Part FourSeries Episode Number: 525
World Premiere: Sat 12 Jan 1980 - 6:06pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 2 Nov 2001 - 10:30pm CST [Prairie Public Television]
Running Time: 26 minutes 45 seconds
10.40 Million (UK)Appreciation Index: 67 (UK)
Chart Position: 26 () (UK)
On the dying world of Crinoth, Romana discovers the truth behind the Nimon's empty promises. The Doctor must find a way to shut down the power complex on Skonnos.