Part ThreeSeries Episode Number: 536
World Premiere: Sat 8 Nov 1980 - 5:42pm GMT [BBC One] (United Kingdom)
First Broadcast: Thu 26 Mar 2015 - 8:00pm EDT [Retro TV]
Running Time: 22 minutes
5.90 Million (UK)
Chart Position: 115 () (UK)
Recorded on Thu 21 Aug 1980 in Television Centre 6
Romana has been infected by the bite of a marsh spider and the Doctor discovers that the ruling Deciders have been perpetuating a lie to their own people.