Star Trek: Season 2, Episode 4

Mirror, Mirror (6 Oct. 1967)

TV Episode  |   |  Action, Adventure, Mystery
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Ratings: 9.1/10 from 1,511 users  
Reviews: 16 user | 6 critic

A transporter accident places Capt. Kirk's landing party in an alternate universe, where the Federation is a barbarically brutal empire.



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Title: Mirror, Mirror (06 Oct 1967)

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Episode complete credited cast:
Marlena (as Barbara Luna)
Vic Perrin ...
John Winston ...
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

Plot Summary | Plot Synopsis


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Release Date:

6 October 1967 (USA)  »

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Aspect Ratio:

1.33 : 1
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Did You Know?


The Star Trek books 'Spectre', 'Dark Victory', and 'Preserver', all written by William Shatner, are about the mirror universe. They take place in the 24th Century at around the same time as the Next Generation movies, and give a 100-year history of events in the mirror universe starting after this episode. See more »


After the fight, mirror Spock is unconscious on the table, mirror Sulu shows up and does not have the big ugly scar on the right side of his face. See more »


Dr. McCoy: Jim, I think I liked him with a beard better. It gave him character. Of course almost any change would be a distinct improvement.
Captain James T. Kirk: What worries me is the easy way his counterpart fitted into that other universe. I always thought Spock was a bit of a pirate at heart.
Mr. Spock: Indeed, gentlemen. May I point out that I had an opportunity to observe your counterparts here quite closely. They were brutal, savage, unprincipled, uncivilized, treacherous - in every way splendid examples of homo sapiens, the very...
See more »


Referenced in Trekkies 2 (2004) See more »

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User Reviews

The Agony of an Empire
16 August 2006 | by (United States) – See all my reviews

When the bearded Spock says 'Your Agonizer, Please,' you know you're in for some great science fiction, Trek style. If I was under threat of an Agony Booth to make a choice, I'd have to go with this episode as my all-time favorite of the original series. Not an easy choice, of course. "The City on the Edge of Forever" is more literate and "The Trouble With Tribbles" may get by better on sheer entertainment value, but there's something about tapping into the dark side of all our beloved characters here which makes this an irresistible mix of tension and adventure - an ultimate Trek, if you will. For you see, it's not just the depiction of the alternate versions of Spock, Sulu and Chekov in this violent, parallel universe that's so intriguing. There's also the thrill of observing our Kirk swiftly adapt to his new environment: sure, he gets caught off-guard by the evil Chekov early on, but in the next minute he's knocking out his supposed savior - see, that's what the evil Kirk would do and our Kirk has already figured it all out. It's tantalizing, no pun intended, to surmise just how our good Kirk would have survived in this universe of the evil Empire had he been stuck there for the rest of his life; personally, I think he would've taken over the whole galaxy within the next decade - he's just that quick on his feet. Witness the scene of him and the bearded Spock as they stroll down the ship's corridor, their personal bodyguards following; Kirk's in complete control. I think part of him was looking forward to the prospect of remaining in this savage universe when it looked like he'd have to operate the transporter to send the others back near the end.

And it's not just Kirk - wonder of wonders, could this be our Uhura - taunting the evil Sulu, slapping him and stopping just short of sticking a little blade between his ribs? Looks to me like she was trained for a lot more than just communications - yes, she had that little scene of fright overcoming her before Kirk's pep talk, but after that, there was no stopping her. In a way, this episode is mesmerizing: you wonder what our intrepid foursome of cosmic castaways will run into next in every scene and how they'll handle it. The scripting doesn't disappoint: there are creative innovations to this strangely atmospheric Enterprise around every corner, subtle or jarring. The new gadgets are interesting but my favorite innovation is the entire concept of special bodyguards shadowing their superiors - that twist just spells Empire not Federation. Of course, the whole assassination angle is a dead giveaway. Plotwise, it's an excellent tightrope, and we get to see some of the best action scenes towards the climax. And then we have the evil, yet not so evil Spock. When Spock puts his mind to it, he can be pretty scary; it's hard to forget his sinister threat to Sulu. But, speaking of Sulu, strange as it may seem after all the great stuff just described, Takei as Sulu ends up with the greatest single scene of the episode. His bid to take over the ship, as he describes his plan to get rid of both Kirk & Spock, takes it all to yet another level. Dripping with slimy intensity, twirling his knife, a gleam of manic nastiness in his eyes, Takei just nails it. He should have played villains for the rest of his career.

The potency of this episode is reflected in the fact that the later Trek series, Deep Space Nine, featured several episodes as sequels to this one. However, good as they were for a DS9 series, they paled in comparison to this original wonder.

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