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?
It is never explained why John Gill had to introduce actual Nazi symbols (the swastika, specific uniforms, the word Fuehrer) in order to have the society emulate certain Nazi principles.
Also, although it makes sense that someone like Gill could introduce certain technological advances that would take root and blossom very quickly, it makes no sense that the planet looks exactly like 1930s or 1940s Germany. Why would Gill waste his time introducing old specs for thinks such as Tommy guns and automobiles? See more
There's been enough killing. Now we'll start to live the way the Führer meant us to live.