Let This Be The Last List
There have been a lot of tributes to Star Trek, this being its fiftieth anniversary and all. As part of the celebration, the Hollywood Reporter lists the top hundred episodes of all Star Trek shows.
The #1 episode of all time--for all the shows--is "City On The Edge Of Forever." No surprise. In fact, it would be a surprise if it weren't there--it'd be like a top movie list without Citizen Kane. The next two choices from the original series, at #3 and #5, are "Balance Of Terror" and "Space Seed." I don't know if they'd be my picks, but as expected. Then #8 is "Mirror, Mirror"--another likely title to show up on the list.
It turns out this is Shatner's favorite, but I don't know anyone else who agrees*. This heavy-handed allegory on race relations has usually been considered an embarrassment, even among the weak episodes of the third season.
The list soon follows with mainstays like "A Piece Of The Action" and "The Trouble With Tribbles," but it's hard to read any further. Putting "Battlefield" up so high--or on the list at all--sort of makes the whole project pointless.
*I just read this article in Variety where people connected to Star Trek pick their favorites, and to my surprise, two of them listed this episode, including Jonathan Frakes.