Terror of the Zygons (Story Order)
4 Episodes
Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Brigadier summons the Doctor to Earth to help in the investigation, but it soon becomes clear some kind of alien presence is at work...
Read MoreThe Zygon traps the Doctor and Sarah Jane in a decompression chamber while Harry is taken to the aliens' underwater ship.
Read MoreThe Doctor and the Brigadier begin to realise who the Zygon imposters among them are while Sarah Jane discovers a secret tunnel to the underwater ship.
Read MoreUNIT attempt to track down the Zygon ship while Broton prepares to have the Skarasen attack London.
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