Episode 6
Series Episode Number: 263World Premiere: Sat 7 Mar 1970 - 5:15pm BST [BBC One] (United Kingdom)
First Broadcast: Wed 1 Oct 2014 - 8:30pm EDT [Retro TV]
Running Time: 24 minutes 15 seconds
7.20 Million (UK)
Appreciation Index: 57 (UK)Chart Position: 63 () (UK)
Recorded on Mon 19 Jan 1970 in Television Centre 8
Archive State: PAL Restor
As the Silurian plague quickly spreads, the Doctor desperately searches for a cure. But the Silurians are aware of the Doctor's efforts and intend to stop him.
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