Doctor Who: Scream of the Shalka

The Doctor arrives in the village of Linnet, Lancashire to find it eerily silent. He soon discovers that the locals, with the exception of the barmaid Alison Cheney, are terrified of strange creatures that live underground.

After capturing Alison, the Shalka force the Doctor to give them access to the TARDIS.

Alison has been implanted with a Shalka, which allows her to take control of the evacuees. The Doctor discovers that the aliens have mobilised other communities around the world in order to destroy Earths atmosphere and wipe out humanity.