Star Trek: Deep Space Nine: Season 2, Episode 23

Crossover (15 May 1994)

TV Episode  -   -  Action | Adventure | Drama
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Kira and Bashir find themselves in an alternate universe.



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Title: Crossover (15 May 1994)

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Episode cast overview:
Doctor Bashir (as Siddig El Fadil)
Jake Sisko (credit only)
Telok (as John Cothran Jr.)
Jack Orend ...
Human (as Jack R. Orend)
Dennis Madalone ...


Kira and Bashir are returning from the opening of a hospital on New Bajor in the Gamma Quadrant. Just before the runabout enters the wormhole, there's a sudden problem. Kira is able to solve it, but when they arrive in the Alpha Quadrant things seems to have changed. Deep Space Nine is once again orbiting Bajor and the runabout is entered by Klingons, who excuse themselves when they see Kira. It soon becomes clear the two have arrived in alternate universe. Klingons, Cardassians and Bajorans have formed an alliance against Earth and humans are forced to do slave labor on Deep Space Nine. The station is led by intendant Kira. She tells a certain Kirk traveled from the other side earlier. While Bashir is sent away to ore processing, intendant Kira seems to really like her other self. Written by Arnoud Tiele (

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Release Date:

15 May 1994 (USA)  »

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Technical Specs


Aspect Ratio:

1.33 : 1
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Did You Know?


The Star Trek (1966) Universe revisits the Mirror Universe for the first time since Star Trek: Mirror, Mirror (1967). Star Trek: The Next Generation (1987) never visited that theme, although similar parallel universes were viewed in episodes such as Star Trek: The Next Generation: Yesterday's Enterprise (1990) and Star Trek: The Next Generation: Parallels (1993). The Mirror Universe would return in follow-up episodes of Star Trek: Deep Space Nine (1993), and also be featured in Star Trek: Voyager (1995) and Star Trek: Enterprise (2001). See more »


Intendant Kira: Benjamin - did I hurt your feelings?
Benjamin Sisko: I never had any to hurt, Intendant.
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Star Trek: Deep Space Nine - Main Title
Written by Dennis McCarthy
Performed by Dennis McCarthy
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User Reviews

Which wormhole?
20 May 2007 | by (Ireland) – See all my reviews

This episode is a direct continuation from one the best Star Trek episodes ever, Mirror Mirror. In this universe we see a very different Deep Space Nine to the one we're used to. Nana Visitor puts on a fantastic performance as two Kiras and a very different 'alternate' Kira. Amazing to see the impact of Kirk's words to Spock at the end of the aforementioned episode and how cataclysmic the changes were when Spock had initiated a change on the way the Empire had ruled and eventually led to the Empire losing it's stranglehold over the Galaxy. This episode is continued brilliantly later in the show's run and gave a lot of characters in the mirror universe a brilliant twist in character!!

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