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 Schulberg Building (formerly, the Directors Building) and the Lubitsch Building (formerly, the Producers Building), both located on the Paramount Studios lot, were used for the exterior shots of the Ekosian Nazi headquarters complex. See more
The lash marks on both Kirk's and Spock's bodies disappear and reappear between scenes. See more
Even historians... fail to learn from history. They repeat the same mistakes.