- World rich in vegetable matter but extremely poor in minerals. It was ruled by the despotic Lady Adrasta. When the Tythonian ambassador, Erato, arrived on Chloris to offer to trade chlorophyll for metal, to preserve her power, Adrasta kept him prisoner in the mines (which became known as the Pit) for fifteen years. The Fourth Doctor and Romana eventually discovered Erato's true nature and exposed Adrasta's duplicity. The Doctor and Erato then saved Chloris from total destruction by a Neutron Star which had been diverted by the Tythonians as a form of reprisal (5G).