Part Two
Series Episode Number: 501World Premiere: Sat 27 Jan 1979 - 6:27pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 4 May 2001 - 10:30pm CDT [Prairie Public Television]
Running Time: 23 minutes 56 seconds
8.80 Million (UK)
Chart Position: 49 () (UK)
Recorded on Mon 06 Nov 1978 in Television Centre 3
The Marshal demands that the Doctor devise the ultimate deterrent against the attacking Zeons. But who are the Zeons? The Doctor and Romana begin to suspect that the Marshal is being manipulated.