Fleeing an Earth corrupted by passions,
cruelty, and hatred, the people of Kelos III sought to create
the perfect society. But how could man overcome his very basic
nature unless it was bred out of him?
A century after their society was
established, the people of Kelos thought they had finally succeeded.
A colony of genetically perfect humans anyone born or who would
be born imperfect was subject to vaporization.
When the Doctor and Christine arrive,
they find a society where only perfect life is valuable and the
imperfect are hunted down as so much animal fodder, an infection
that needs to be stamped out before it corrupts their world.
Can the Doctor save a society whose
zeal for perfection will ultimately lead to their own extinction?
Or will time run out as Christine is branded an imperfect and
led away for vaporization before the Doctor's very eyes?