Guest Stars James Doohan as Lt. Cmdr. Montgomery "Scotty" Scott Nichelle Nichols as Lt. Nyota Uhura George Takei as Lt. Hikaru Sulu John Winston as Lt. Kyle William Shatner as Mirror Kirk George Takei as Mirror Sulu James Doohan as Mirror Scotty Walter Koenig as Mirror Chekov Leonard Nimoy as Mirror Spock Nichelle Nichols as Mirror Uhura Barbara Luna as Mirror Marlena Barbara Luna as Lt. Marlena Moreau John Winston as Mirror Kyle Garth Pillsbury as Wilson Vic Perrin as Tharn Vic Perrin as Mirror Tharn Pete Kellett as Farrell
