Star Trek Anniversary - John's Top 20: "The Devil in the Dark" (#6)
The real value in the episode, isn't just the nature of the enemy, but the nature of man. Kirk steps up and brokers piece, even after blood has been spilled among the miners of Janus VI. The episode is a statement to the effect that we don't have to be blood-thirsty. Even after blood has been spilled, understanding -- and peace -- are possible.