The League expands their operations, enlisting new recruits across the globe. The newest of these is Green Arrow, who has repeatedly refused to respond to invitations to join the League. He is therefore pulled to the rebuilt, and much larger, Watchtower by teleport. Opting against joining, he hitches a ride back to Earth with the team of Green Lantern, Captain Atom and Supergirl, who have been sent on a mission to stop a giant, uncontrolled, nuclear-powered defense robot in an unnamed Asian country existing in self-imposed international isolation.
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Complete story — includes the ending
The Justice League expands its operations, enlisting new recruits from across the globe. One of the newest is Green Arrow, who has repeatedly refused to join the League, until he is teleported onto the League's newly rebuilt Watchtower. Although hesitant to still join, he finds himself joining a mission with Green Lantern, Captain Atom and Supergirl, as they attempt to stop a nuclear-powered robot rampaging across Eastern Asia. After the mission is successful Green Arrow once again attempts to refuse to join but changes his mind upon catching sight of Black Canary.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Justice League Unlimited episodes. HTML formatting and reference markers removed. · Content license