A writer is having an affair with a married woman and gets embroiled with the other women in her life.

Police hunt for mental hospital out patient Simon Lacey, who has been unwittingly handing out barbiturates to children as sweets.

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.

Francis Bigger, a notorious charlatan who tours the country lecturing on the subject of mind over matter, slips off the platform in the middle of his performance and ends up in hospital under the care of Dr Tinkle. The hospital is about to enter a period of total chaos.