Yep, the whole setup for the show is kinda iffy, we're supposed to believe that there's no way to establish someone's identity other than a eyewitness confirmation? And Kirk was what, 12 then? Riley would have been 7-8 years old, tops. What about DNA analysis, voice pattern, facial recognition, or even the good old fashioned fingerprint? We're told that kind of evidence is not enough because it's too inconclusive and fallible to be put forward in a court, but a 20 year old memory of an 8 year old kid would somehow be enough to put him away? Also, only 9 witnesses? What about the other 4000 colonists who survived?
Even though the setup's iffy, the actual episode is really rather good. The slow build up and reveal of what Kodos is about, Kirk trying to uncover him, Spock and McCoy trying to uncover what Kirk is up to, return of Riley which is also welcome. Also, both Karidians are great in their roles and don't fall into overacting which is a danger when actors play actors
The eugenics angle that gets mentioned, was that a buzzword fear at the time? Leftover from Nazi times, or something that the filthy commies were accused of being up to?
Because what Kodos actually did had nothing to do with eugenics, he killed half the population so the other half could live, it wasn't some crazy experiment to better the gene pool, it was in his mind a matter of survival due to food shortage, and he apparently saved kids and whacked parents so it seems his guiding principle was children (and women?) first.
Kirk again flirts with a teenager, but this one at least is in the last year of her teens, and not the
first, so it's not that creepy when she talks about his surging and throbbing power. It is creepy he's only doing it to trap her father, but I guess it balances out since she's only doing it to kill him...
As for Vulcan being conquered, I presume Spock's logical thought process upon hearing that went something like this:
"This guy's about to get so pissed, by tomorrow morning he'll forget anything I said, so I shan't even bother correcting his obvious error."