The Enterprise tracks the missing Federation's cultural observer, Professor John Gill, to the reportedly primitive and peaceful planet of Ekos. When Kirk and Spock beam down, they find the Ekosians have turned into a Nazi society, with Gill as its Fuhrer, and are at war with the peaceful people of neighboring planet Zeon. They steal uniforms to enter the headquarters; but when Spock is forced to remove his helmet, his ears betray them and they are led straight to the torture chamber. After a flogging as 'Zeon spies,' they manage to escape with the Zeon prisoner Isak, who takes them to the Zeon resistance. The resistance tests them, and plots with an Ekosian defector to get to Gill, posing as a Nazi propaganda film crew. Inside they discover things are not quite as they appear. Written by
Did You Know?
The "leader principle" Kirk mentions at the end of the episode was a foundation of the leadership in Nazi Germany. Known in German as "Führerprinzip", it essentially can be described as a state of law in which there are no laws above those of the Führer, and that the government must obey and enforce such laws. See more
Kirk and Spock's tools, including the Universal Translators, are confiscated upon their capture, yet they continue to talk with Ekosians and Zeons with no trouble. See more
[Kirk has requested that McCoy beam down in a Nazi uniform
Kirk to Enterprise. What's happening up there?
Doctor McCoy is having difficulty with that uniform, sir.
Well, send him down naked if you have to. Kirk out.