Part TwoSeries Episode Number: 531
World Premiere: Sat 4 Oct 1980 - 6:17pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 24 Sep 2017 - 4:30pm EDT [Retro TV]
Running Time: 21 minutes 24 seconds
4.20 Million (UK)Appreciation Index: 64 (UK)
Chart Position: 139 () (UK)
Masquerading as the Doctor, Meglos penetrates the underground city of Tigella. The Doctor and Romana are trapped in an ever repeating circle of time and seem powerless to act.