Part FourSeries Episode Number: 622
World Premiere: Fri 16 Mar 1984 - 6:41pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 22 May 2015 - 8:30pm EDT [Retro TV]
Running Time: 25 minutes 37 seconds
7.80 Million (UK)Appreciation Index: 68 (UK)
Chart Position: 62 () (UK)
Morgus is ruined and Jek goes on a murderous rampage. Back in the TARDIS, the 'dying' Doctor manages to cure Peri's spectrox toxaemia and then regenerates...