Doctor Who and the Silurians (7)

Doctor Who and the Silurians (7)

Available on BBC iPlayer
S7 E11: Their plan to wipe out the human race with a virus having failed, the Silurians decide to make the planet uninhabitable by destroying the Van Allen Belt, the radiation belt that surrounds the Earth. They force the Doctor to help them.
Starring Peter Halliday, Nigel John