Chumeria

Chumeria is the rocky, barren planet of the Chimerons. Sometime in the future, it was attacked by the Bannermen and all Chimerions except their Queen, Delta, escaped.

After defeating the Bannermen on 1959 Earth with the help of the Doctor, she and Billy, a Human-Chimeron, traveled with her daughter to the brood planet to breed a new race of Chimerons. Afterwards they returned to their own time and rebuilt their race on Chumeria. (DW: Delta and the Bannermen)