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
Spock refers to Nazi Germany as a "tiny country" which rose to dominate Europe. In fact, Germany was already the largest country in Western Europe by the time the Nazis took over. See more
[after coming across Kirk and Spock for the second time, Eneg leaves them again quickly without exposing them to the guards
Well, Captain, I... do not understand how he failed to recognize us.
Nor do I. But... luck is something you also fail to recognize, Mister Spock.