27 user 9 critic

Mirror, Mirror 

A transporter accident places Captain Kirk's landing party in an alternate universe, where the Enterprise is in the service of a barbarically brutal empire.


Marc Daniels


Gene Roddenberry (created by), Jerome Bixby




Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
BarBara Luna ... Marlena (as Barbara Luna)
James Doohan ... Scott
George Takei ... Sulu
Nichelle Nichols ... Uhura
Vic Perrin Vic Perrin ... Tharn
Walter Koenig ... Chekov
John Winston John Winston ... Lt. Kyle
Garth Pillsbury ... Wilson
Pete Kellett Pete Kellett ... Kirk's Henchman


Beamed up during an ion storm, which causes a transporter malfunction, the landing party of Kirk, McCoy, Scotty and Uhura find themselves in a mirror universe aboard a parallel Enterprise run by ruthless barbarians. The ion storm also caused their malicious counterparts to beam to the real starship. Kirk and the others must find a way home before they are discovered and exposed by their parallel crew members, who use treachery, back-stabbing and seduction to get what they want. Written by fkelleghan@aol.com

Plot Summary | Plot Synopsis


TV-PG | See all certifications »

Did You Know?


First appearance of the emergency manual monitor set. See more »


In beginning scene when Kirk and the others first beam back up to the Enterprise, Kirk signals the ship to engage, then puts his communicator away and puts his hands down by his side. As they first appear in the transporter pad aboard the ship, he has his communicator still in his hand, held up to his mouth. During the original series, movement during transport was not possible. See more »


Mirror Spock: I shall operate the transporter. You have two minutes and ten seconds.
Captain James T. Kirk: In that time, I have something to say. How long before the Halkan prediction of galactic revolt is realized?
Mirror Spock: Approximately two hundred and forty years.
Captain James T. Kirk: The inevitable outcome?
Mirror Spock: The Empire shall be overthrown, of course.
Captain James T. Kirk: The illogic of waste, Mr. Spock. A waste of lives, potential, resources, time. I submit to you that your Empire is illogical because it cannot endure. I submit that *you* are illogical to be a willing part of it.
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Referenced in Futurama: The Lesser of Two Evils (2000) See more »

User Reviews

One of TOS best
13 May 2019 | by aeowen-03398See all my reviews

I first saw this episode in 1973, when I was 7 and able to understand the meaning of Trek. This has turned out be in my top three episodes of TOS, and here 44 years later, I can never stop watching it.

Now granted there is Star Trek Continues and they made a good follow up to the story, but I would love to see this continue more. What eventually did become of the Terran Empire after the overthrow? Too many questions that should be followed up, in my opinion.

Awesome episode. One of TOS very, if not the best.

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Greek | English

Release Date:

6 October 1967 (USA) See more »

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Technical Specs


Sound Mix:

Mono | DTS (re-mastered version)| Dolby Digital (re-mastered version)


Color | Color (Technicolor)

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