"Where No Man Has Gone Before"
While I didn't think it quite as good as "The Cage", this was still a strong story. It had purpose and a depth of meaning that elevates it considerably beyond the shallow piece it could have been going by the story outline. It's obvious that there was a thematic intent behind this. It's a thoughtful speculative piece first and a mad superman threat story a distinct second.
It would be interesting to speculate precisely what was happening in Mitchell's mind and in the minds of those who change. Was their human brain structure leading them to retain their original social and emotional connections to their fellows, while the ability or capacity of those fellows to provide stimulation or input on anywhere near the level they need is now non-existent? That might mean that rather than simply ignoring or discarding his former comrades as unimportant, Mitchell retains a focus on them and is sensitive to their means of relating to him; therefore he takes their limitations, it would seem, as an affront. He's now unable to see them as anything other than useless irritations and
targets
of resentment, even before they try to kill him. (After they start trying to kill him, he seems to take it personally in spite of agreeing with Spock's assessment that it's a dispassionate logical decision). Seeing someone as an insect doesn't mean you want to squash the insect, after all - it means you won't shed any tears if you do, and won't hesitate should it serve your interests (you also won't take it personally when it bites you) - but there shouldn't be any reason why you'd particularly want to. But seeing someone to whom you're irrevocably bound to (wired to socially) as an insect; that must be quite intolerable. Who are you, insect, to buzz around in my conceptual space, in my sense of self and its relation to the wider universe that has just blossomed into something a thousand times more complex and sophisticated? All this knowledge has opened up to him, and yet his vision and power is contained, as Kirk stresses, within a human vessel, and that human brain is wired in certain ways with certain priorities. And it's very clear that this energy/power is to all intents and purposes "possessing" Mitchell and Dehner; when it recedes, their original selves remerge. The beings they become are both an explosive expansion of their personality refracted through a medium of great power and knowledge, and a lodging of that power within them - it's as though they are inside it and it is inside them simultaneously.
The mystery as to what's occurring psychologically is of course more important to the story than any explanation for the barrier (the physics of which is Space Magic, of course); especially so given that Dehner is a psychiatrist. I like that the precise balance of the multiple explanations for her retaining more of her original ethics than Mitchell is uncertain. We can easily comprehend the factors that play into it, but not the balance. It's likely in part because she received a lesser dose and a delayed blossoming, and clearly partly because her character is more resistant, and her personality traits allow her to keep herself at a remove; among those traits are what we can assume to be strong and detached self-analytical tendencies (Kirk and co note several times that she's a highly trained psychiatrist, so science and psychology are her specialties). I also like how her earlier passionate defence of Mitchell's change - and the possibility of it being a good thing rather than something to be feared - takes on additional meaning in hindsight, when it's made obvious that she must have already known she was starting to undergo the shift herself. There's a fair amount to unpack with this character, and I found her a worthy inclusion (Mitchell too).
In keeping with my idea that Mitchell's problem isn't the vast scope and vision that renders his crewmates inconsequential but the tussle between that vision and a brain that remains latched onto more intimate concerns, it's likely that part of the reason Dehner doesn't lose herself as fully as Mitchell did is that she retains her detachment - both from her own mind (so enabling her to engage still in self-analysis where Mitchell can't or won't) and from others, enough of a detachment to lack any particular desire to squash the bugs.
(Another part of it is because
she hasn't known Kirk for 15 years, of course, so naturally she'd be more detached anyway. Still, in general it's clear that she has some of her faculties still engaging in self-reflection and ethical feedback whereas Mitchell has lost himself, or been lost, in the invasive power).
Continuity
Of course, we know what happened to the
Valiant, because we saw its final mission unfold back near the beginning of this chronology.
I might have assumed that the blond lab technician Mitchell got Kirk involved with was Carol Marcus, but
Inception made it clear that it wasn't, referring to the incident and naming the
woman
in question as someone else.
Spock is still shouting every now and then.

His character wasn't fully formed yet, of course, though the devotion to logic and efforts to quash emotion in both expression and reasoning are there (plus the obvious fact that he does indeed possess the emotions). Apparently his telepathy wasn't conceived yet, though, which leads to a rather blatant oddity: why isn't Spock either dead or, more likely, conjuring Kaferian
apples
while informing Kirk that he's looking for worlds to use? I guess we have to assume Vulcan minds can block the effects entirely or for some reason they're not affected, though it still seems strange now that Spock makes no mention of his own immunity.
The Canopus Planet is mentioned for the first time. Its history, interpreted through all that's come since, is a little difficult to understand. Tarbolde sounds human to me (his first name is apparently Phineas, which basically confirms it), yet there's no way Humans are on Canopus in 1996 writing about nightingales and/or their love for their airplanes. We can disregard the (non-canonical?) Phineas and assume that Tarbolde is non-Human, but that leaves it uncertain who originally
colonized
Canopus. We know Humans live there in some numbers by the 24th Century, but it hasn't ever been confirmed as majority-Human, so far as I know.
We've already seen Kaferia (Tau Ceti III). Dimorus I don't think appears at any point in this chronology at present, although I know the system has shown up in
Star Trek Online. (I think it's Romulan? S'Harien Station is there).
Next Time:
Harbinger. Speaking of space stations, have they finished that starbase yet?