Ep. 10: Casualties of War

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Yinsen holds everyone in the Arc Reactor hostage for the prime minister Kuroda to meet his demands. Sakurai has managed to rescue Tony and head over to the Arc Reactor, avoiding Sagittarius, while Nanami brings Tony his armor. Iron Man destroys Sagittarius, then proceeds to battle Yinsen once more. Zodiac sends the Iron Man Sigma to kill Yinsen as he destroys them. (Source: Wikipedia)