A mute woman (Gem) is capable of absorbing the pain and injuries of others.
The Vians (fathead aliens) manipulate Kirk, Spock, and McCoy, administering
pain, to see if they can teach Gem compassion. In order to do this, the
Vians have to put McCoy in so much pain that he'll die or Spock in so much
pain that he will [go insane|become a vegetable].
FACTS
McCoy mutinies.
At the end, Scotty tells the "Tale of the Merchant" (the parable of the
pearl of great price from the Christian gospels.
OPINIONS
The plot dragged out to long.
Pretty cheap set.
Great dialogue from Gem.