Part Three
Series Episode Number: 416World Premiere: Sat 6 Dec 1975 - 5:46pm GMT [BBC One] (United Kingdom)
First Broadcast: Tue 15 Apr 1980 - 5:30pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 50 seconds
12.10 Million (UK)
Chart Position: 14 () (UK)
Recorded on Mon 25 Aug 1975 in TC8
The Kraals intend to invade Earth by stowing away aboard Crayford's rocket as it returns home. The Doctor learns Styggron's plan is to wipe out all life on the planet.
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