| "Crossover" | |
|---|---|
| Star Trek: Deep Space Nine episode | |
| Episode no. | Season 2 Episode 23 |
| Directed by | David Livingston |
| Story by | Peter Allan Fields |
| Teleplay by | |
| Featured music | Dennis McCarthy |
| Production code | 443 |
| Original air date | May 16, 1994 |
| Guest appearances | |
| |
"Crossover" is the 43rd episode of the science fiction television series Star Trek: Deep Space Nine, and the 23rd episode of the second season. This episode was written by Peter Allan Fields and Michael Pillar, and directed by David Livingston. It aired on broadcast television on May 16, 1994.
Set in the 24th century, the series follows the adventures on Deep Space Nine, a space station located adjacent to a stable wormhole between the Alpha and Gamma quadrants of the Milky Way Galaxy, near the planet Bajor. In this episode, first officer Kira and Doctor Bashir have an adventure in Star Trek's Mirror Universe, a parallel universe setting introduced in the episode "Mirror, Mirror" of the original Star Trek series.[1] It is the first of five Deep Space Nine episodes to involve the Mirror Universe.