Part Three
Series Episode Number: 460World Premiere: Sat 15 Oct 1977 - 6:13pm BST [BBC One] (United Kingdom)
First Broadcast: Thu 12 Jun 1980 - 5:30pm CDT [WTTW 11 Chicago]
Running Time: 23 minutes 28 seconds
7.50 Million (UK)
Chart Position: 65 () (UK)
Recorded on Mon 25 Apr 1977 in TC6
The Doctor and Leela have been cloned and miniaturised and injected into the Doctor's body. There they must fight the virus on a microscopic level before time runs out.
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