I just watched the Deep Space Nine two-parter "Past Tense" again recently. Though it's not DS9 at its very best, and it's preachy even for Star Trek, it's always affecting—and it seems like every time I watch it, it becomes more plausible.
I'm not referring, of course, to the "chroniton envelope isolating the Defiant from the changes to the timeline" business, or even the idea of "changes to the timeline" making sense. If time travel is possible, nobody but the time travelers would ever perceive "changes to the timeline," because the act of traveling into the past would spawn divergent timelines that cannot be re-merged, but instead only be made to seem identical…but that's a discussion for another time. (Maybe when I finally get around to watching Primer, that can be part of my review.)
No, the plausible part is all the 2024 Sanctuary District stuff. The last time I watched "Past Tense" was probably four or five years ago, and what felt plausible then is no less so now:
- "It's not that they don't give a damn, Doctor. It's that they've given up. The social problems facing them seem too enormous to deal with." - Sisko
"We had to cancel our trip to the Alps this year because of the student protests in France." - the female party guest
"Jobs. You guys want jobs? When are you going to figure it out? There are no jobs! Not for us, anyway." - B.C.