The Architects of Pain
"The Empath"
Lal and Thann, two advanced alien experimenters, capture Kirk, SPock and subject them to various tortures. Their goal? To cause an emotional response in Gem, a lovely mute girl who can absorb pain from others. If she is willing to sacrifice herself to save McCoy, the experiment will be proved successful. Kirk reminds the aliens that while their motives are good, they themeselves have lost their emotions!
