I'm gonna open myself up to tomato throwing, but I must be the only person who doesn't like "City on the Edge of Forever." No, I'm not saying it's the worst episode of TOS, which is what this thread started out asking, but I don't think it's anywhere near the masterpiece that it gets credit for being. There are many, many other episodes of TOS I would rather watch. I guess I'm just not a fan when TOS does melodrama. I can't stand "Conscience of the King," for example. So there. I said. it. Fire away.
Art is indeed a subjective thing and it's always fun to read why people dislike the "fan favourite" choices.
It's been on the edge of forever since I'd seen either, but...
"City" has a cool idea, but the moral dilemma of "Let the boinkbunny die or else Hitler comes to power and zillions more will die" hinges more on the mawkish luuurve build-up between Kirk and Edith than anything else. TOS wasn't renowned for romance things (Scotty/Romaine was the most in terms of lack of chemistry, but "City" has the same problem - to a lesser extent but it's still there.) Shatner is acting his socks off for Edith's demise, but I didn't buy into it either.
The reason Kirk gives for Spock's ears was and remains cringeworthy. So much of the story doesn't elevate clever plotting as much as it should.
She's clairvoyant as well, how convenient! Convenient to the point of hokeydoke! It's got good music, though.
The scripting of reeling McCoy back in
is good, but how many onlookers saw Jim hold Leonard back? Indeed, how many other onlookers might have stepped in to save her (?!!) and what's making her act like she's stoned all of a sudden, more of that precognitive and predestination paradox stuff?
But despite it all, is that the worst story? IMHO, nowhere close. But I would argue, wagering 237 Quatloos, that it's somewhat overrated.
I recall rather liking "Conscience" for its interesting use of murder/mystery trope along with traveling troupes for the troops. I recall one scene with Lenore:
Anyone who wasn't mesmerized and drooling, or even perhaps for many who were, the story still missed an opportunity to show this as being in the neck between saucer and engineering hulls as it would be about that wide. Instead, we see the blackness of outer space and Kirk saying how the one side overlooks the shuttlebay... the position of the perpendicular corridor behind them also limits where on the ship this particular deck could be placed, assuming that was the shuttle bay with all the lights turned off. Either which way, many TV shows have the same problem of where interiors don't begin to match up with the purported locations and geometric angles therein. But it's easier to roll with some of those gaffes more than others. On a starship, even more so. (Never mind TNG's 'Haven' that also puts in a dining room, with window that doesn't fully match anywhere but if it had it would have been in the rear corner of the neck somewhere, but I digress.)
There's also this:
Definitely theatrical/stageplay style, with Kodos having one moment that does feel melodramatic, and the actors are playing characters within characters, which is pretty cool. Nor is that the best plot twist, which is at the end of the story, but it is perhaps too theater-like - 60s television production combined with a setting that incorporates a stage play. The Spock's Brain and Children Shall Lead episodes just don't have any good plot twists, and SB knows how far it can send itself up without going too far. Children has an interesting idea, simply poorly executed.
But art is inevitably subjective.