Doctor Who: The Android Invasion
At UNIT headquarters, The Doctor and Sarah discover that everyone has been replaced...
Episode 1
On Earth, all is not as it seems as the Doctor and Sarah discover the dead are walking.
Episode 2
Sarah is a prisoner of the Kraals and the Doctor discovers the truth behind the village.
Episode 3
The Doctor discovers Styggron's plan to wipe out all human life on Earth.
Episode 4
The Doctor and Sarah try to warn UNIT of the Kraal invasion, but nobody believes them.
