In Mirror, Mirror, when the landing party is ready to beam up they are in normal Starfleet uniforms, like this:Landing party in Starfleet uniforms

When they materialize on the ISS Enterprise, they are in mirror universe uniforms:

Landing party in imperial uniforms

Is any in-universe explanation why their uniforms were not transported with them ever provided? And if not a canon in-universe explanation, was there ever an explanation provided by producers or other staff members?

  • I thought the ion storm caused those 4 to beam into the mirror universe and vise versa. So the mirror guys appear on Enterprise in their uniforms from their universe. Jul 27, 2016 at 18:16
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    @Jack B Nimble - I think the question is about why the transporter would differentiate their clothes and their bodies--if the transporter signal from the prime universe got displaced into the mirror universe and vice versa, why wouldn't the prime clothes be part of that signal and get displaced too? Maybe you could imagine transporters transport bodies at full resolution and separately transport clothes in some kind of lower-resolution way to save energy or computing power, and so the body transporter signal is different from the clothes signal, and maybe comes in a fraction of a second off.
    – Hypnosifl
    Jul 27, 2016 at 18:21
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    good question - metaphysically, wonder if it is a mind transfer kind of thing - the prime crew is actually inhabiting the mirror bodies and vice versa because "transporter"
    – NKCampbell
    Jul 27, 2016 at 18:21
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    @NKCampbell: That's about the best answer I can think of. We have some good researchers on this site, so I'm curious if anyone can find a quotation or something that might give some kind of authoritative answer. If it is mind transfer, it'd be funny if one of them started wondering about scars on their mirror body that weren't there on their normal body.
    – Tango
    Jul 28, 2016 at 6:00
  • @Tango - I don't have it, but I wonder if the Blish novelization digs any further into it? I'd also have to go back and watch the DS9 / ENT mirror episodes - perhaps there is more information there?
    – NKCampbell
    Jul 28, 2016 at 14:09

1 Answer 1



Apparently they swapped uniforms with the people from the other universe. There wasn't the same level of commentary at the time during the Original Series, so lots of things were unexplained and then later fans started discussing them.

The behaviour of the transporter in Mirror Mirror is inconsistent with what we see in DS9.

In DS9, when this happens again, they don't swap uniforms. In fact, people from the Mirror Universe sneak various items onto Deep Space 9 in different episodes, and try to steal items from the station as well.

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