Re: Favorite Mirror Universe Episode?
DS9's Crossover with Mirror, Mirror as a very close second. IMO Crossover is the most underrated Star Trek episode ever. The diminishing quality of the subsequent MU episodes tend to distract from just what a great episode Crossover is.
"Can't you hurry this up a bit? I hear they eat dinner in Hades at twelve sharp and I don't aim to be late."
Black Jack Ketchum, just before he was hanged in Clayton, New Mexico on April 26, 1901