22nd century Dalek invasion

The Daleks invaded Earth circa 2157, first bombarding the planet with plague-bearing meteorites and then invading to subjugate the survivors, apparently basing themselves out of London, which though mostly a dead city, in material terms remained intact. Some of the survivors, the Daleks converted into Robomen.

The Doctor, his companions and resistance fighters, including David Campbell, Dortmund and Jenny fight off the Dalek invaders. The Doctor's grand-daughter, Susan Foreman decided to remain in this time period with David. (DW: The Dalek Invasion of Earth).