Episode FourSeries Episode Number: 231
World Premiere: Sat 18 Jan 1969 - 5:16pm BST [BBC One] (United Kingdom)
First Broadcast: Fri 26 Sep 2014 - 8:30pm EDT [Retro TV]
Running Time: 22 minutes 39 seconds
7.10 Million (UK)Appreciation Index: 55 (UK)
Chart Position: 68 () (UK)
Recorded on Fri 13 Dec 1968 in Lime Grove D
Archive State: 16mm t/r
The Krotons are preparing to leave the planet and demand that the Gonds hand over the Doctor and Zoe, so that their mental energy can be drained.
The episode ends with the TARDIS dematerialising.