First, I did another comic strips thing on my mathematics blog. Yes, there’s Jumble in it, don’t worry.
Now, something I realized recently about the mirror-universe episode of the original Star Trek. You know, it’s the one everybody does evil-twin universe episodes about. It’s a subtle thing. The episode starts with Kirk meeting the leaders of the Planet of the Week, right before it Ion Rains. Later, Kirk in the Mirror-Universe hails the Weekian leader. And it’s a small thing but the Weekian leader’s disheveled, and he’s got black eyes. He’s been roughed up. Presumably, by Mirror-Universe Kirk.

It’s one of those little things you can watch the episode a dozen times before noticing. It’s a great little touch showing how brutal the Mirror Universe is.
And then what I finally realized: wait, so the Empire is diddling around sending starships all over the Mirror Galaxy to non-compliant planets so Mirror Kirk can beam down and punch people until they behave? That seems like a poor use of resources. But then I also realized: that’s pretty much what the Federation and the good-universe Star Trek is about too. It’s mostly Kirk punching the Weekian leaders until they stop screwing up their planets. The Good Universe Kirk is mostly fighting for the dignity of individuals, but that does come down to a lot of fist fights.
They did other kinds of episodes, so it’s not like I’m saying the show should be renamed Space Punching. But I have got to re-watch the show with this insight in mind.