A battle rages between the rebels, the loyal colonists and the Daleks.
Bragen leads the rebellion and takes control of the colony, killing Governor Hensell.
Lesterson is driven insane when he discovers that the Daleks are reproducing themselves.
Polly is a prisoner of the rebels who want to use the Daleks to take control of the colony.
Posing as an Examiner from Earth, the Doctor tries to warn Lesterson about the Daleks.
Ben and Polly suspect the new Doctor may be an impostor.