Ian plans to derail the Daleks’ plan by sabotaging their bomb and the Doctor works to turn the Robomen against them. Afterwards, a tearful Susan remains on Earth with her new love.
Barbara is put to work in the Dalek mine where it is revealed that the Daleks intend to use a bomb to extract the Earth’s magnetic core.
The Doctor, Barbara and Susan make their way out of London to the Daleks’ mining operation in Bedfordshire whilst Ian faces the Black Dalek’s pet Slyther.
The rebel attack on the Dalek flying saucer has been defeated. London is crawling with Daleks and Robomen, and the Doctor, Barbara and Susan must escape the city.
The Daleks have conquered Earth. Susan and Barbara have joined the human resistance who launch an attack on the Dalek flying saucer where the Doctor and Ian are prisoners.
The TARDIS lands in a ruined and empty London in the 22nd Century. Robomen patrol the shattered streets. The Doctor is eager to discover the cause of the city’s plight.