The third Martian expedition arrives to discover that the Martians have been wiped out by a plague of chicken pox spread by one of the previous expeditions. The expedition's archaeologist, Spender, becomes obsessed with the extinct Martians and their lost civilization, and turns against his comrades to stop them from despoiling the planet.
Did You Know?
The episode title is part of the poem "So, we'll go no more a roving" by Lord Byron
, and is partly quoted in the course of the teleplay. See more
[All goofs for this title are spoilers.