The Green Arrow is liberating a local convenience store from pesky and average robbers. Green Latern appears and brings him to the Justice League headquarters, who have invited a large number of superheroes. The Justice League is going to be more organized now with their larger roster, though Green Arrow doesn't seem to be impressed. Then, a large radiation is detected in their radars. J'onn sends Latern, Supergirl, and Captain Atom to take care of the situation. Green Arrow joins them. When they get there, the government officials try swaying them away, but then a large creature appears, and starts burning up the entire forest. Green Latern, while trying to save several civilians, is knocked out. The Chinese military tell them that they the creature was meant to be their protector, and the only way to stop it is to stick Carbon rods within its chest. Green Arrow grabbed one, stuck one in the appropriate slot, and it was defeated. Captain Atom, who blew up as a result of the battle, was quickly collected and replenished. Green Arrow decides to stick with the League a little longer because of a hero that has caught his eye.
For a person who's been watching anime just about the past year, watching something like Justice League Unlimited is a really nice change and pace. I'm not one to like the episodic type of shows, but how Justice League executes each episode is really well done. I really liked how this episode made use of every single second. It did a great job of introducing the Green Arrow's "lone" type of personality with him taking care of the robbers in the beginning of the episode. Overall, a good episode.