Last updated 24 March 2024


Episode 4

Series Episode Number: 189

World Premiere: Sat 13 Jan 1968 - 5:25pm GMT [BBC One] (United Kingdom)
Running Time: 23 minutes 46 seconds

7.80 Million (UK)

Appreciation Index: 49 (UK)

Chart Position: 66 () (UK)

Recorded on Sat 23 Dec 1967 in Lime Grove D
Archive State: Found (11-Oct-13)



Kent coerces the Doctor into agreeing to impersonate Salamander. Deep beneath his research centre, Salamander is hiding a dark secret.