DazharionI mean...
AeronMelonThe plot is Smiley breaks into the prime universe and conscripts O’Brian to come back with him and fix the beaten-to-shit ISS Defiant for one last battle to save the newly-democratic Terra.
I hate the mirror universe with a passion. It is by far my least favorite plot device in all of Trek.
Plot device? It has less than nothing to do with actual plot elements within any of the shows. Usually it’s just a fun “what if” kind of thing ranging from moral philosophy to just having a fun romp.
Ah, I never watched it, at least partly because of that. It took something whimsical and made it melodramatic (from descriptions I’ve read, at least). That seems more an effect of how it was used in that instance rather than the “plot device” itself.