Watching Mirror, Mirror and The Enemy within so close together is that they really show you the dark side of humanity.
The very dark side.
There's the side of Kirk you don't want to see. And Spock, and Sulu, and Chekov. We don't really see Uhura or Scotty or McCoy being evil.
Scary, isn't it?
But what's scarier is the people on Heroes. Sometimes they're good and sometimes they're shooting Simone and breaking into people's houses. And sometimes George Takei is handing over other peoples children to that guy who plays Claire's dad and OMFG, what is going on here? Because now everyone's all interconnected.