io9.com, a very fine sci-fi website. All things considered, this is a pretty decent list and I don't have much to complain about. Not that I would anyway, since I understand that lists like these aren't meant to be definitive, so much as fun and joyous about Star Trek. I would have written a different list than this, but none of these are bad episodes by any means.
I am intrigued by their choice of Balance of Terror as the best Star Trek episode of all time. That's a great episode to be sure, but I probably would've have even put it in my top ten. I am glad that they didn't go with the stock choice for these lists, City on the Edge of Forever, another very fine episode, but one that I think is a bit overrated. When people ask me which is my favorite Star Trek episode, I usually say either The Inner Light or Far Beyond the Stars. However, if I ever did sit down to compile a list (and I'm not saying I'm gonna), I admit I'd probably want to give the top spot to an episode of the original series. Anything else just wouldn't feel right. Having said that, it would be hard to choose my favorite, but it would probably be Mirror Mirror, The Corbomite Maneuver, or Devil in the Dark. Anyway, those are my favorites. I also really like Conscience of the King... and all of them, to be perfectly honest, at least from the first couple seasons anyway.
Another interesting to note -- and something of which I approve -- is the absence of Voyager or Enterprise in the top 20. I'm sure they were tempted to represent all of the series in the top ten, but I'm happy they resisted. Frankly, as much as I enjoy all Star Trek (even the shitty episodes), Voyager and Enterprise are definitely Star Trek light. The highest ranking Voyager episode was The Equinox at 23. If I've ever seen that episode (and I'll admit I've never made it through all of Voyager past season 5 or so), I don't remember it. I'm sure it's great.
The highest ranking episode of Enterprise is Twilight at #33. That was a decent episode, but it probably wouldn't make my top 100 list. There are better episodes of Enterprise, although off hand I can't think of a single one. Oh wait... That one where Trip falls in love with some a-sexual chick who commits suicide. That was a good one. Let's see if that made their top 100... Nope. Poor Enterprise. Even the Animated Series got more love on this list, since the topped out at #30 with Yesteryear, which probably would have made my top twenty. That's a good episode.
Anyway, check out the list and let me know what you think.