Terra III is the original home planet of humans (aka Earthlings) once known as Earth. The inhabitants of Xenon and several other humanoid species in the galaxy originated from there. Located in the Sol system of the Milky Way, the human Roger Wilco had travelled back in time and visited it after his rescue of the Two Guys of Andromeda from the Pirates of Pestulon. Terra III is the name for the Earth of the future.