Episode 2: Secret Origins (2) -

: The initial duo investigating the threat.

: Arrives last, quickly making his presence known with his speed and lighthearted attitude. The Fall of Mars Episode 2: Secret Origins (2)

The invaders, who are nocturnal and find sunlight fatal, begin constructing massive factories to shroud Earth in perpetual darkness. To stop them, the heroes split into teams to sabotage these facilities: : The initial duo investigating the threat

J'onn reveals the tragic history of his home planet. A thousand years ago, Mars was a peaceful civilization until these parasitic invaders arrived, feeding on Martian psychic energy and eventually wiping out the entire race. J'onn, the sole survivor, had kept them in stasis for centuries until Earth astronauts accidentally released them. The Invasion Intensifies To stop them, the heroes split into teams

In the second part of the Justice League premiere episode, "," the world’s greatest heroes finally unite to combat a global alien invasion. The Heroes Assemble