Episode FiveSeries Episode Number: 178
World Premiere: Sat 28 Oct 1967 - 5:24pm BST [BBC One] (United Kingdom)
Running Time: 23 minutes 51 seconds
7.20 Million (UK)Appreciation Index: 51 (UK)
Chart Position: 61 () (UK)
Recorded on Sat 07 Oct 1967 in Lime Grove D
Archive State: Missing
Discovering that his old friend, Padmasambhava, is still alive after three hundred years, the Doctor goes to confront him. The Great Intelligence prepares to make its final move.