ/4 was attacked byDaleks, and Terrin and Alyst committedsuicide to avoid revealing vital information to their attackers. TheEleventh Doctor answered theirdistress call, and discovered their three children,Sabel,Ollus, andJenibeth. He then piloted the ship to Carthedia himself. (PROSE:The Dalek Generation)