2086

In 2086, the Thousand Day War, between Earth and Mars, started. Hostilities began when the Martians dropped an asteroid on Paris, destroying it. (PROSE: Transit)

The Fourth Doctor, Harry Sullivan and Sarah Jane Smith travelled to Takhail, Russia. They solved a problem that had cropped up there. Sarah was captured by the Threshold and was not returned to the Fourth Doctor's side for some time. (DWM: Black Destiny, Ground Zero)