alternate universes of star trek

Here's the list of episodes that's from the fan collective alternate realities dvd:

 Star Trek TOS:  Mirror, Mirror episode #039
 Star Trek DS9:  Crossover, Through The Looking Glass, and Shattered Mirror: episodes #443,466 and 492
 Star Trek Enterprise: In a Mirror Darkly Parts 1 & 2: episodes #094 and 095
 Star Trek TOS: The Alternative Factor: episode #020
 Star Trek NG: Parallels: episode#263

Star Trek TOS: The Enemy Within and Turnabout Intruder: Episodes #005 and 079
Star Trek NG: Frame of Mind: episode #247
Star Trek Voyager: Shattered: episode #257

Star Trek NG: Yesterday's Enterprise and The Inner Light : Episode #163 and #225
Star Trek DS9: The Visitor: Episode #476
Star Trek Voyager: Before and After: Episode #063

Star Trek Voyager: Timeless and Course:Oblivion: episodes #201 and 213
Star Trek Enterprise: E squared and Twilight: episodes #073 and 060