Setsuna (刹那) is the twenty-fifth episode of Mobile Suit Gundam 00 and the last episode of Season 1.

The Celestial Being mothership Ptolemaios has been destroyed, and most of the Gundams are damaged beyond repair. Setsuna continues his desperate fight against the overwhelming power of Alejandro Corner's mobile armor and the final weapon hidden within it. One last enemy, however, is waiting for him in the darkness of space. A new world is about to be born from this destruction. Years later, the true form of this world reformation will become apparent, and a new Gundam will appear on the stage.

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