Episode 3
Series Episode Number: 159World Premiere: Sat 22 Apr 1967 - 5:50pm BST [BBC One] (United Kingdom)
Running Time: 23 minutes 10 seconds
7.90 Million (UK)
Appreciation Index: 53 (UK)Chart Position: 43 () (UK)
Recorded on Tue 18 Apr 1967 in Lime Grove D
Archive State: 16mm t/r
With the support of Inspector Crossland, the Doctor pursues his investigations. But the Chameleons have already taken steps to prevent the Doctor from uncovering the truth.
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