Part TwoSeries Episode Number: 543
World Premiere: Sat 10 Jan 1981 - 5:09pm GMT [BBC One] (United Kingdom)
First Broadcast: Tue 31 Mar 2015 - 8:30pm EDT [Retro TV]
Running Time: 23 minutes 47 seconds
6.70 Million (UK)
Chart Position: 93 () (UK)
Recorded on Thu 18 Sep 1980 in Television Centre 3
When Rorvik learns that Romana is a time sensitive, he takes her prisoner, forcing her to find a way out of the void. The Doctor attempts to discover what lies beyond the mirror.