A mysterious traveler can visit any point in space and time.
Posing as an Examiner from Earth, the Doctor warns the scientist, Lesterson about the dire consequences of reactivating the dormant Daleks.
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.
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.
The Doctor witnesses a murder and, while investigating, finds a pass badge for unrestricted access.
William Hartnell
The Doctor
Patrick Troughton
Jon Pertwee
Tom Baker
Peter Davison
