"Tribunal" is the 25th and penultimate episode of the second season of the syndicated American science fiction television series Star Trek: Deep Space Nine, the 45th episode overall. It is the first episode directed by cast member Avery Brooks (Commander Benjamin Sisko).

Set in the 24th century, the series follows the adventures on Deep Space Nine, a space station located near a stable wormhole between the Alpha and Gamma quadrants of the Milky Way Galaxy. In this episode, Chief O'Brien (Colm Meaney) is convicted and later accused at a tribunal held on Cardassia Prime, where the legal status of the accused is determined before the trial even begins: guilty. This episode provided a look at the Cardassian judicial system and culture.

Chief O'Brien is just about to head off on vacation, but he can't bring himself to let someone handle his duties while he is away and so he annoys the other members of the command staff with reminders about various things until they order him to leave. While he is on his way to meet his wife Keiko, Miles runs into an old crewmate named Raymond Boone (John Beck). The two had served together on the USS Rutledge, before O'Brien served aboard the Enterprise and long before he arrived on Deep Space Nine. The two old friends chat briefly and part ways.

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