Continuity mistake: In a few episode we'll hear about "Hodgkin's Law of Parallel Development," but here Spock claims the odds of a planet developing similar to Earth's Nazi culture are "virtually impossible." Why was it so likely as to be easily accepted there, but impossible here?
Continuity mistake: The blood dripping from Isak's mouth changes sides.
Answer: After causing Norman to overload, all of the other androids shut down. The same could be said for the androids on the Enterprise.