This Week in USA
The Invisible Enemy: Part One
Last updated 13 January 2018
7:30pm-8:00pm EST (00:30 GMT) < > « »
Retro TV
Featuring: Tom Baker, Louise Jameson, John Leeson, Michael Sheard
An alien virus infects the human crew of a refuelling station on Titan, one of the moons of Saturn. The Doctor is also infected and becomes possessed by the will of the Nucleus.
Synopsis Source: Doctor Who Guide
Broadcast Source: Retro TV