Robert Robertson

In a small and conservative Scottish village, a woman's paralytic husband convinces her to have extramarital intercourse so she can tell him about it and give him a reason for living.

Astronauts rescued from a mission to mars are kidnapped when they arrive back on earth. They seem to have been irradiated, and can now kill people merely by touching them. But the Doctor discovers the astronauts have been replaced with Alien ambassadors who are being forced to behave in a hostile manner. With The Doctor traveling to the alien mother ship, and Liz kidnapped, The Brigadier is left wondering who to trust.