Episode SixSeries Episode Number: 237
World Premiere: Sat 1 Mar 1969 - 5:14pm BST [BBC One] (United Kingdom)
Running Time: 44 minutes 31 seconds
7.70 Million (UK)Appreciation Index: 59 (UK)
Chart Position: 59 () (UK)
Recorded on Fri 07 Feb 1969 in Lime Grove D
Archive State: 16mm t/r
Returning to the Moonbase, the Doctor confronts Slaar and the remaining Ice Warriors and must find a way of deflecting the invasion fleet that is heading towards them.