 Before their destruction, the simulants' leader has "Starbug" infected with an "Armageddon Virus", locking the ship on a suicide course with a large volcanic moon.Kryten infects himself with the virus in order to begin creating a "dove" program to counter it, advising the others to watch his dreams.The group find Kryten combating the virus within a Wild West dream, in which the mechanoid is a burnt-out sheriff in a town called Existence, while the virus operating as outlaw gang called the Apocalypse Boys, consisting of Famine, Pestilence, War, and Death.