Bread and Circuses
Summary
Captain Kirk and his companions are forced to fight in gladiatorial games on a planet with a civilization similar to the Roman Empire. Kirk, Spock and Bones beam down to a planet to find out why its people live like the ancient Roman Empire where slaves are subjected to fighting in gladiatorial combat. They ask refugees who escaped slavery to help them get into the empire where they meet a former starship captain. All three of them are captured. Spock and Bones are forced to fight and later all three of them are sentenced to the death penalty. However, Kirk, Spock and Bones manage to get back their transponders, and Scotty immediately beams them up.
Summary from Wikipedia, CC BY-SA 4.0.
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