The Grell are a subjugated people who are made to serve their more "enlightened" masters. They have the best of humanity, kindness and compassion, and yet are treated as if they were filthy insects. They raise the children, give of their own being to save others, and receive nothing in return. In this episode, a family of earth people are trapped and must find a way to their place of rescue. Unfortunately (or not), they are hunted by the Grell who have formed a resistance. The poor servant must choose between his loyalty to his family and joining the rebels. He gets an agreement from the family as he uses his devices to save the father in exchange for his freedom. Of course, the earth people will promise anything and then not deliver on their promises. How can you make a pact with something so inhuman? The bodily fluids used to save the man have some interesting side effects and that's when the themes of the story come out to play. Deanna Troi from Star Trek: The Next Generation stars as a bigoted mother who has no scruples whatsoever. This is a very interesting episode.
