Greg Cox wrote:
And don't forget the way transporter beams can split people into their good and evil selves, or else transport them to the Mirror Universe. Both also very cool, of course.
It's doesn't exactly split them into "good and evil", but rather into their "wussy side" and their "animalistic side". Remember, even the "wuss" Kirk could not function properly (being such a mamby-pamby). If it was simply a matter of being good and evil, then I think they could have done away with evil Kirk and just moved on...
...But yeah; very cool.
That's a better, more precise description, to be sure. I was oversimplifying things for the sake of brevity. But indeed, Richard Matheson's screenplay makes its very clear that Kirk needs both halves to be a complete human being . . . .
But if the transporter can do all that, we're really going to balk at underwater spaceships?