Destruction of homeworld Edit
Captain Harris and his race were a peaceful tribe who lived on an ocean world until the Daleks activated their Reality Bomb. Somehow many of the Spaerons managed to escape the destruction of their planet, with Captain Harris as their leader.
Relocating to Earth Edit
Captain Harris built a new civillisation in an ocean on Earth, building a house of parliaments and transport for his people. When the Tenth Doctor and Heather came across Harris's civilisation, the Doctor, feeling responsible for the destruction of their homeworld, helped Harris find a new home for his species. He also uncovered a corrupt Spaeron called Askelia who planned to flood the Earth.