Doctor Who: After the Daleks (7.1)

The Dalek Invasion of Earth is over, but there's still so much left to do. Susan is trying to help rebuild society as best she can, but some people don't see it as a chance to restore what was lost. Some people see it as a chance to claim power for themselves.

It's not just human survivors that Susan has to worry about. Unbeknownst to her, a lone Dalek survives. A lone Dalek with a single purpose - to reclaim the Earth!