Peter Bathurst

Lesterson is driven insane when he discovers that the Daleks are reproducing themselves, and are preparing to seize control of the colony.

Bragen leads the rebellion and takes control of the colony, killing Governor Hensell, but the Daleks are also ready to make their final move.

Polly is taken prisoner by the rebels who intend to use the Daleks to take control of the colony; the Doctor discovers that all three Daleks have been reactivated.