Loved "Twilight Zone." And I have a book somewhere that breaks down every original episode with title, cast, synopsis and notes. That said, I don't know the titles of most of my favorites. Of course, being a foodie, there's "To Serve Mankind." Then there's the one with Burgess Meredith as the bookworm who ends up all alone in the work and it's filled with books, except he'll loose or break his glasses by the end of the episode and realize he's in a hell of his own.
But my favorite wasn't even filmed for "TZ." It was the short film of "Occurrence at Owl Creek Bridge," which aired in the last season when the show had gone to an hour. It was an almost-silent episode as the story unfolded and it was just beautifully filmed. The ending was a shocker to me.