Hmn, yes, he does that a lot. Then again, that sort of shit happens quite a lot to other people as well.
And, yes, of course, you're talking about the second pilot, the first actual Star Trek episode aired. 'Where No Man Has Gone Before', it is called I believe. The one where they go to the edge of the galaxy yeah? As far as I'm aware I think they over-packed it a bit with effects and action to try and address the criticisms that had been levelled at The Cage. As far as I remember, Kirk, Spock and possibly Scotty are pretty much the only regular characters in it (or at least, the only ones we tend to think of as regular characters, ie, people who made it to the movies).
To be honest, if I wasn't pretty sure Gene Roddenberry was a quite tight-laced fellow (I've always imagine him as a sort of sci-fi writer equivalent of Mr. Rogers) I would imagine that quite a lot of the original Star Trek might have been written with the aid of psychedelic drugs. Of course, Roddenberry didn't write most of the episodes, and I have no idea about the artists, guest directors etc. so who knows. Though to be fair to it, you've got to remember that the original Star Trek was written in an entirely different sci-fi tradition to what we have today, a tradition which, in fact, Star Trek probably helped shift quite a bit. There was always more of a legacy in Star Trek to things like Flash Gordon and Amazing Tales magazine than 'serious' sci-fi. One of the reasons that TNG is so much less dated, to our eyes, is that it was operating in much more the same culture: In the 20 years since ToS we'd been exposed to things like Alien, Blade Runner and The Neuromancer. We knew where computers were going, and we knew that we almost certainly would not be wearing miniskirts and silver jumpsuits in the future.
Mores the pity.