Part 1:
The Doctor and his companions stumble upon a technologically advanced city.

Part 2:
The Doctor meets the Daleks for the first time.

Part 3:
Held hostage, the group form a plan to escape.

Part 4:
The Thals come to the city to make peace with the Daleks.

Part 5:
The Daleks have become conditioned to radiation.

Part 6:
The Daleks inform the Doctor of their plan.

Part 7:
With the aid of the Doctor, the Thals rise up against the Daleks.

LinkCredit: BBC