DS9 Season 1 Episode 3 Past Prologue

Plot

The crew of Deep Space Nine rescue the Bajoran Tahna Los (Jeffrey Nordling) from a vessel that is being attacked by the Cardassians. They state that Tahna is a known member of a terrorist organization and demand his return, but Tahna asks for political asylum, pleading to his former friend Major Kira Nerys (Nana Visitor) for help. Commander Benjamin Sisko (Avery Brooks) grants his request. Later, Odo (René Auberjonois) spots Tahna with the Duras sisters (Barbara March and Gwynyth Walsh) making covert discussions. Tahna also seeks to gain the use of a runabout from Kira.
Dr. Julian Bashir (Alexander Siddig), thanks to his new-found friend Elim Garak (Andrew Robinson), overhears the Duras sisters planning to rendezvous with the Bajoran to give him a vial of bilitrium, a crystalline compound that can release a tremendous amount of power, but only if connected to an antimatter converter. Garak reveals why the Cardassians were chasing Tahna: he stole one from them, meaning he will have the component materials required to build a bomb.
With no solid evidence to act currently, the crew allow him to take a runabout and intend to arrest him after the transaction. Kira finds herself confused about her own past with the Bajoran resistance and where her current loyalties stand, and offers to go with Tahna in the runabout. Commander Sisko and Chief Miles O'Brien (Colm Meaney) wait in a second runabout nearby while Tahna and Kira complete the transaction. When the second runabout appears, Tahna realizes he has been set up; matters are further complicated by the arrival of the Cardassian warship.
Tahna orders Kira at gunpoint to return to the station, intending to collapse the wormhole with an explosive device, because then Bajor will have no motivation to invite Federation presence on Bajoran territory, which he sees as a new occupation. Kira lurches the runabout to one side, causing Tahna to fall over and allowing her to pilot the ship through the wormhole to the Gamma Quadrant; where she ejects the bomb causing it to explode harmlessly in space. However, Tahna has regained control of his weapon and orders Kira to return to the Alpha Quadrant. There, Sisko gives Tahna an ultimatum, either to give himself over to the station's authorities, or to wait to be destroyed by the Cardassians. Tahna hands over his weapon to Kira, and turns himself in; Kira explains that he may come to understand why this was the right thing to do someday.The crew of Deep Space Nine rescue the Bajoran Tahna Los (Jeffrey Nordling) from a vessel that is being attacked by the Cardassians. They state that Tahna is a known member of a terrorist organization and demand his return, but Tahna asks for political asylum, pleading to his former friend Major Kira Nerys (Nana Visitor) for help. Commander Benjamin Sisko (Avery Brooks) grants his request. Later, Odo (René Auberjonois) spots Tahna with the Duras sisters (Barbara March and Gwynyth Walsh) making covert discussions. Tahna also seeks to gain the use of a runabout from Kira.
Dr. Julian Bashir (Alexander Siddig), thanks to his new-found friend Elim Garak (Andrew Robinson), overhears the Duras sisters planning to rendezvous with the Bajoran to give him a vial of bilitrium, a crystalline compound that can release a tremendous amount of power, but only if connected to an antimatter converter. Garak reveals why the Cardassians were chasing Tahna: he stole one from them, meaning he will have the component materials required to build a bomb.
With no solid evidence to act currently, the crew allow him to take a runabout and intend to arrest him after the transaction. Kira finds herself confused about her own past with the Bajoran resistance and where her current loyalties stand, and offers to go with Tahna in the runabout. Commander Sisko and Chief Miles O'Brien (Colm Meaney) wait in a second runabout nearby while Tahna and Kira complete the transaction. When the second runabout appears, Tahna realizes he has been set up; matters are further complicated by the arrival of the Cardassian warship.
Tahna orders Kira at gunpoint to return to the station, intending to collapse the wormhole with an explosive device, because then Bajor will have no motivation to invite Federation presence on Bajoran territory, which he sees as a new occupation. Kira lurches the runabout to one side, causing Tahna to fall over and allowing her to pilot the ship through the wormhole to the Gamma Quadrant; where she ejects the bomb causing it to explode harmlessly in space. However, Tahna has regained control of his weapon and orders Kira to return to the Alpha Quadrant. There, Sisko gives Tahna an ultimatum, either to give himself over to the station's authorities, or to wait to be destroyed by the Cardassians. Tahna hands over his weapon to Kira, and turns himself in; Kira explains that he may come to understand why this was the right thing to do someday.