"STAR TREK VOYAGER" RETROSPECT - (4.23) "Living Witness"

The STAR TREK franchise has aired a good number of episodes featuring the "Mirror Universe" - an existence in which the Federation is solely a Human-controlled, fascist empire. This universe was first introduced in the "STAR TREK" Season Two episode, (2.04) "Mirror, Mirror". The "Mirror Universe was also featured in several "STAR TREK DEEP SPACE NINE" episodes and most memorably in an "ENTERPRISE" episode called (4.18-4.19) "In a Mirror Darkly".

There have been parallel universe episodes featured in both "STAR TREK: NEXT GENERATION" and...