"The Siege" is the 23rd episode of the science fiction television series Star Trek: Deep Space Nine. It is the third in a three-part story arc, and the third episode of the second season. In this episode, Benjamin Sisko and Li Nalas help stop DS9 from being commandeered by the Bajorans, while Kira and Dax try to put an end to the Circle.

As the Bajoran assault vessels approach Deep Space Nine, Sisko announces that he is evacuating the station's civilian population and anyone who wishes to leave. The entire crew volunteers to stay with him and fight (with the senior staff finding various 'excuses' to remain against orders), and various people react differently: Jake Sisko and Nog find out that they will be on different runabouts, but determine to stay friends. Meanwhile, Keiko O'Brien urges her husband, Miles to leave with her, and Quark decides to broker nonexistent additional seats. Li Nalas calms the resulting flood of passengers by inspiring courage in his fellow Bajorans; Quark is subsequently left on the station when his brother Rom outdoes him in deviousness and sells Quark's seat to a Dabo girl.

Once the Bajoran forces arrive, there is no sign of Federation presence, however General Krim is highly suspicious. The station's security net is disabled and the Federation crew is unaccounted for, leading him to believe they are still aboard. Jaro orders Krim to capture Li Nalas alive, convinced that he can bribe Li into joining the Circle. When the sensor-array is sabotaged, his suspicions are confirmed and the soldiers begin a search of the station. Odo uses his shape-shifting abilities to help the crew avoid detection and capture a number of soldiers during the search.

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