Late here, so this is a half formed thought, but are there many episodes of Trek that come close to being a Twilight Zone episode?
There are a few episodes that put crew members in an alternate reality (or what they think is an alternate reality) like The Inner Light, but they just don't seem Zoney enough.
Time Squared though, seems more like it. There was something more personal about the better TZ episodes, where our protagonist learns something about their deepest thoughts or fears. Seeing Picard look upon himself in the episode and doubt himself lends itself well to that. I can imagine Rod Serling introducing the episode.
There are a few episodes that put crew members in an alternate reality (or what they think is an alternate reality) like The Inner Light, but they just don't seem Zoney enough.
Time Squared though, seems more like it. There was something more personal about the better TZ episodes, where our protagonist learns something about their deepest thoughts or fears. Seeing Picard look upon himself in the episode and doubt himself lends itself well to that. I can imagine Rod Serling introducing the episode.