Lesterson is driven insane when he discovers that the Daleks are reproducing themselves, and are preparing to seize control of the colony.
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 now been reactivated.
Bragen leads the rebellion and takes control of the colony, killing Governor Hensell. But the Daleks are also ready to make their final move.
Having left the Major's practice, Upton takes Collier and Stuart-Clark to his parents' home for a weekend away from the daily slog of medicine. However, they meet a lady on the train - and does she have problems!
