Episode 4Series Episode Number: 207
World Premiere: Sat 18 May 1968 - 6:00pm BST [BBC One] (United Kingdom)
Running Time: 24 minutes 14 seconds
8.60 Million (UK)Appreciation Index: 56 (UK)
Chart Position: 28 () (UK)
Recorded on Sat 26 Apr 1698 in Television Centre 3
Archive State: Missing
The station is in danger of being destroyed by the approaching meteor storm. The Cybermen are smuggled aboard the Wheel and begin to take control of the crew.